Terms of Service

Last updated: 7 August 2026

These Terms of Service govern your use of TrueMargin, a profit-analytics service for Amazon sellers operated by Tars LLC. They explain what the Service does, what you may and may not do with it, how subscriptions and scan credits are billed, the limits of the figures the Service produces, and how the agreement between us can end. Please read them before you create an account or connect an Amazon seller account.

1. Acceptance of these terms

These Terms of Service (the “Terms”) form a binding agreement between you and Tars LLC (“Tars”, “we”, “us”), a limited liability company organized in the State of Wyoming, United States, with its registered office at 30 N Gould St # 21464, Sheridan, WY 82801, which operates TrueMargin at https://truemargin.com.tr and https://app.truemargin.com.tr, together with the TrueMargin browser extension (together, the “Service”).

By creating an account, connecting an Amazon seller account, installing the browser extension or otherwise using the Service, you accept these Terms. If you do not accept them, do not create an account and do not use the Service.

If you accept these Terms on behalf of a company or another legal entity, you confirm that you are authorised to bind that entity, and in these Terms “you” means that entity.

2. Who may use the service

The Service is built for businesses that sell on Amazon. It is not designed for, or offered to, consumers buying for personal purposes. By using the Service you confirm that:

  • You are at least 18 years old and able to enter into a binding contract.
  • You use the Service for business purposes, in connection with selling on Amazon.
  • You are the seller of record for each Amazon seller account you connect, or you are authorised by that seller to connect it and to have its data processed in TrueMargin.
  • You are not barred from using the Service, or from using Amazon’s services, under applicable law or under your own agreements with Amazon.
  • The information you give us when you register is accurate, and you keep it up to date.

We may refuse a registration, or close an account, if these conditions are not met.

3. The service we provide

TrueMargin is a profit and margin analytics tool for Amazon sellers. Depending on the modules in your subscription, it can:

  • Synchronise order, order-item, product and FBA inventory data from the Amazon seller accounts you connect through the Amazon Selling Partner API.
  • Import order data from CSV files that you upload.
  • Calculate revenue, Amazon fees, cost of goods, transaction taxes and the resulting profit, margin and return figures at order, order-item and product level.
  • Look up Amazon product data by ASIN, keyword or seller, both in the web application and through the TrueMargin browser extension on supported Amazon marketplace pages.
  • Track inventory and warehouse stock, record cost entries, and save products you are researching together with your own notes.
  • Generate automated alerts from the data in your account, such as negative-profit, margin-threshold and stock-level alerts.
  • Present figures in a reporting currency of your choice, converted using daily reference exchange rates.

Not every module is enabled on every account. What is available to you depends on the modules and tiers in your subscription, on the Amazon marketplaces and permissions your authorisation covers, and on the data you have connected or imported.

The Service reads data from Amazon. It does not create, edit, cancel or price your listings, it does not send messages to buyers, and it does not move money.

4. Accuracy and limits of the calculations

This section is important. TrueMargin is a decision-support tool. It is not an accounting system and it does not provide accounting, tax, legal or investment advice. Every figure it shows is a calculation based on the data available to it at that moment.

Figures shown in TrueMargin can and will differ from the amounts in Amazon’s own settlement and payment reports. The main reasons are:

  • Timing. Amazon’s order data reports what the buyer paid. Referral commission and FBA fulfilment fees are posted separately to Amazon’s financial events ledger, and only once a shipment settles. Until those fees post, an order can appear with no fees deducted and its profit will look higher than it is.
  • Data you supply. Cost of goods, shipping and preparation costs, tax scheme and similar settings come from you. If those inputs are missing or wrong, the results will be wrong.
  • Costs that do not reach us. Amounts Amazon does not return through the interfaces we use, and costs you have not entered — for example advertising spend or storage charges — are not deducted.
  • Currency conversion. Where a figure is shown in a reporting currency other than the currency of the transaction, we convert it using daily reference rates published by the European Central Bank; for currencies the rate provider does not quote, such as AED, we use a fixed peg; and where a manual rate has been configured for the service, it overrides both. None of these rates is the rate Amazon, your payment provider or your bank actually applies.
  • Research estimates. Product research figures, including those shown by the browser extension, are estimates built from third-party product data and from the assumptions configured in your settings. They are not settled amounts.
  • Fee grouping. Fee components returned by Amazon are grouped into commission, fulfilment and other fees. That grouping is a simplification of Amazon’s own fee taxonomy.

You remain solely responsible for your own bookkeeping, financial reporting and tax filings. Before you rely on a figure for accounting, tax or a significant commercial decision, verify it against Amazon’s own reports and, where appropriate, with your accountant or tax adviser.

Alerts are generated automatically from the data already synchronised to your account. They may be delayed, incomplete or absent, and must not be your only means of monitoring your business.

5. Accounts and security

You must give accurate and current information when you register, and keep it up to date. Your account is personal to you: do not share one account between people who should each have their own access.

The Service applies the following security measures, and you are responsible for working with them rather than around them:

  • Passwords set on TrueMargin must be at least 12 characters long and contain at least one letter and one number. We store only a bcrypt hash of your password, never the password itself.
  • Two-factor authentication by one-time code sent to your email address is enabled by default on every new account. If you switch it off, that change itself must be confirmed with an emailed code.
  • Only one session per account can be active at a time. Signing in on a new device ends the session on the previous one.
  • One-time codes, password-reset links, email-verification links and team invitations expire after a limited time and can only be used once.
  • You are responsible for keeping your password, your one-time codes, your extension API key and access to your email inbox confidential, and for all activity carried out under your account.

Tell us promptly at contact@tarslimited.com if you believe your account, your email address or your extension API key has been accessed without your authorisation. Changing your password ends your other sessions and revokes your extension API keys.

6. Team members and roles

If you are the owner or an administrator of the account, you can invite other people by email and give each of them a role — administrator, analyst or viewer — that determines what they can see and change. The owner role belongs to the account holder and cannot be granted through an invitation. An invitation link expires if it is not used within seven days.

By inviting someone you confirm that you may share the connected Amazon data and your other business data with that person. You are responsible for choosing appropriate roles, for removing members who should no longer have access, and for everything those members do in the Service. Acts and omissions of your team members are treated as your own under these Terms.

Everyone you invite must also comply with these Terms.

7. Connecting your Amazon account

You connect an Amazon seller account by authorising TrueMargin through Amazon’s own consent flow in Seller Central. We never ask for your Amazon username or password, and you must never give them to us or to anyone acting as if they were us.

By connecting an account you confirm that you are the seller of record or are authorised by the seller of record to grant that authorisation, and that granting it does not breach any agreement between you and Amazon. If you import CSV files instead, you confirm that you are entitled to provide us with the data they contain.

We access Amazon data only under the authorisation you grant and only in order to provide the Service to you. We retrieve order and order-item records, financial fee components and FBA inventory quantities. We do not request Amazon buyer personal data — no buyer name, email address, telephone number or shipping address — and we do not use Amazon’s Restricted Data Token flow. We do not aggregate data across our users’ businesses in order to provide or sell it to third parties.

You can revoke TrueMargin’s authorisation at any time from your Amazon Seller Central account. Once the authorisation ends we stop synchronising new data. Data already synchronised stays in your TrueMargin account until you delete the connected store or your account, as described under “Suspension and termination”.

8. Relationship with Amazon

TrueMargin is an independent solution provider. Tars LLC is a separate legal entity from Amazon and from the Amazon selling partners who use the Service, and operates under its own permissions. We are not affiliated with, endorsed by, sponsored by or otherwise associated with Amazon.com, Inc. or any of its affiliates.

“Amazon”, “Amazon Seller Central”, “FBA” and related names and logos are trademarks of Amazon.com, Inc. or its affiliates. We refer to them only to describe what the Service is compatible with.

Your use of Amazon’s services, and of the data you obtain through them, remains governed by your own agreements with Amazon, including Amazon’s acceptable use and data protection requirements. Nothing in these Terms overrides or reduces those obligations, and in respect of Amazon data Amazon’s requirements prevail over anything inconsistent in these Terms.

Amazon is not a party to these Terms and has no responsibility for the Service.

9. Plans, credits and billing

Creating a TrueMargin account is free, and a free tier is available for the store module. Paid functionality is sold as modules — connected stores, product scans, inventory tracking and orders — and you choose a tier for each module you want. The tiers you select combine into a single subscription, billed monthly or yearly. The current modules, tiers, inclusions and prices are published at https://truemargin.com.tr/fiyatlandirma.

Paid subscriptions are processed by Stripe. Payment details are entered on payment pages hosted by Stripe, which you reach by being redirected away from our site. Card numbers and card security codes never reach our servers and are never stored by us. From Stripe we receive only the card brand, the last four digits and the expiry date, so that you can recognise your saved payment method.

So that your subscription and invoices can be issued, we create a customer record at Stripe containing your account email address and name. Invoices are issued to the billing details you enter in the application, and keeping those details accurate — including any tax identification number — is your responsibility. Prices are exclusive of any taxes that apply to you, unless stated otherwise at the point of purchase.

Product scans are metered in credits, and how many credits a request consumes depends on the operation you run and on how much data you ask for. A basic product lookup costs the least; a keyword search costs credits in proportion to the number of result pages it requests; and a full analysis costs more when fee, offer, sales-rank, dimension or second-marketplace data is included, so a single product can cost several credits. We reserve the maximum a request could cost before it runs and return any credits it does not use, and a lookup we can answer from our own cache costs nothing.

We do not fix the credit cost of individual operations in this document, because those costs change as the Service and the data providers behind it develop. The application shows the estimated credit cost of an action before you run it, together with your remaining balance, and the credit allowance included in each tier is published at https://truemargin.com.tr/fiyatlandirma. Your allowance resets at the start of each billing period and does not carry over to the next one. When the allowance for a period is used up, scanning stops until the next period begins or you move to a higher tier. Modules you have not purchased are not available on your account.

Prices can change. Changed prices are published on the pricing page before they take effect for your subscription, and a price change never applies to a period you have already paid for.

10. Renewal, changes and cancellation

Subscriptions renew automatically at the end of each billing period — monthly or yearly, according to the term you chose — until they are cancelled. Renewals are charged through Stripe to the payment method on file.

You can cancel at any time from the billing settings inside the application. Cancellation takes effect at the end of the billing period you have already paid for: your plan stays active until that period ends and is not renewed afterwards. Cancelling a subscription does not delete your account or your data; you delete those separately.

You can also change your package at any time by rebuilding it in the application: add a module, move to a different tier, or remove a module you no longer need.

If a renewal payment fails, we may allow continued access for a short grace period while the payment is retried. If payment is still not completed, access to the paid modules ends.

If you believe you have been billed in error, contact us at contact@tarslimited.com and we will review it. Any refund rights you have under mandatory applicable law are not affected by these Terms.

11. Acceptable use

You must use the Service lawfully and only as these Terms allow. You must not:

  • Copy, modify, decompile, disassemble or reverse engineer any part of the Service, or attempt to derive its source code or the internal logic of its calculations, except to the extent this cannot lawfully be restricted.
  • Scrape, crawl, bulk-download or systematically extract content or data from the Service, or access it by automated means other than the interfaces we provide.
  • Resell, sublicense, rent or otherwise make the Service available to third parties, or operate it as a service for others, without our prior written agreement.
  • Circumvent, or attempt to circumvent, credit metering, module locks, plan limits, rate limits or any other technical restriction, including by opening several accounts for that purpose.
  • Share account credentials or an extension API key with anyone outside your account, or use another person’s account.
  • Interfere with the Service or the infrastructure it runs on, including by attempting unauthorised access, by probing or load-testing it without our written permission, or by introducing malicious code.
  • Connect an Amazon seller account you are not authorised to connect, or upload data you have no right to give us.
  • Use the Service in a way that breaches applicable law, infringes anyone’s rights, or breaches Amazon’s Acceptable Use Policy, Amazon’s data protection requirements or your other agreements with Amazon.
  • Use the Service or its output to publish insights or claims about Amazon’s business, or to build a competing product.

We may investigate suspected breaches and take proportionate action, including the measures described under “Suspension and termination”.

12. Intellectual property and your data

The Service — including its software, interface, text, design, documentation and the methodology behind its calculations — belongs to Tars LLC or its licensors and is protected by intellectual property law. These Terms give you a limited, non-exclusive, non-transferable right to use the Service while your account is active, and nothing more. No other rights are granted, expressly or by implication.

Your data remains yours. The order, product, inventory, cost and note data you connect, import or enter, and the results calculated from it, stay your property. You grant us a limited, non-exclusive, worldwide, royalty-free licence to host, store, process, transmit and display that data solely in order to operate and support the Service for you and the team members you have invited, and to meet our legal obligations. That licence ends when the data is deleted.

We do not sell your data, and we do not use your business data to build products, benchmarks or datasets for other customers.

If you send us feedback or suggestions about the Service, we may use them to improve it without any obligation or payment to you.

13. Privacy and data protection

How we handle personal data is described in our Privacy Policy at https://truemargin.com.tr/privacy, which forms part of these Terms. Our Turkish personal data notice (KVKK aydınlatma metni) is published at https://truemargin.com.tr/kvkk.

The following are properties of the Service as it is built today:

  • The application database is PostgreSQL, self-hosted on our own server rather than on a third-party cloud database service.
  • Traffic to the website, the application and our API is served over HTTPS with certificates issued by Let’s Encrypt.
  • The application and the browser extension contain no analytics, advertising, tracking, session-replay or error-reporting technology. The only cookies the application sets are the session cookie, the trusted-device cookie and the cookie that remembers your interface language.
  • We store no Amazon buyer personal data of any kind.
  • Card details never reach our servers, because payment pages are hosted by Stripe.
  • Passwords are stored only as bcrypt hashes; session tokens, one-time codes and extension API keys are stored only as hashes; your Amazon authorisation token is encrypted before it is written to the database.

We rely on a small number of external providers to run the Service: Amazon for the Selling Partner API, Stripe for payments, an email provider for transactional email such as security notifications and invoices, product-data providers for Amazon product lookups, and a public reference-rate service for exchange rates. Each of them receives only what is needed for its part of the Service, as described in our Privacy Policy.

14. Suspension and termination

You can stop using the Service at any time. You can cancel a subscription from the application, and you can delete your account yourself from the Security tab of your profile settings. Deleting an account requires your current password and a one-time code sent to your email address, even if two-factor authentication is switched off.

We may suspend or terminate your access, in whole or in part, if you materially breach these Terms, if you do not pay for a paid subscription, if your use breaches applicable law or Amazon’s policies, if your use threatens the security, integrity or availability of the Service or the data of other users, or if we are required to act by law or by Amazon. Where it is practicable and lawful, we will give you notice and, for breaches that can be put right, a reasonable opportunity to do so.

We may also discontinue the Service as a whole. If we do, we will give reasonable prior notice to the email address on your account and will not charge you for any period after the Service stops.

When you delete your account, the deletion is immediate and cannot be undone. Your user record and the data attached to it are deleted, together with any connected Amazon store of which you were the only remaining member — including the orders, products and inventory data synchronised or imported into those stores, and the stored Amazon authorisation. A store that still has other members is not deleted; only your membership of it is removed. Copies of deleted data may remain for a short time in routine database backups until those backups are deleted as part of the backup rotation.

There is no grace period and no recovery window, so export anything you want to keep before you delete. The application lets you export the tables you work with as CSV files. If we terminate or suspend your account, we will, where lawful and practicable, give you a reasonable opportunity to export your data before it is deleted.

15. Disclaimer of warranties

The Service is provided on an “as is” and “as available” basis. To the fullest extent permitted by law, we exclude all warranties, conditions and representations that are not expressly stated in these Terms, whether express or implied, including implied warranties of merchantability, fitness for a particular purpose, accuracy and non-infringement.

In particular, and without limiting the section on accuracy above, we do not warrant that the Service will be uninterrupted, timely, secure or error-free; that the figures it produces will match Amazon’s settlement reports or your accounting records; that data will synchronise completely or on time; or that every defect will be corrected.

Parts of the Service depend on third parties, including Amazon’s Selling Partner API, our payment processor, our email provider and product-data providers. Those services can change, become unavailable, apply rate limits or return incomplete data, and we are not responsible for their acts or omissions.

We apply the security measures described in these Terms and in our Privacy Policy, but no online service can be guaranteed to be free of vulnerabilities.

16. Limitation of liability

Nothing in these Terms limits liability that cannot be limited by law, including liability for death or personal injury caused by negligence, for fraud or fraudulent misrepresentation, or for wilful misconduct or gross negligence.

Subject to that, we are not liable for loss of profit, revenue, sales, business, goodwill or anticipated savings; for loss or corruption of data beyond restoring the most recent available backup where we are able to do so; for business, pricing, purchasing, accounting or tax decisions made on the basis of figures produced by the Service; for discrepancies between those figures and Amazon’s own reports; or for any indirect or consequential loss.

Subject to the first paragraph of this section, our total aggregate liability arising out of or in connection with these Terms and the Service, whether in contract, in tort including negligence, or otherwise, is limited to the total amount you paid us for the Service in the twelve months immediately before the event giving rise to the claim.

You are responsible for your own use of the Service, for the accuracy of the data you put into it, and for meeting your own accounting, tax and regulatory obligations.

17. Changes to the service and to these terms

We develop the Service continuously and may add, change or remove features, modules and limits. We will not remove the core functionality of a module you have already paid for during a period you have paid for, except where we must do so for legal, security or third-party platform reasons.

We may update these Terms. The current version is always published on this page, and the date at the top shows when it last changed. Where a change materially affects your rights or obligations, we will make reasonable efforts to notify you in advance by email at the address registered on your account.

Changes take effect when they are published, or on the later date stated in the notice. If you continue to use the Service after that, you accept the updated Terms. If you do not accept them, cancel your subscription and stop using the Service. Changes required by law, by Amazon’s policies or to address a security issue may take effect immediately.

18. General terms

  • If any provision of these Terms is held to be invalid or unenforceable, the remaining provisions stay in force and the affected provision applies to the fullest extent permitted.
  • If we do not enforce a right or a provision, that is not a waiver of it.
  • You may not assign or transfer these Terms without our written consent. We may assign them to a successor to our business, on notice to you.
  • These Terms, together with the Privacy Policy they refer to and the plan details published on our pricing page, are the entire agreement between you and us about the Service.
  • These Terms are published in English and Turkish. Both versions describe the same agreement; if a difference in wording arises, the English version is the reference text, except where mandatory Turkish law requires the Turkish text to prevail.
  • These Terms do not create any partnership, joint venture, agency or employment relationship between you and us, and give no rights to anyone who is not a party to them.

19. Governing law

These Terms, and any dispute or claim arising out of or in connection with them or with the Service, are governed by the laws of the State of Wyoming, United States, without regard to its conflict-of-laws rules. Nothing in this section deprives you of the protection of any mandatory law of your country of residence.

Either party may seek injunctive relief from any court of competent jurisdiction to protect its intellectual property or its confidential information.

20. Notices

Questions, complaints and formal notices under these Terms must be sent to Tars LLC at contact@tarslimited.com.

We send notices to you by email at the address registered on your account, or by displaying them inside the application. Keep that address current: it is how we send security notifications, one-time codes, billing notices and notices under these Terms.

Contact

Questions about this document can be sent to the operator of TrueMargin:

Tars LLC
30 N Gould St # 21464, Sheridan, WY 82801, United States
Registered in: Wyoming · 2026-002000733
contact@tarslimited.com
+44 7576 034 999