Privacy policy

Last updated: August 18, 2026

1. Who we are

CostMe is a mobile app for manually tracking the quantity and cost of specific repeated purchases. Questions about this policy can be sent to hello@costme.app.

2. Information you enter

CostMe does not require a CostMe account. The trackers, expense entries, quantities, prices, notes, categories, monthly limits, and settings you create are stored locally on your device.

CostMe does not connect to your bank and does not operate an expense-sync service. If you export a JSON backup or CSV file, you choose where to save or share that file. CostMe does not receive a copy through the export feature.

3. Website information

The CostMe website can receive standard technical information needed to deliver a webpage, such as an IP address, browser type, device information, requested page, and date and time. The hosting provider may keep security and access logs for a limited period.

The website does not require an account and does not intentionally use your expense entries.

4. App stores and service providers

CostMe uses a small number of providers to operate purchases and diagnose technical problems:

  • Apple App Store and Google Play process downloads, payments, refunds, and store-account purchase history under their own policies.
  • RevenueCat helps verify in-app purchase status and may process an app-user identifier, product and transaction metadata, store, country or region, app version, and entitlement status.
  • Sentry helps identify crashes and technical errors and may process device model, operating-system and app versions, error details, performance information, and network or IP information. CostMe does not intentionally add your tracker names, notes, or expense records to diagnostic reports.

These providers process information under their own terms and privacy policies and may process it in other countries.

5. How information is used

Information is used to deliver app and website functionality, validate and restore purchases, prevent abuse, maintain security, diagnose crashes, respond to support requests, and comply with legal obligations.

6. Sharing and sale

CostMe does not sell your personal information and does not use your expense entries for behavioral advertising.

Information may be shared with the service providers described above, with a store when you make a purchase, when required by law, or to protect the rights, safety, and security of users and the service.

7. Retention and deletion

Locally stored app information remains on your device until you delete it, import a replacement backup, clear the app data, or uninstall the app. Backup and CSV files remain wherever you chose to save them until you delete them.

Support correspondence and provider records are retained according to operational, legal, security, and provider requirements. CostMe cannot directly delete records controlled solely by Apple, Google, or another provider; their privacy tools and policies apply.

8. Your choices

  • Edit or delete expense entries and trackers in the app.
  • Export a JSON backup or CSV file.
  • Choose whether to send a support email and what to include.
  • Disable optional diagnostics through device or platform controls where available.
  • Contact us to ask about information CostMe may control outside your device.

9. Children

CostMe is not directed to children under 13, and we do not knowingly collect personal information from children under 13. Local law may require a higher minimum age.

10. Security

We use reasonable administrative and technical safeguards appropriate to the service. No device, transmission, or storage system can be guaranteed completely secure. Protect your phone and any backup files you export.

11. Changes to this policy

We may update this policy as CostMe, its providers, or legal requirements change. The latest version and effective date will be posted on this page.

12. Contact

Email privacy questions to hello@costme.app.