Tarrina — Privacy Policy
Last updated: October 31, 2026
This policy explains what data Tarrina ("the app") handles. The app is published by Yabin Alejandro Lagunes Cuevas, trading as The Alchemist Code ("we"), who is responsible for your data. Contact: [email protected].
The short version
- There is no account. We never ask for your name, email or password.
- Your shifts, tips, jobs, notes and settings are stored only on your device. We do not upload them anywhere and we don't run a server that stores them.
- The app does not use your location, contacts, camera, photos or microphone.
- The app shows a banner ad only on the History and Reports screens and, at most, one full-screen ad after you add a new job (never in your first week, never on the Today screen and never while you log a shift), and an optional video ad if you choose to unlock the full insights once. It also uses analytics and crash reporting. Those services, run by Google, collect some technical data, described below.
Data stored on your device
The shifts you log (date, job, shift type, hours, cash and card tips, tip-outs, and optionally sales, hourly wage and a note), your jobs (name, hourly wage and color), your weekly goal, your reminder and your settings (currency, first day of the week). They stay on your phone. The amounts are what you type; the app does not connect to your bank, payroll or any delivery or point-of-sale app.
- CSV export and backup file: the app creates them only when you ask. You decide where to save them and who to share them with. We never receive them.
- Android backup: if backup to your Google account is turned on in your phone's settings, Android may include the app's data in your device backup so it comes back when you move to a new phone. Android makes that backup and stores it encrypted in your Google account. We have no access to it.
You can erase everything at any time in Settings › Delete all my data. Uninstalling the app also removes it from the phone.
Data collected by third-party services
| Service | What it collects | Why |
|---|---|---|
| Google AdMob (ads) | IP address (used to estimate approximate location), Android advertising ID and app set ID, interactions with ads and the app, performance diagnostics | Showing ads, measuring them, preventing fraud |
| Google Analytics for Firebase | App-instance ID, advertising ID, approximate location derived from a masked IP address, screen views, sessions and purchase events | Understanding how the app is used |
| Firebase Crashlytics | Crash stack traces, device metadata at the time of a crash, app state, an installation identifier | Finding and fixing crashes |
| Firebase Remote Config | Country, language, time zone, OS and app version | Adjusting app settings remotely |
| Google Play Billing | Payment details and your purchase | Processing your Premium subscription or one-time purchase (we never see your card) |
None of these services receives your shifts, tips, jobs or notes. All of this data is encrypted in transit. Each provider handles it under its own privacy policy:
- Google: https://policies.google.com/privacy
- How Google uses data from apps that use its services: https://policies.google.com/technologies/partner-sites
Your choices
- Ad personalization (EEA, UK, Switzerland): the app asks for your consent before showing personalized ads, and you can change your choice anytime in Settings › Ad privacy options.
- Advertising ID: you can reset or delete it in your Android settings under Privacy › Ads.
- Notifications: the app sends the daily reminder to log your shift only if you turn it on in Settings, and the reminder five days before each renewal if you take out a subscription. It asks for the permission only then. You can deny it and still use everything, or revoke it anytime in your phone's settings.
- Premium removes all ads.
Your rights
You can ask us about your data or to delete it by writing to [email protected]. Because the app has no account and your data stays on your phone, we hold nothing that identifies you; deleting your data in the app removes it for good.
Children
The app is not directed at children under 13 and we do not knowingly collect data from them.
Changes
If this policy changes, the new version will be posted at this address with an updated date.
Contact
Yabin Alejandro Lagunes Cuevas (The Alchemist Code), Mexico · [email protected]