Privacy Policy
1. Introduction
datila (“we”, “our”, “us”) is a mobile application for learning the first few hundred words of a new language, explained in a language you already speak. It is available on Android and iOS and is intended for people aged 13 and older.
This policy explains what information the app collects, why, and what control you have over it. It applies to the datila mobile app and to datila.app.
Who is responsible for your data. The controller of the personal data described in this policy is [[LEGAL ENTITY NAME]], [[REGISTERED ADDRESS]], [[COUNTRY]]. You can reach us at support@datila.app.
datila requires an internet connection. Lessons, images, and audio are downloaded from our content servers as you use the app.
2. Your voice recordings never leave your device
datila has a speaking practice feature: you listen to a model, record yourself, and play your recording back to compare. That recording is written to temporary storage on your phone and is never uploaded anywhere. We do not receive it, store it, transmit it, or process it. It is deleted when you record again, leave the exercise, or close the app.
This is possible because datila does not score your pronunciation. Nothing needs to be sent anywhere, so nothing is.
3. Information we collect
Account information
- An anonymous account is created automatically the first time you open the app, so your progress can be saved before you decide whether to sign in. It contains no personal information.
- Sign-in with Google or Apple is required to continue beyond the first lesson and to make a purchase. When you sign in, we receive the account identifier and email address that the provider supplies. We never see or handle your password. If you use Apple’s “Hide My Email”, we only ever see the relay address.
Device and installation identifiers
- An installation ID — a random identifier the app generates on your device the first time it runs. It is not a hardware identifier, is not shared with other apps, is excluded from cloud backup and device transfer, and a new one is generated if you reinstall the app or delete your account. Because a new one is generated on deletion, activity after you delete your account is not linked to anything you did before it.
- Basic device and app information — app version, operating system version, device model, and language settings, used for compatibility and diagnostics.
Learning data
- Which languages you are learning, which lessons you have completed, your review schedule, and your app settings. This is stored on your device and synchronised to your account so it survives changing or resetting your phone.
Usage and diagnostics
- Analytics events describing how the app is used — for example that a lesson was started or finished, or that a download failed. These are tied to the installation ID, not to your name or email.
- Crash reports containing the state of the app when it stopped unexpectedly.
- Network information — our content delivery network sees your IP address when the app downloads lessons, images, and audio, as any web request does.
What we do not collect
Voice recordings (see section 2), precise location, contacts, photos, files, browsing history, biometric data, health data, or payment card details. We do not use advertising identifiers for cross-app tracking, and the app does not ask for App Tracking Transparency permission on iOS because it does not track you across other apps or websites.
4. Permissions the app asks for
| Permission | When it is asked | What happens if you say no |
|---|---|---|
| Microphone | Only when you tap the record button in speaking practice for the first time | You can listen to the model and continue the lesson normally. Nothing is blocked. |
| Notifications | After your first completed lesson, never before | You simply do not get review reminders. Nothing is blocked. |
| Internet | Granted at install; no prompt | — |
5. Advertising
datila is free to use and shows advertisements to free users. Ads are served by Google AdMob.
We serve non-personalized ads only. Ads are chosen from general context rather than from a profile of you, and we do not track you across other apps or websites for advertising purposes.
Where ads appear is limited by design, not by configuration. There are no ads:
- before your first completed lesson;
- in the first lesson of a language, ever;
- during a lesson, or after a wrong answer;
- before an explanation opens;
- in a session you opened from a review reminder.
If you are in the European Economic Area, the United Kingdom, or Switzerland, the app asks for your consent for ad-related identifiers and measurement through Google’s User Messaging Platform before any such data is used, and records your choice. You can review or change that choice at any time from Settings → Privacy options in the app.
If you do not consent, the app still works in full and you can still learn every lesson. Ads may still be shown, but without access to identifiers or on-device storage, which generally means fewer and less relevant ads.
Ad networks may process limited signals such as device type and the approximate region inferred from your IP address in order to deliver and measure ads and to detect fraud, under their own privacy policies. We do not sell your personal data, and we do not share it for cross-context behavioural advertising.
6. Purchases
You can remove ads by making a purchase. Each language course is purchased separately, once — buying an ad-free English course does not remove ads from a Japanese course. This is stated on the purchase screen before you buy, not after.
All payments are handled entirely by the Google Play Store or the Apple App Store. We never see or store your card details, billing address, or any financial information. We use RevenueCat to verify with the stores which purchases your account holds; RevenueCat receives your account identifier and the purchase receipt issued by the store.
7. Notifications
If you allow notifications, we send two kinds: a reminder when words you have learned are due for review, and occasional reminders to come back if you have stopped using the app. You can turn them off at any time in your device settings or in the app.
8. How we use your information, and on what legal basis
If you are in the European Economic Area, the United Kingdom, or Switzerland, we must tell you the legal basis on which we process your data. This is that list.
| What we do | Why | Legal basis |
|---|---|---|
| Run the app: save your progress, schedule reviews, deliver lessons | This is the service you asked for | Performance of a contract |
| Keep your progress when you change or reset your device | Same | Performance of a contract |
| Confirm which purchases your account holds | To give you what you paid for | Performance of a contract |
| Diagnose crashes and errors | To keep the app working | Legitimate interests |
| Detect abuse of our servers | To keep the service available and affordable | Legitimate interests |
| Understand which parts of the app work and which do not | To improve the app | Your consent |
| Show and measure advertisements to free users | This is what makes the app free | Your consent |
| Send review reminders | So you can come back before you forget | Your consent |
We do not sell your personal data, and we do not share your learning data with advertisers.
9. Analytics and your consent
Analytics collection is switched off by default when the app starts. In the European Economic Area, the United Kingdom, and Switzerland, no analytics event is recorded or sent unless you have given consent, and events that occurred before you consented are discarded rather than sent later. If you withdraw consent, anything still waiting to be sent is deleted and is never sent afterwards.
Outside those regions, analytics events are collected as described in section 3 without a separate consent prompt, and you can still ask us to delete your data as described in section 11.
10. Third-party services
| Service | What it does for datila | Policy |
|---|---|---|
| Firebase Authentication | Anonymous and Google/Apple sign-in | Firebase |
| Cloud Firestore | Stores your learning progress | Firebase |
| Firebase Analytics | Usage analytics | |
| Firebase Crashlytics | Crash reporting | Firebase |
| Firebase Cloud Messaging | Review reminders | Firebase |
| Firebase Remote Config & App Check | Feature switches and abuse prevention | Firebase |
| Google AdMob | Non-personalized advertising | |
| Google User Messaging Platform | Asks for and records your advertising consent in the EEA, UK, and Switzerland | |
| RevenueCat | Verifying purchases with the stores | RevenueCat |
| Cloudflare | Delivering lessons, images, and audio | Cloudflare |
| Google Play / Apple App Store | Payments | Google · Apple |
11. Your choices, your rights, and how to delete your data
What you can do in the app
- turn review reminders off, in the app or in your device settings;
- review or withdraw your advertising and analytics consent, where consent applies, from Settings → Privacy options;
- uninstall the app, which removes everything stored on the device.
Deleting your account
You can delete your account from inside the app: Settings → Delete account. We delete your sign-in record, your learning progress, your review schedule, and your saved settings together, and the app returns to a clean state with a new installation ID. Deletion is permanent and cannot be undone.
If you can no longer open the app, email us at support@datila.app from the address you signed in with and we will do it for you.
Your rights
Depending on where you live, you have rights to access, correct, export, delete, or restrict the use of your personal data, to object to certain processing, and to withdraw consent at any time — for example under the GDPR, the UK GDPR, the Swiss FADP, or the CCPA/CPRA. Withdrawing consent does not affect processing that already happened while consent was in place.
Write to support@datila.app and we will respond to verified requests within one month. We will not treat you differently for exercising any of these rights.
If you are in the European Economic Area, the United Kingdom, or Switzerland and you think we have handled your data wrongly, you also have the right to lodge a complaint with your national data protection authority. You do not have to contact us first, though we would rather you did.
12. How long we keep things
| Data | Kept for |
|---|---|
| Voice recordings | Never leave the device; deleted when you re-record, leave the exercise, or close the app |
| Account and learning progress | Until you delete your account |
| Data stored on your device | Until you delete it or uninstall the app |
| Analytics events | According to the retention period configured in Firebase Analytics |
| Crash reports | 90 days (Firebase Crashlytics) |
| Purchase records | As required for tax and consumer-protection law |
13. Children’s privacy
datila is intended for people aged 13 and older, and is not directed at children. We do not knowingly collect personal information from children under 13, or under the age of digital consent where that age is higher. If you believe a child has provided us with personal information, write to us and we will delete it promptly.
14. International transfers
The services listed in section 10 operate globally, so your data may be processed outside the country you live in, including in the United States. Where data leaves the European Economic Area, the United Kingdom, or Switzerland, these transfers rely on the European Commission’s Standard Contractual Clauses, on the EU–US Data Privacy Framework and its UK and Swiss extensions where the provider is certified, or on an adequacy decision — as set out in each provider’s own privacy documentation linked in section 10.
15. Changes to this policy
We may update this policy. When we do, the “last updated” date at the top changes, and significant changes are announced in the app. Continuing to use datila after a change means you accept the updated policy.
16. Contact
[[LEGAL ENTITY NAME]]
[[REGISTERED ADDRESS]], [[COUNTRY]]
Email: support@datila.app
Website: https://datila.app