← OneLet

Privacy Policy

Last updated: 23 October 2026

OneLet is available on the Apple App Store (iPhone and iPad) and on Google Play (Android). This policy covers both. Where the two platforms differ, the difference is stated.

1. What OneLet Does

OneLet is a word puzzle game. You change one letter at a time to turn one word into another. Every puzzle is generated in advance and shipped inside the app, so the game itself works with no internet connection. The only parts that use the network are advertising, purchases, the platform services described in section 5 (on iOS: iCloud and Game Center; on Android: Google Play Games and Android backup), and a time check described below.

Time check. So that daily rewards follow the real date, the app reads the current time from the response header of our own website (karayelgames.me, hosted by GitHub Pages). It sends no data of its own — no identifier, no progress, nothing about you. Like any web request it reaches the host with your IP address, which GitHub may log under its own privacy statement; we do not receive or use it.

2. Information We Collect

We collect nothing. We have no server, no account system and no login. The app never sends your progress, your words, or anything else to us. We cannot see how you play, and we could not identify you if we tried.

The app contains no analytics SDK, no crash-reporting SDK and no social-media SDK. It does not access your contacts, photos, camera, microphone or location.

3. Advertising

OneLet is free to play and is supported by advertising provided by Google AdMob. There are three kinds of ad:

• Rewarded videos — always your choice. You only see one by tapping a button that offers a reward (for example gold or a tool) in exchange. Nothing in the game is locked behind one.
• A banner at the bottom of the screen, from level 6. It is never shown on the store or purchase screens.
• Interstitial ads between levels, from level 8 — at first once every few levels. They never interrupt a puzzle while you are playing it.

The first five levels show no banner or interstitial ads. All ads are limited to content suitable for a general audience.

To serve those ads, Google's advertising software collects information from your device. Depending on your settings this can include advertising identifiers, your IP address, device and operating-system details, and interaction data such as whether an ad was viewed or completed. This processing is carried out by Google, not by us, and is governed by Google's own policies:

• How Google uses information from sites or apps that use its services
• Google Privacy Policy

On iOS, before any tracking takes place, the app shows a short explanation and then the system asks for your permission through Apple's App Tracking Transparency prompt. If you decline, you can still play the entire game and still watch rewarded ads — the ads are simply not personalised. Declining costs you nothing in this app.

On Android, Google's advertising software may use your device's advertising ID. You can reset it or delete it at any time in Android Settings → Privacy → Ads (the exact path depends on your device). Without it, ads are not personalised and the game works exactly the same.

If you are in the European Economic Area, the United Kingdom or Switzerland, the app asks for your consent before any ad is requested, using Google's consent message (a certified consent tool under the IAB Transparency & Consent Framework). You can Consent, Do not consent, or Manage options for each purpose and partner — refusing is as easy as accepting. If you do not consent, you still see ads and can still watch rewarded videos, but they are limited and not personalised. On iOS, Apple's tracking prompt is only shown afterwards, and only if you consented.

In US states with consumer privacy laws, you can opt out of the sale or sharing of your personal information for advertising.

Wherever these choices apply, you can change them at any time in Settings → Ad privacy choices. Your choice is stored on your device only; if you reinstall the app or use another device, you will be asked again.

If you would rather not see banner and interstitial ads, the app offers a one-time purchase that removes them. See section 6.

4. What Is Stored on Your Device

The app saves a small amount of data locally, using the operating system's standard app storage, so it can remember where you are between sessions:

• your progress — which levels you have finished and how many stars each one earned, a level you left half-finished, and whether today's daily puzzle is solved;
• your gold — the in-game currency — and the tools you own;
• your settings — language, sound, music and haptics;
• a few small flags — which tutorials have been shown, whether a permission request has been answered, whether today's wheel spin, gift box and daily pack have been used, and which purchases are active on this device;
• a few device-only measurements — the times of day you usually open the game (so the daily reminder arrives at a sensible hour) and whether your device needs the lighter graphics mode. These never leave the device.

This is a few kilobytes of text. We cannot read it, retrieve it, or recover it for you.

5. Platform Services

On iOS (Apple):

iCloud. If you are signed in to iCloud, the app keeps a copy of your progress, gold, tools and settings (section 4) in your own iCloud account, so they follow you to a new device. This copy is stored by Apple under your Apple ID; we have no access to it. You can turn it off in iOS Settings → your name → iCloud.

Game Center. If you use Game Center, your total score is sent to Apple's Game Center leaderboard under your Game Center profile and may be visible to other players according to your Game Center settings. This is Apple's service and is governed by Apple's Privacy Policy.

On Android (Google):

Google Play Games. If you are signed in to Google Play Games, the app keeps a copy of your progress, gold, tools and settings (section 4) as a saved game in your own Google account, so they follow you to a new phone. Your total score is also sent to the Google Play Games leaderboard under your Play Games profile and may be visible to other players according to your Play Games settings. This is Google's service and is governed by the Google Privacy Policy; we have no access to it.

Android backup. If backup is turned on for your Google account, Android may also include the game's data in its own device backup. This copy is stored by Google under your Google account; we have no access to it. You can turn it off in Android Settings → Google → Backup.

6. Purchases

Optional purchases are available: gold packs, the Journey Pack, a one-time purchase that removes banner and interstitial ads, and the Summit Pass subscription. Payment is handled entirely by the store you installed the app from — Apple through the App Store, or Google through Google Play Billing. We never see your name, your card details or your billing address. The app only stores which purchases are active.

If you reinstall the app or change device, use Restore purchases in Settings. You will not be asked to pay twice. Purchases belong to the store account they were made with: a purchase made on the App Store cannot be restored on Google Play, and the other way round.

Subscriptions are managed and cancelled in the store: on iOS in Settings → your name → Subscriptions; on Android in the Play Store → Payments & subscriptions → Subscriptions.

The ad-removal purchase does not remove the optional rewarded videos — those are a trade you choose to make, and taking them away would punish you for paying.

7. Notifications

If you allow notifications, the app can remind you, at most once a day, that a new daily puzzle is ready. These are local notifications, scheduled by your own device during daytime hours only. There is no push server, so no message about you ever leaves your phone. You can turn them off at any time in your device's settings (iOS Settings or Android Settings → Apps → OneLet → Notifications).

8. Children

OneLet is suitable for all ages and does not knowingly collect personal information from anyone, including children. Because the app shows advertising supplied by Google, all ads are restricted to content suitable for a general audience, and ads are personalised only where the law and your own settings (consent, App Tracking Transparency, Android advertising ID) allow it. If you are a parent or guardian and have a question about this, please write to us.

9. Data Retention and Deletion

We hold no data, so there is nothing for us to retain or delete. Everything the app stores lives on your device and in your own iCloud account or Google account, and you control it completely:

• Settings → Delete your data starts the game over: it erases your level progress and stars, any half-finished level and the tutorials, on this device and in your backup copy. Your gold, tools, settings and purchase records are kept, so nothing you earned or paid for is lost;
• deleting the app removes all of its data from this device; a backup copy in iCloud or your Google account stays under your control in that account, and purchases can be brought back with Restore purchases.

To ask Google to delete data collected through advertising, use the links in section 3; that data is held by Google, not by us.

10. Your Rights

Data-protection law gives you rights of access, correction, deletion and objection. These rights are exercised against whoever holds your data. We hold none, so there is nothing to request from us. For data collected by Google's advertising services, contact Google using the links in section 3; for iCloud and Game Center, contact Apple; for Google Play Games and Android backup, contact Google.

11. Changes to This Policy

If the app changes in a way that affects this policy, we update this page and change the date at the top. Continuing to use the app after a change means you accept the updated policy.

12. Contact

Questions about privacy, or anything else: contact@karayelgames.me. We read every message.