Last updated: 2026-11-13. In effect from the release of Gemlign 1.0.
1. Who these terms are between
These terms are between you and Mehmet Aktug, trading as Lumina Studio ("we", "us"), the publisher of Gemlign for iPhone ("the app"). By downloading or using the app you agree to these terms. If you do not agree, do not use the app.
Contact: support@luminastudio.ai. Website: gemlign.luminastudio.ai
2. Who may use the app
The app is for people 13 and older. If you are under 13, do not use it.
If the law where you live sets a higher age to use an app like this, you need to meet that age or have a parent or guardian agree for you. If you are under the age of legal majority where you live, ask a parent or guardian before making any purchase.
The app does not ask your age and does not check it.
You also need to follow Apple's terms for your Apple account and the App Store.
3. Use of the app
We give you a personal, non-exclusive, non-transferable license to install and use the app on iPhones that you own or control, for your own non-commercial use.
Do not copy, modify, reverse engineer or resell the app, remove its notices, or use it to harm others or the services it relies on.
Do not try to get around the way ads or purchases work, and do not use cheats, bots or tools that interfere with the app or its stores.
The app works offline and without an account. Your progress, gems, helpers, stats and settings are stored on your device. If you delete the app or use Delete data, they are removed and we cannot restore them. Version 1 has no cloud backup of our own.
The content of the app (levels, art, text, design and sounds) belongs to us or our licensors. Levels can be played; they may not be republished at scale.
We may update the app, remove features and change levels or events. We will try to keep this from harming your purchases.
4. Virtual items (gems and helpers)
Gems and helpers (Hint and extra tube) are virtual items inside the app. They have no cash value, cannot be exchanged for money or other items, and cannot be transferred to other people.
Undo is free and has no limit. Helpers are used up when you use them.
Gems you buy do not expire. You also get free gems (for example from the daily reward) and can earn more by watching optional rewarded videos, by winning levels and by collecting jewels. Free and earned amounts follow fixed limits shown in the app, and those limits may change.
Gems and helpers are stored on your device. Restore purchases does not bring back items that were already paid out, and they may not come back after you reinstall the app. Delete data removes them. Back up your device if you want to keep them.
Nothing in the app is sold as a chance. Every pack gives a fixed amount.
5. Purchases and refunds
Items for sale (prices are shown in the App Store sheet, in your currency):
- Remove ads (one-time purchase), also offered as part of a bundle
- Gem packs and helper bundles (consumable)
- A starter pack (one-time purchase)
- A gem jar that pays out the gems saved in it (consumable)
- The gold track of the monthly Jewel Pass (valid for that month only, not a subscription and not renewed automatically)
All purchases are made through the Apple App Store. Apple collects payment, handles billing problems and decides refunds. We do not see your card or Apple ID details and we cannot refund a payment ourselves.
To ask for a refund, use Apple's refund process. If Apple refunds a purchase, the app removes the matching item where it can.
Restore purchases brings back Remove ads and other one-time purchases on a device signed in with the same Apple account. Consumables, and Jewel Pass months, are not restored.
If you are in a region where you have a legal right to withdraw from a digital purchase, that right is handled by Apple's process.
Prices can change. A price change never affects something you have already bought. The price on the App Store sheet is the price you pay.
6. Ads and rewards
The app is free to download and is supported by ads from Google AdMob. The first levels have no full-screen ads.
Full-screen ads can appear between levels, never while you play a level. There are no banner ads. Rewarded videos are optional.
A rewarded video tells you what you get before it starts. You get the reward only after the video is completed. If you close it early, or it fails to load, you do not get the reward. You never have to watch one to play.
Remove ads removes the full-screen ads. It does not remove optional rewarded videos, and it does not remove anything else.
Ads come from third parties. We are not responsible for the products or content of advertisers, but you can report an ad by writing to support@luminastudio.ai.
How ads use your data is described in the Privacy Policy: gemlign.luminastudio.ai/privacy
7. Privacy
Our Privacy Policy explains what the app collects and your choices. It is part of these terms. The links to the Privacy Policy, these terms and support open in your phone's web browser, not inside the app.
8. Daily rewards and the Jewel Pass
Daily rewards, streaks, the Jewel Cabinet and the monthly Jewel Pass are provided for fun. Dates are based on the date on your device, and we may change or end them.
9. Availability
The app needs iOS 15 or later on an iPhone. We may stop offering the app in some countries or regions.
Levels work without a connection. Ads, purchases and restoring purchases need an internet connection.
We try to keep the app running, but it may be unavailable at times, for example for fixes.
10. Subscriptions (not part of this version)
A paid subscription is not part of version 1.0. No part of the app needs one. If a subscription is added in a later version, its price, billing period, renewal and cancellation terms will be shown before you subscribe, and they will be added to these terms.
11. Warranty disclaimer
The app is provided "as is" and "as available", without promises that it will be error free, uninterrupted or fit for a particular purpose, to the extent the law allows.
12. Limit of liability
To the extent the law allows, we are not liable for indirect or consequential losses, lost data (including lost progress, gems or helpers from deleting the app, device loss or device failure), or lost profit, and our total liability for the app is limited to the amount you paid us through the App Store for the app in the 12 months before the claim. Nothing in these terms limits liability that cannot be limited by law (for example for death or personal injury caused by negligence, or for fraud) or your mandatory consumer rights.
13. Ending your use
You can stop at any time by deleting the app. We may suspend or end your access if you break these terms. Sections that by their nature should continue (for example 3, 11 and 12) continue after that.
14. Apple
These terms are between you and us, not Apple. Apple is not responsible for the app or its content, maintenance or support. Apple's standard licensed application end user license agreement applies to the app as well, and these terms add to it. If the two disagree about something Apple's agreement covers, Apple's agreement comes first.
15. Governing law and disputes
These terms are governed by the law of Turkey, and the courts of Istanbul have jurisdiction. This does not remove the mandatory consumer protection rights of the country where you live, and nothing here stops you from using courts or authorities in your own country where you have that right.
16. Changes to these terms
We may change these terms when the app or the law change. We will update the "Last updated" date and publish the new version at gemlign.luminastudio.ai/terms. If you keep using the app after a change that matters, you accept the new terms; if you do not agree, stop using the app.
17. Contact
Questions about these terms: support@luminastudio.ai
Mehmet Aktug, trading as Lumina Studio. Website: gemlign.luminastudio.ai