Building Stack privacy
Last updated 10 November 2026
- Building Stack has no account, no ads, no analytics and no tracking.
- Your best score and settings stay on your phone. We never receive them.
- The game works fully offline and does not ask for any permission.
Who we are
Building Stack is a game by Mochi Studio, an independent app studio based in Spain. For anything about this policy, write to hello@mochistudio.dev.
What the game keeps, on your phone only
Building Stack saves your best score, how many games you have played, your sound and vibration settings and the colour theme you picked. Themes you unlock are worked out from your best score.
All of this lives in the app's private storage on your phone. The game has no server and sends none of it to us or to anyone else, so we have no copy of your data.
Permissions and third parties
Building Stack does not use the internet, location, contacts, camera, microphone or files. It contains no advertising or analytics code and no third-party tracking.
Deleting your data
Clearing the app's storage, or deleting the app, removes everything it stored.
Legal basis
Because Building Stack keeps everything on your phone, we do not process your game data at all. If you email us, we use your message to answer you, based on our legitimate interest in replying, and keep it only as long as the conversation needs.
Your rights
You can ask us to access, correct or delete your data, or object to how we use it, by emailing hello@mochistudio.dev. If you are not happy with our answer, you can complain to the Spanish data protection authority, the AEPD.
Children
Building Stack has no ads, no accounts, no chat and no purchases, but it is not specifically directed at children under 13.
Changes
If this policy changes, we will update the date at the top.