One Machine a Day — Privacy Policy
Store name by language: EN One Machine a Day · PT Uma Máquina Por Dia · ES Una Máquina al Día · FR Une Machine par Jour · IT Una Macchina al Giorno · DE Eine Maschine am Tag. Same app, same policy.
Last updated: 3 October 2026 · Publisher: Kodalab (Joel Gomes) · Android applicationcom.kodalab.maquina
What stays on your device
Your progress (solved puzzles, stars, the machines you built, hints seen, the daily machines and your daily streak), your settings and the time of the last ad are stored on the device only. There are no accounts, and no servers of ours receive gameplay data apart from the optional world ranking described below. Uninstalling the app, or "Delete data" in Settings, deletes them.
What leaves your device
- Once a day the app downloads the public list of other Kodalab apps (kodalab.pt). The request carries no identifier.
- Share codes are only sent where you choose to share them, through Android's share sheet. A code contains the puzzle and the parts of your machine (the solution), nothing else. The text that goes with it, shown to you before sending, adds the number of parts and tests, your streak and the store link.
- Only if you ask for it: after you solve the daily machine, the app offers the world ranking. If you choose a name (up to 16 characters) instead of "Not now", it sends that name, the score, the date, a timestamp and a random identifier created on your device to kodalab.pt. Viewing the ranking sends only that random identifier and the date. Our server keeps IP addresses only as a salted, truncated hash, to limit abuse. No account, no e-mail, no contacts, no location.
- Ads and the consent form are loaded from Google (see below).
Advertising
The app is free and shows ads through Google AdMob: a banner, a full-screen ad at most between puzzle sets, and rewarded ads only when you tap a button to get a hint — never automatically, never required to progress. In the EEA and UK you are asked for consent through Google's form first, and you can change it in Settings ("Ad privacy options"). AdMob may use the Android advertising id to serve and measure ads; you can reset or delete it in Android settings. See how Google uses data in ads.
Notifications
A daily reminder is only scheduled if you say yes (offered after the first set, never at first launch). It is a local notification created on the device; you can turn it off in Settings.
Reviews
After a few good sessions the app may ask Google Play to show its rating dialog. Google Play decides whether it appears; the app never sees your rating.
Purchases
There are no purchases in this app.
Children
The app is not directed at children under 13 and does not knowingly collect personal data from them.
Your rights
Everything the app stores is on your device: "Delete data" in Settings or uninstalling removes it. The only data about you on our server is your ranking entry, if you joined the world ranking; to delete it, e-mail joel.gomes@kodalab.pt with the name shown on the ranking. For data processed by Google for ads, use "Ad privacy options" in Settings, your Android ad settings, or Google's tools linked above.