Private by design. Simple by choice.
Open-source apps and games that respect you: no ads, no tracking, no data collection.
Most apps today want your data, your attention and your internet connection. We build the opposite.
| 🚫 No ads | Not now, not ever. |
| 🕵️ No tracking | No analytics, no trackers, no third-party SDKs spying on you. |
| 📴 Offline first | Our apps work fully without an internet connection. |
| 🔒 Your data stays yours | Everything stays on your device. We never see it. |
| 🔓 Open source | Every line of code is public. Read it, audit it, learn from it. |
| 🆓 Free | No accounts, no subscriptions, no paywalls. |
| App | What it does | Platform |
|---|---|---|
| 🧮 Calculator | A clean calculator with a scientific mode, unit converter (length, weight, temperature, area, speed) and an age/date calculator. | Android |
| 💰 PocketTally | An offline daily income and expense tracker. Available in many languages, with no wallets, no accounts and no cloud. | Android |
| 📄 Paperwise | Offline PDF tools: merge, split, compress and convert images to PDF. Your documents never leave your phone. | Android |
| 🛂 Stamply – Visa Checker | Check visa and passport requirements. Data is bundled in the app, with an optional manual data update and no login. | Android |
| 🎮 Pow2 | A simple, addictive swipe-and-merge number puzzle. Endless play, themes, sound and vibration options, and stats. Fully offline, no ads. | Android |
| 🧩 Cuboo | A relaxing block puzzle: place shapes, clear lines and beat your best score. Light and dark mode, smooth animations, scores and achievements saved on your device. Fully offline, no ads. | Android |
Find screenshots, details and privacy policies for every app on lumio-apps.online.
More privacy-first apps and games are on the way.
Our apps are distributed only through GitHub. There is no Play Store account and no middleman between you and the code.
- Open the app's repository from the table above.
- Go to Releases and download the latest signed
.apk. - Install it on your Android phone.
Every release is built from the public source code in this organization, and the apps can check GitHub for updates themselves.
- Privacy is the default, not a setting you have to find.
- The app should work without internet whenever possible.
- Simple and focused: each app does one job and does it well.
- Transparent: open code, honest permissions, no hidden behavior.
- Built for everyone: multi-language support and a clean, modern design.
Found a bug, have an idea or want to translate an app into your language? You're welcome here.
- 🐛 Open an Issue in the app's repository
- 💡 Suggest a feature in the repository's Issues
- 🌍 Send a Pull Request with a new translation or a fix
Please keep the spirit of the project in mind: no ads, no trackers, no data collection. Contributions that add any of these can't be accepted.
Apps are built with Flutter and Dart.