Grisú Studio LLC
Utility Apps and Casual Games for iPhone and Android
Grisú Studio makes about 60 apps and games for iOS and Android: a QR code maker, a debt payoff planner, daily Stoic quotes, emoji quizzes and more. Free to download, with fair ads, and your data stays on your device.
Our Featured Apps
A few of the utility apps and games in our catalogue
Color Streak
Feed Hue its exact twin as the shades creep closer. How many in a row can you match?
- IOS
- ANDROID
Aubade
One line a day, on paper and on your home screen.
- IOS
- ANDROID
Five Facts
Five facts a day. One is fake. Spot it, keep the streak, earn the badges.
- IOS
- ANDROID
Saymoji
Guess the phrase hidden in the emoji. A new rebus every day, streaks with freezes, levels and badges.
- IOS
- ANDROID
Valise
The plan, the map and the money of a trip, in one suitcase on your phone.
- IOS
- ANDROID
Quadrille
QR codes as design objects: style them, scan them, keep them.
- IOS
- ANDROID
What We Do
We design, build and ship our own iOS and Android apps end to end: the code, the icons and screenshots, the store listings and the privacy policies published on this site.
Mobile First
Each app is one TypeScript codebase built with Expo and React Native, shipped to both the App Store and Google Play. Some of our games are built in Godot.
Fun Experiences
Utility apps that do one job well and casual games with a daily challenge, all usable without creating an account.
Private by Default
No accounts and no servers of our own: what you save stays on your device. Ads come from Google AdMob, and you choose what you consent to.
Our Tech Stack
The tools behind our apps and games, from the first line of code to the store listing and this website.
- Expo
- React Native
- TypeScript
- Godot
- Google AdMob
- SQLite
- Reanimated
- Skia
- Zustand
- Vitest
- pnpm
- Xcode
- Android Studio
- Figma
- Blender
- Astro
- Cloudflare
- GitHub
Latest from Our Blog
Notes on how we build, ship and host our apps
How We Build and Deploy grisu.co: Astro on Cloudflare Workers
The setup behind grisu.co: Astro builds every page in five languages to static HTML, Cloudflare Workers serves it from the edge, and a merge to master is the whole deploy. Here is the config, and the reasons behind each line.
Grisú Studio Why We Build Our Mobile Apps with React Native and Expo
How a small studio ships dozens of utility apps on React Native and Expo: one skeleton every app shares, strict TypeScript, pure logic covered by tests, native config kept in app.json, and release builds made locally with Xcode and Gradle.
Grisú Studio Need an App Built?
We take apps from idea to a published App Store and Google Play listing, with store screenshots and a privacy policy included. Tell us what you have in mind.