Our Services
We focus primarily on mobile app development for our own products, but we're open to helping you build your dream app.
Our Primary Focus
At Grisú Studio, we're primarily focused on building and growing our own mobile applications. Our catalogue runs to about 60 utility apps and casual games for iPhone and Android, including Aurelius (daily Stoic quotes), Quadrille (a QR code scanner and maker), Saymoji (an emoji guessing quiz) and Paid in Full (a debt payoff planner).
Shipping our own apps keeps us honest: every one has to pass App Store and Google Play review, carry a privacy policy that matches what it really does, and keep working after each OS update. That is the experience we bring to client work.
What We Specialize In
Mobile App Development
- React Native with Expo
- iOS and Android applications
- TypeScript for type safety
- Release builds ready for both stores
- Privacy-first approach
App Categories
- Utility applications
- Casual and hyper-casual games
- Health and wellbeing tools
- Personal finance and productivity
- Daily quizzes and word games
Open to Client Projects
While our primary focus is internal app development, we're open to helping with your mobile app needs. We can help with:
New App Development
From an idea to a published app on the App Store and Google Play, built with Expo and React Native.
App Reimplementation
Rebuild an ageing or hard-to-maintain app in Expo and TypeScript, keeping its store listing and its users.
App Improvements
Enhance your current app with new features, bug fixes, or performance optimizations.
Interested in working together? Contact us at support@grisu.co to discuss your project.
Our Technology Stack
Apps and games
- React Native + Expo
- TypeScript (strict)
- expo-router
- Zustand + expo-sqlite
- Godot 4
Web and backend
- Astro
- Cloudflare Workers
- TypeScript (Node.js)
- REST APIs
- Type-safe contracts
Shipping
- Release builds with Xcode and Gradle
- Typecheck, lint and tests before every release
- AdMob with GDPR consent and App Tracking Transparency
- App Store and Google Play listings
Why Work With Grisú Studio?
Real-World Experience
We build, ship and maintain our own catalogue of about 60 apps, so we know what App Store and Google Play review actually checks.
Modern Tech Stack
Expo, React Native and strict TypeScript, with every change passing typecheck, lint and tests before it ships.
Privacy Focused
We believe in user privacy and build apps that respect user data from the ground up.
Quality First
Every app ships with real store screenshots, a store listing and a privacy policy that matches what the app actually does.
Have a Project in Mind?
Whether you need a new app built, an existing app reimplemented, or improvements to your current application, we're here to help.
Email us at support@grisu.co to discuss your project