Independent app studio
Sunstone Apps builds mobile puzzles and everyday tools for people who want to open an app, do one thing, and come back later without friction.
Sunstone Apps is intentionally small. Each app has to earn its place: it should start quickly, save progress clearly, and avoid turning a simple break into setup work. Daily Sudoku covers offline number puzzles. Future apps only move forward when they are ready to be measured and supported.
Send selected code or file references to the OpenCode terminal from VS Code with a single shortcut. Bridges the editor to AI-assisted development without copy-paste.
→
Offline Sudoku with daily challenges, flexible mistake rules, hints, and progress saved automatically.
→Behind-the-scenes decisions from building, publishing, and operating mobile games and everyday apps.
Written by: Jonathan Reis on
Build one analytics contract for an Expo app, keep Firebase and GA4 working, add Amplitude without rewriting product code, and gain independent rollout, failure isolation, and better product decisions.
Written by: Jonathan Reis on
Pass one UTM campaign from an institutional site to an app landing page, Google Play, and Android's Install Referrer without joining people across analytics projects.
Written by: Jonathan Reis on
Configure Google's official Analytics MCP in OpenCode, authorize ADC access, and turn repeated GA4 questions into reproducible reports.
Written by: Jonathan Reis on
A practical asset-library pattern for React Native apps, static sites, store exports, and shared audio without losing the editable original.
Sunstone Apps is led by Jonathan Reis, a senior tech lead and software developer from Rio de Janeiro. The same hands-on work behind mobile apps, cloud infrastructure, DevOps, SRE, and release reliability shows up here in smaller products with tighter feedback loops.
Sunstone Apps