PRODUCTIVITY · 2025
CalcOS
Universal calculator and converter mobile app — 80+ calculators across 11 categories (finance, health, math, engineering, daily utilities). Offline-first, React Native + Expo, freemium with one-time unlock. Designed to replace every other calculator app on the phone.
Role
Founder, Sole Designer & Sole Developer
Timeline
2025
Platforms
iOS, Android
Tools
Figma, React Native
Overview
Universal calculator and converter mobile app — 80+ calculators across 11 categories (finance, health, math, engineering, daily utilities). Offline-first, React Native + Expo, freemium with one-time unlock. Designed to replace every other calculator app on the phone.
Highlights
Productivity
Minimal, focused UI that removes friction from repeated tasks.
Utility
Broad-utility tool designed for daily, habitual use by non-specialists.
Mobile
Designed for thumb reach, one-handed use, and variable connectivity.
React Native
Cross-platform mobile built for native feel with shared code base.