About Radon Developer
Apps Built for Real People
Productivity tools, readers, finance apps, and utilities — crafted with care by a solo indie developer in India.
No bloat. No dark patterns. Just tools that work. Every app is free, offline-first, and respectful of your privacy.
⭐ featured app
Scribu — Private Notes & Vault
Your most private thoughts, locked away safely. PIN & fingerprint protected notes that never leave your device.
All apps
Browse the collection.
9 apps found
Calculator Pro
All-in-one calculator with scientific, financial, and unit conversion modes. Beautiful glassmorphic design with full calculation history.
Scribu — Notes & Vault
Private encrypted notes with vault protection. PIN and fingerprint lock. Your notes never leave your device.
Folium Reader
Clean, distraction-free EPUB and PDF reader with bookmarks, night mode, and adjustable fonts.
Khasra Khatauni
Instantly access land record information (Khasra, Khatauni, Bhunaksha) for UP and other Indian states.
MoneyMind
Track EMIs, monthly expenses, and budgets in one place. Visual charts, loan calculators, and offline-first finance.
Vyapar Calculator
Business-grade calculator for traders and entrepreneurs. GST calculations, profit/loss, and markup tools built in.
Mo: Habit Tracker
Build lasting habits and keep a private journal. Daily streaks, reminders, and mood tracking in one beautiful app.
DocView Pro
Open any document instantly — Word, Excel, PowerPoint, PDF, and more. Lightweight and no account required.
Flick Fury Arrows
Fast-paced archery action game. Test your reflexes, shoot targets, and become the ultimate bowmaster.
About us
One Developer, Real Impact
Radon Developer is a solo indie developer based in India, building practical apps for everyday problems. Every app is designed to be fast, offline-first, and respectful of your privacy.
No bloat. No dark patterns. Just tools that work. From calculators to habit trackers, from document viewers to finance managers — each app solves a real need with care.
Privacy First
Your data stays on your device. No accounts, no cloud sync unless you choose.
Works Offline
Most apps work fully without internet. No connectivity required for core features.
Always Free
All apps are free to download. Supported by non-intrusive ads, not paywalls.
Made in India
Designed for Indian users, with Hindi support and local data like land records.
Contact
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Have a question, feedback, or just want to say hello? We'd love to hear from you.