I Built Toolnic An All-in-One Offline Utility App for Android

Sameer Singh — Mon, 20 Jul 2026 12:45:38 +0000

As a developer, I found myself installing separate apps for simple tasks like generating QR codes, formatting JSON, converting units, creating strong passwords, or reading PDFs. It felt unnecessary.

So I decided to build Toolnic.

What is Toolnic?
Toolnic is an all-in-one Android utility app that brings together dozens of everyday tools in one clean, fast, and offline-friendly experience.

Instead of switching between multiple apps, you can access everything from a single place.

Current Features
📄 PDF Tools
🔐 Password Generator
📱 QR Code Generator & Scanner
📋 JSON Formatter
📏 Unit Converter
🎨 Color Tools
🔢 Calculators
📝 Text Utilities
📂 File Utilities
And many more...
Why I Built It

The goal wasn't just to create another utility app.

I wanted to build a lightweight toolkit that developers, students, and professionals could rely on every day without dealing with unnecessary complexity.

Tech Stack
React Native
Expo
TypeScript
Offline-first architecture
Modern Material UI
What's Next?

I'm actively adding new utilities based on user feedback. Upcoming features include:

AI-powered PDF summarizer
Smart reminders
Expense tracker
Vocabulary and language tools
More productivity features
I'd Love Your Feedback
Try Toolnic

Google Play: https://play.google.com/store/apps/details?id=com.toolnic.app
Website: https://toolnictools.vercel.app/
Follow the journey: https://www.linkedin.com/company/athenura

Which utility do you use most often?
What feature would you like to see added?
Any UI/UX suggestions?

Every suggestion helps make Toolnic better.

Thanks for reading! 🚀

ATH Hackathon 2026: Build, Innovate, and Compete with the Brightest Minds

Sameer Singh — Fri, 29 May 2026 03:43:50 +0000

Technology is evolving faster than ever, and the best way to learn is by building real solutions to real problems.

That's why we're excited to introduce ATH Hackathon 2026, organized by Athenura a platform dedicated to empowering students, developers, designers, and innovators.

DEV Community: Sameer Singh

I Built Toolnic An All-in-One Offline Utility App for Android

ATH Hackathon 2026: Build, Innovate, and Compete with the Brightest Minds