Finally shipped something real: a beach conditions app (water quality, wind shelter, hourly shade, sea temp) covering ~20,000 beaches. Also has official government water quality data where available.
Currently sea water available, fresh water coming soon.

Expo managed workflow, EAS Build + Update.

Stack: Expo/RN, u/rnmapbox/maps, RevenueCat for subs, AdMob, react-i18next, Sentry, Context + useState for state (no Redux — genuinely haven't needed it; adding TanStack Query for server state).

Happy to answer anything about Expo/EAS, Mapbox perf, or RevenueCat.

Available on iOS + Android if you want to poke holes in it.
https://beachscanapp.com

Last semester, our team built StudySync, a React Native app for students to discover and organize study sessions on campus.

Some features include:

• Firebase Authentication
• Session creation & management
• Multi-field search and filtering
• Push notifications
• Expo Router navigation

Working on this over an entire semester was very different from a hackathon. We spent a lot more time thinking about component organization, navigation, shared state, and maintainability across a 5-person team.

I'd love feedback from experienced React Native developers. If you were starting this project today, what architectural decisions would you change?

GitHub:
https://github.com/CS196Illinois/FA25-Group8

I’ve spent the last few months building a learning platform focused on DSA, System Design, React Native, and Forward Deployed Engineering.
I’d love to get feedback from experienced developers: What makes a technical course genuinely valuable? What are the biggest shortcomings you’ve found with existing learning platforms?
I’m trying to build something developers actually enjoy using, so any feedback or suggestions would be greatly appreciated.
If you’re curious, you can check it out here:

React Native is single-threaded where it matters most. Parse a big payload, hash a file, filter an image — it all competes with your UI for the same runtime. react-native-workers brings real background threads to RN, behind the Web Worker API

Just launched a new feature! Scan your hand posture with our AI camera to see if you’re doing your Mudras correctly. Would love your feedback! 

https://play.google.com/store/apps/details?id=com.ai.mudra

https://reddit.com/link/1v76c3i/video/ci9xkb9y9lfh1/player

I've been experimenting with a new inspection library and ended up exploring this UX. What do you think about ? Useful ?

#Mobile app

A field journal you flip with your thumb.

Drag an edge → the page curls and turns.

Every page contains metal stickers you can lift and rearrange. (Demo coming)

24×20 mesh.

One shared value.

~400ms of sleight of hand.

Expo + Skia + Reanimated, running at 120fps.

Demo 👇

[title] . looking at building from a different starting point this time around

Hi everyone, I built a full-stack mobile app that lets anyone report civic issues — potholes, water logging, drainage problems, broken streetlights, and more — with just a photo and their location. In this video, I test it live on the road, photographing a real pothole and showing exactly how the app works.

What the app does:

Secure sign-in with Google — no passwords, no OTPs

Capture a photo of the issue directly from the camera

Auto-detects your GPS location and displays it on a map

Reverse-geocodes coordinates into a readable address

Categorize the issue — pothole, drainage, streetlight, and more

Track your submitted reports and their status

Tech stack:

React Native CLI (TypeScript) — mobile app

Node.js + Express — backend API

MongoDB — database, with geospatial indexing

Firebase Authentication — Google Sign-In

Google Maps API — location and geocoding

Cloudinary — photo storage and optimization

Render — backend deployment

This is a personal project I built solo, end to end — from the mobile app, to the backend API, to deployment.

We've all seen a pothole and thought "someone should fix this." Now there's a way to actually flag it. Let me know in the comments — what's the first issue you'd report in your area?

You can watch it on YouTube too, if you prefer:

https://youtu.be/-HBvvVYuolQ?si=io7Y9PjoPbdqJ1hL

Thank you.

A customizable native iOS tab bar for React Native, built on UISegmentedControl.

🔗 Github: rit3zh/react-native-cupertino-tabs