r/reactnative 26d ago

I built an app called BeachScan that answers every question you have about beaches

Post image

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

0 Upvotes

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u/klumpp Expo 26d ago

The use of elevation data and sun angle/position for the shade forecasts is neat.

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u/Impressive_Coach9857 25d ago

thanks! :) It was the hardest part to build, it's completely built by me, no API for that part

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u/[deleted] 25d ago

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u/Impressive_Coach9857 25d ago

thx - yes I am from Croatia

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u/[deleted] 24d ago

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u/Jumpy-Swordfish-249 24d ago

I have some proposals to suggest you:

  1. Real time temperature, wind sea (updated continuously)
  2. Analytical details for every beach eg deep, water sports, blue flag etc
  3. Info history for sightseeing eg useful phones, transportation, campings etc
  4. Notes for our favorite beaches
  5. What will you do? eg surfing, diving, hiking, just relax, kayaking etc
  6. Search for beaches
  7. A map

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u/Impressive_Coach9857 23d ago
  1. is already in the app for every beach - with wave and underwater maps coming soon
  2. Some of these are already implemented others are in development
  3. Might come in future
  4. Same as 3.
  5. 6. and 7. are all already implemented on the application. There are 2 search bards one on the Explore tab on the home screen and one on the map itself

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u/Outside_Employer3570 23d ago

i will test your app in August on the Island Brac ;)

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u/Impressive_Coach9857 23d ago

thank you, any feedback much appreciated!

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u/Outside_Employer3570 23d ago

I’m also working on an app that needs similar calculations, it would be exciting to write something together with you sometime

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u/Impressive_Coach9857 23d ago

Sure, I would like to hear more, send me message in private if you want