
Challenger
A clean mobile app with programming challenges for Android
What it does
Want to challenge yourself by solving programming challenges? We've got you with this beautiful and easy-to-use app. It's free to use, contains zero advertisements and distractions. Expect new challenges every month. Created by me, from https://lngzl.nl.
Does a similar job
all alternatives →
Bubble for native mobile apps (beta)2025 · bble.io · ▲1,029Build native mobile apps for iOS and Android without code.





More dev tools this month
the category →



OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 4d ago · opentrailpaper.com

Lettertrace▲375Track your AI visibility for free (using your own API keys!)
Dev tools · 28d ago · lettertrace.com
Source: Product Hunt launch ↗
Launched alongside, March 2022
the whole month →- IM
Hi HN! I made many small web games in the past with Unity or Phaser. But this time I wanted to make something completely on my own. So I coded a basic game framework in plain JavaScript, and used it to make Almost Pong. This was a really fun project that taught me a lot about JavaScript, and I plan to make more minimalist games with this framework. Interesting fact: Almost Pong doesn't load any assets, all sprites and sounds are generated with code. Happy to answer questions, and please let me know if you have any feedback on the game. Thanks!
Dev tools · 2022 · lessmilk.com
- IM
Life & fun · 2022 · networksfromscratch.com
- HA
Paste the following into the console of any HN page - for annotated avatars on all HN comments. (self contained code) for(u of document.querySelectorAll('.hnuser'))for(u.prepend(c=document.createElement('canvas')),x=c.getContext('2d'),c.width=18,c.height=14,s=u.innerText,r=1,i=28+s.length;i--;i>>29>X*X/3+Y/2&&x.fillRect(6+2*X,2*Y,2,2)&x.fillRect(6-2*X,2*Y,2,2):r+=s.charCodeAt(i-28,x.fillStyle='#'+(r>>8&0xFFFFFF).toString(16)))r^=r>>17,r^=r>2
Dev tools · 2022


- AG
Life & fun · 2022 · backofyourhand.com