I Couldn’t Call My Mom. So I Built a Video Calling App. I couldn’t video call my mom. That’s what started all of this. She’s on Android, I’m on iPhone, and suddenly a simple call turned …

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A developer built a browser-based video calling app called JustCall after struggling to video call his mother across Android/iPhone platforms. The post covers the technical challenges of cross-border WebRTC (NAT traversal, TURN server fallback, UDP throttling) and a key product lesson: after launching, a 70% bounce rate revealed that making the call technically reliable wasn't enough — users also needed to trust the product before engaging. The author redesigned the landing experience to answer basic trust questions and shares the insight that building something people use requires both making it work and making people believe it works.

I Couldn’t Call My Mom. So I Built a Video Calling App.

The idea took ten minutes. The internet took longer.