Over the past few months, we built and launched RonikCloud ( https://ronikcloud.com/ ), a client-side encrypted cloud storage app built in Flutter across Web, Desktop (macOS, Windows, Linux), and Mobile (iOS, Android). In this article, we share our architectural choices, lessons learned, and how we solved client-side encrypted streaming performance in Flutter. The Problem: Cryptography vs 60/120 FPS UI Client-side encryption requires running heavy authenticated cryptograp...