How to know when Magical Chest or Giant Chest Drop (+app)

hello sexy person reading my description hope you have a nice day remember to sub and like my videos!! Download app here: Chest Tracker for Clash Royale - Easy Rotation Calculator by TouchMint https://appsto.re/us/-drdbb.i I found a similar app for android although I dont know if it works the same as the one showed in vid so please let me know in comments. :) download android app here:https://play.google.com/store/apps/details?id=creativecoders.clashroyalchesttracker&hl=en