Hello HN users,I made a web app that allows you to upload any SNES or GameBoy ROM file and play right within the web browser. It’s called Afterplay.io. It got a lot of upvotes on Reddit, and I noticed users signing up and coming back to play games every day, which feels great and has motivated me to keep on developing this thing :).Demo Video :  : 
I couldn't play emulated games across my devices easily with saves. The Apple App Store does not allow emulator apps.Solution:
Use Afterplay.io. It works in the browser, on PC’s, Mac’s, Android and iOS phones. Once you upload a game file, it will be stored on our server and we save the state of your gameplay automatically each 20 seconds.You can sign in, upload and play a game from your Mac, and later resume from your iPad or Android phone right where you left off.This is the first iteration of the web app. The core functionality is working but there’s still a lot of work to do. So I’m writing code and pushing tiny improvements a few times a day. I welcome any thoughts or suggestions.