Can I use an app for my 90-day reporting while on a non-ED visa in Thailand?

Yes, it is possible to do your 90-day reporting using an app while on a non-ED education visa. However, it's recommended to use the online system through the Immigration web-portal for a more stable experience. Once completed, you'll receive approval within 24 hours, which you can print and place in your passport. Note that you need to have submitted at least one previous 90-day report in person to access the app.