We’ve published a special version of AppMaster Developer Legacy for previewing v3 Android applications to Google Play Market: https://play.google.com/store/apps/details?id=io.appmaster.developer.legacy
Starting from the next release our primary application AppMaster Developer will not show any v3 mobile apps inside. If you are still working with v3 mobile applications please start using Developer Legacy app.
We expect that AppMaster Developer Legacy for IOS will be released later this week or next.