From the TestFlight docs: https://testflight.apple.com/
iOS apps: iPhone, iPad, or iPod touch running iOS 8 or later. App Clips require iOS 14 or later. iMessage apps and sticker packs require iOS 10 or later. It lists the app as still compatible with iOS 8+, so hopefully this is an unintentional change?
It looks like version 2.7.0 (Aug 17, 2020) was the last version that still had the proper compatibility list.
The latest version 3.0.0 (Nov 11, 2020) is the version that has iOS 13.0 as the minimum iOS version in the compatibility list on https://apps.apple.com/us/app/testflight/id899247664
tamirh
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