[judge2020]

I think google pay[0] is entirely flutter[1] (how much is actually flutter is unknown). It does seem pretty slow, actually - it’s like it only plays every third frame when animating switching between the app’s tabs.

0: https://apps.apple.com/us/app/google-pay-save-pay-manage/id1...

1: https://developers.googleblog.com/2020/09/google-pay-picks-f...

[tpmx]

Here's a subthread about Flutter jank/performance from the 2.0 release back in March:

https://news.ycombinator.com/item?id=26333213

Back then at least one of the "featured" apps had key screens written in e.g. ObjC. Google Pay was also discussed.