I saw a lot of recent posts about ForumX, Fig and Lexicon. The 1st is a service who’ll create an app for you, the 2nd two appear to be abandoned based on the comments on here where they are mentioned.
We built an android app with push notifications which operates great for our platform, it has it own icon, welcome screen, and then loads our forum directly in an app format. Here it is in the Play Store. We’ve also been planning on building an iOS one using Flutter for a while.
If you’re able to code a little you are very welcome to modify our Android app and use it for your forums. Here’s the Android Apps Git. If not i expect one of our opensource devs would be happy to modify it for you for a few hundred bucks, send me a DM and i’ll ask them.
If you want the opensource iOS app we’re building in Flutter you can either wait until our volunteer network builds it, although i should caution that it could take a year or so. Or you could join in coding it with us, or if a few people want to chip in together financially we could greatly speed up the process and have it in around a month.
All our devs code in the free-time after work so things tend to move at a glacial pace, but if it was incentivised there would be devs who want to get on and build it faster. The final app would need to be opensource and available for everyone.