I don't remember where I saw the ad, but I came across an app called "tapatalk".
It's a few bucks in the app store, and can be used on a pretty large amount of forums, speedsolving being one of them.
Easy to log in with. Has a security pass option for secure logins. Let's you log in with your username or as a guest. Search function and navigation work well. Tons of other stuff.
I'm using it to do this post.
So, if you're looking for a good app to browse all (all the ones I frequent) forums, check it out.
Here's a screenshot I took while typing this:
- Pixel -