When comparing Fedilab vs Twidere, the Slant community recommends Twidere for most people. In the question“What are the best Mastodon clients for Android?” Twidere is ranked 2nd while Fedilab is ranked 3rd. The most important reason people chose Twidere is:
The source code is available under the GPLv3.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Natively integrated translation
You can even aquire your own key (for free) from Yandex and install it in Fedilab so you don't get rate limited in reading multitudes of translated posts, news articles, and blogs.
Pro Free software/open source
The source code is available under the GPLv3.
Pro Modern UI
Pro Very customizable
The user can add and arrange his/her own tabs with specific views and filters.
Pro Supports custom API
It supports API customization, so you don't need to worry about API limits at all.
Pro Works as expected
Pro Handles Mastodon, Fanfou and StatusNet too
You need only one app to read Twitter and Mastodon.
Cons
Con Doesn't have a version for Apple iPhones
Sucks for iPhone users, but there are products for that platform that do provide 'some' of the functionality that Fedilab does.
Con Avoid, not userfriendly
Merges multiple accounts into one timeline and there is no way to get around that. This is ridiculous. only recommended if you have one account. Seeing one timeline is impossible. The app appears to be a copycat of Plume minus the ads in many ways. The app is missing the translate feature. The Trends feature doesn't work. Interactions missing features too. It's not intuitive as well, rather complicated. So very few downloads.