At my previous position we built our own A/B testing framework for iOS. There were a few hiccups, but overall it wasn't too complicated. One thing that was important for us was to be able to tie together stuff happening on the Web side of the product with tests running in the app. Curious if this is possible with Taplytics.
Despite the DIY solution being relatively straightforward, given that they have a free plan, this seems like a much better way to get started.