We (Heap) recently launched our iOS library. In addition to retroactive funnels and arbitrary key/value pairs, we let you retroactively define events without having to ship new code to the app store.

For instance, you can define an event as a "Touch on a UIButtonView". Then, we dig into your users' entire past activity to let you instantly segment on that event or include it in funnels. No new code is required.

We haven't publicly launched our Android integration yet, but we should be able to figure something out - ping us at [email protected]. We're flexible on pricing and would love to help.