Event tracking: who should be in charge? Developers? Marketing? Product?

I’m the lead developer in a pretty small team (3 devs, 1 designer, 2 marketing, 2 bizdev, 2 cofounders, not anyone dedicated to “product”), working on a mobile app.

We’ve discussed a few times about how we should track what users do in the app, especially how they interact with new features we ship so we can better know what works or not.

However everyone is super busy, so while we do add a bunch of events in the app, there is no rigorous process for how to got about it, and we rarely analyze results.

Since the developers are the ones writing the event tracking into the app code, I feel we have a responsibility to think about doing it. But I also feel like anyone else could be benefitting from good tracking, so they should be equally responsible for thinking of a good tracking strategy.

So I'm wondering who is typically in charge of planing this kind of tracking? I guess if we had a product manager he/she would be doing that… How does it work in your teams?