Onboarding app sounds like an insurance sign-up app. It’s not fun and nobody does it because they want to do it but they need to do it.

How about the same app but as a module within other apps? Composability is a powerful tool and the whole ecosystem would benefit if there are a few awesome modules that do the job extremely well.

This way the money is on the prize the real user experience and the sign-up is just a phase to get there effortlessly.