An app is not finished when it ships. Two operating system releases a year, a store policy that changes without warning, and dependencies going stale — none of it stops because the project did.
None of this is interesting work, which is exactly why it stops happening once the original team moves on and the app quietly starts to rot.
Testing against platform betas before they reach your users, so an autumn OS release isn't the reason your reviews collapse in October.
Dependencies updated on a schedule with the breaking changes handled, rather than frozen at whatever shipped on day one.
Crash reporting watched and worked through by frequency and impact, so problems surface from the data rather than from one-star reviews.
Policy changes tracked and applied ahead of deadlines — privacy labels, permission rules, and the requirements that get apps pulled.
Start-up time, memory, and battery tracked across releases, because these degrade gradually and nobody notices until it's severe.
Builds, signing, phased rollout, and the ability to halt a release when the crash rate moves the wrong way.
An unmaintained app doesn't fail on a particular day. It degrades until someone notices the ratings, and by then the work is a rescue rather than upkeep.
If the app needs rebuilding rather than maintaining, that's cross-platform app development.
Tell us what's live, who built it, and when it was last updated. We'll audit the state it's in and quote for taking it on.