Retainer · Rolling
App maintenance that keeps releases moving.
Continuous delivery on an app that already exists: features, OS migrations, crash triage and the performance work nobody schedules.
Stack
01Coverage
What a maintenance retainer covers.
Reserved senior capacity, not a ticket queue answered when someone is free.
- OS and SDK migrations
- Every September and every Play target-SDK deadline, handled before the store forces it rather than after.
- Crash and ANR triage
- Sentry and Crashlytics triage with a stability budget, so regressions get caught by us rather than by your reviews.
- Performance work
- Instruments profiling for launch time, scroll, memory and battery — the things users describe as the app feeling slow.
- Feature delivery
- Ongoing product work in the same release train, with the same senior engineers who know the codebase.
02Terms
How the retainer works.
From $4k a month, rolling, no lock-in.
- Reserved capacity
- A set amount of senior engineering time each month, scheduled with you rather than bid for against other clients.
- On-call triage
- An agreed response path for production incidents, so a crashing release does not wait for the next sprint.
03FAQ
App maintenance: common questions.
How much does app maintenance cost?
From $4k a month on a rolling retainer. The rate scales with reserved capacity and the response commitment you need.
Will you maintain an app you didn't build?
Yes. We start with a codebase read and a written assessment before committing to a monthly scope — see app rescue for heavier cases.
What happens each September when iOS updates?
We test against the betas over the summer, fix what breaks, and ship a compatible release around the public launch rather than after users report it.
04Related
Related capabilities.
Most engagements touch more than one of these.
App rescue
The previous team is gone, the build is broken and the last release was a year ago. That is a normal starting point, not a disqualifier.
iOS app development
Swift and SwiftUI, current-generation Apple frameworks, and a release you own end to end. No wrappers, no WebView shortcuts.
Android app development
Modern Android with Jetpack Compose, Material 3 and an architecture that survives its second year and its fourth OS version.
Tell us what you're building.
Send the rough version. A senior engineer reads every brief and replies within one business day.