Mobile app maintenance typically costs 15–20% of the initial development cost per year. So an app that cost $50,000 to build needs a maintenance budget of roughly $7,500–10,000 annually. That figure covers server costs, bug fixes, iOS/Android version compatibility, security patches, and minor improvements. Shipping the app and walking away is not an option: an unmaintained app starts breaking on new OS versions, tripping over store policies, and losing users within 12–18 months.
Why is maintenance cost unavoidable?
A website lives in a relatively stable environment; a mobile app sits between two operating systems (iOS and Android) that ship major releases every year, store policies that change constantly, and hundreds of different devices. Apple and Google publish new OS versions annually; old APIs get deprecated, new permission models arrive, and minimum SDK requirements rise. If your app doesn’t keep up, bugs appear on specific devices first — and eventually the stores can delist apps that never get updated.
What does annual maintenance include?
- Server and infrastructure costs: hosting, database, CDN, push notification services (scales with user count)
- iOS and Android compatibility: testing and code updates for each year’s new OS versions
- Bug fixes: resolving issues surfaced by user reports and crash analytics
- Security patches: library updates, closing known vulnerabilities, certificate renewals
- Store management: keeping up with App Store and Google Play policy changes, developer account renewals
- Third-party service updates: tracking versions of payment, maps, and analytics SDKs
- Minor improvements: screen and flow refinements based on user feedback
The industry rule of thumb: budget 15–20% of the initial development cost for annual maintenance. For actively developed apps that ship features frequently, that ratio can climb to 30–50%.
What drives maintenance cost up or down?
Not every app carries the same maintenance load. The main variables: app complexity (a simple catalog app and one with payments, live notifications, and maps don’t need the same care), user count (server and support costs grow with users), number of platforms (Android-only vs. iOS + Android), the number of third-party integrations, and the age of the backend architecture. If the architecture was set up properly during initial development, maintenance costs drop noticeably — we covered this in our mobile app development cost article.
How do iOS and Android updates affect the budget?
Apple ships a new iOS every September, and Google ships a new Android every year. Google Play also refuses to let apps fall below a target API level — a requirement that rises annually. In practice this means at least one “compatibility pass” per year: the app is tested on the new versions, deprecated APIs are replaced, libraries are updated where needed, and a new build is submitted to the stores. Skip that pass and problems accumulate — a catch-up update two years later costs far more than steady annual maintenance. For the store-side details, see our App Store and Google Play publishing guide.
Retainer or hourly support?
There are two models. With a monthly maintenance retainer, a fixed fee buys you a pool of hours, priority response, and regular compatibility checks; the budget is predictable and issues get caught before they grow. With the hourly (as-needed) model, you only pay when work comes up; it looks cheaper at first, but there is no guaranteed response time in an emergency, and problems are usually noticed only after they’ve cost you users. For any app with active users, we recommend a retainer; the hourly model is enough only for low-risk, internal-facing apps. You can find the web-side equivalent of this comparison in our website maintenance cost article.
Conclusion
A mobile app budget doesn’t end at launch: planning a maintenance line item of 15–20% of the development cost per year is what actually determines the app’s lifespan and user satisfaction. To build a realistic maintenance plan and budget for your app, explore our mobile app service or get a free quote.