In this article · 10 sections
Key takeaways
- Apps need maintenance because iOS and Android update every year, libraries and SDKs age, store requirements rise and security issues appear.
- Maintenance covers four types of work: fixing bugs, adapting to new platforms, preventing future problems and small product improvements.
- A common rule of thumb is to budget a meaningful yearly percentage of the original build cost, plus hosting, SDK and account fees.
- Retainers suit ongoing products, time-and-materials suits occasional work, and SLAs suit business-critical apps.
- Delaying maintenance gets expensive: a small yearly upgrade costs far less than a forced rewrite.
Launching an app is not the end of the work. It is the beginning of a new phase. Operating systems change every year, devices evolve, libraries age, security threats appear and users expect improvements. An app left alone gradually stops working properly, loses ranking and attracts bad reviews. Maintenance is what keeps a product healthy.
Yet it is the cost most often forgotten when people budget for an app. This guide explains what maintenance includes and how to plan for it.
Why apps need maintenance
Software ages even when you do not touch it, because everything around it changes.
- iOS and Android release major updates annually and smaller ones throughout the year, sometimes changing behaviour or deprecating APIs
- New devices and screen sizes appear
- Third-party libraries and SDKs release fixes and drop support for old versions
- App stores raise requirements, such as the minimum target API level on Google Play or new privacy disclosures
- Servers, certificates and cloud services need renewing and updating
- Security vulnerabilities are discovered regularly
- Users and competitors move on. What felt modern two years ago may feel dated.
The types of maintenance
1. Corrective: fixing problems
Resolving bugs and crashes found by users or monitoring. This includes triage, reproduction, fixing, testing and release.
2. Adaptive: keeping up with the environment
Updating the app for new OS versions, devices, store requirements, API changes and third-party service updates. Much of this is predictable. Platform vendors announce changes ahead of time.
3. Preventive: reducing future risk
Upgrading dependencies, refactoring fragile code, improving test coverage and paying down technical debt before it causes failures.
4. Perfective: improving the product
Small enhancements based on feedback and data: UX improvements, performance gains and minor features. Larger features are usually treated as new development rather than maintenance.
Core tasks in a maintenance plan
| Area | Typical activities |
|---|---|
| Monitoring | Crash reports, performance and error rates, uptime checks, cost alerts |
| Releases | Regular update cadence, release notes, staged rollouts |
| Platform compatibility | Testing and updating for new OS versions and devices |
| Security | Patching dependencies, rotating keys and certificates, vulnerability scanning. See the mobile app security checklist. |
| Backend and infrastructure | Server updates, database maintenance, backups, scaling adjustments |
| Store compliance | Privacy declarations, policy changes, target API level updates |
| Support | Responding to user issues and reviews. See ratings and reviews. |
| Analytics review | Checking retention and key funnels to guide fixes |
| Documentation and knowledge | Keeping setup guides, architecture notes and runbooks current |
What it costs
Cost depends on the app’s size, complexity, number of integrations and user base. A common planning rule of thumb is to budget a meaningful annual percentage of the original build cost for ongoing maintenance, but the right figure varies widely and should be based on your specific app. Factors that push costs up include many third-party integrations, complex backends, strict compliance needs and rapid user growth.
Also remember direct running costs:
- Hosting and cloud services
- Third-party APIs and SDK licences
- Developer accounts (annual Apple fee, Google registration)
- Monitoring and analytics tools
- Customer support tooling
See how much it costs to build an app for the wider budget picture.
Maintenance models
- Retainer: a fixed monthly fee for a set amount of support and updates. Predictable and good for ongoing products.
- Time and materials: pay as work is needed. Flexible but less predictable.
- In-house team: developers who own the product long term.
- Service-level agreement (SLA): a formal commitment on response and resolution times, useful for business-critical apps.
Choose based on how critical the app is and how much change you expect.
Warning signs of neglect
- Rising crash rates and one-star reviews mentioning bugs
- The app breaks after a new iOS or Android version
- Store warnings about outdated target API levels or policy issues
- Slow, inconsistent releases
- Dependencies several major versions behind
- Nobody knows how to build or deploy the app
- Growing unresolved support requests
The longer maintenance is delayed, the more expensive catching up becomes. A small yearly upgrade is far cheaper than a large forced rewrite.
Plan ahead
- Budget from the start. Include maintenance in your business case.
- Set up monitoring before launch. See analytics events to track.
- Keep a regular release rhythm so updates are routine, not emergencies.
- Track platform announcements. Test against beta OS versions in summer, ahead of the autumn releases.
- Maintain automated tests and a reliable build pipeline. See how to test a mobile app.
- Document everything. Make sure you own the source code, accounts and credentials, and that more than one person can access them.
- Review quarterly: health, costs, roadmap and risks.
Common mistakes
- No maintenance budget
- Waiting for something to break
- Letting dependencies fall far behind
- Only one person knowing how the app works
- Not owning accounts and source code
- Treating maintenance as wasted money rather than protection of an asset
Checklist
- Annual maintenance budget agreed
- Monitoring and alerts live
- Release cadence and process defined
- OS and store changes tracked
- Dependency and security updates scheduled
- Backups and infrastructure maintained
- Support and review response process
- Documentation and access shared with the team
- Quarterly health review
Final thoughts
Great apps are looked after, not just launched. Planning for maintenance protects your investment and your users. If you want a team to keep your app secure, current and improving, see our app development service or contact us.
Frequently asked questions
What does mobile app maintenance include?
Monitoring and bug fixes, updates for new OS versions and devices, dependency and security patches, backend and infrastructure upkeep, store compliance changes, user support and small improvements.
How much does app maintenance cost per year?
It depends on size, integrations and user base. A common planning rule of thumb is a meaningful yearly percentage of the original build cost, plus direct running costs such as hosting, SDKs and developer accounts.
What happens if I do not maintain my app?
Crashes and bad reviews increase, the app can break on new OS versions, stores may warn or restrict it for outdated requirements, and catching up later costs much more.
Which maintenance model should I choose?
A retainer gives predictable ongoing support, time-and-materials suits irregular work, an in-house team suits long-term ownership, and an SLA suits business-critical apps that need guaranteed response times.
