On the day an app goes live on the stores, many people think the job is done. In reality it has only just begun. Operating systems that update every year, new rules from Apple and Google, libraries that become obsolete, security vulnerabilities and users asking for improvements: an app without maintenance stops working well much sooner than you'd expect.
In this article we look at what app maintenance includes, how to estimate the budget and the concrete risks of putting it off.
Why an app needs maintenance
A mobile app lives in an ecosystem that keeps changing. Every version of iOS and Android introduces new APIs and makes others obsolete; the stores periodically raise their minimum requirements (such as the target SDK on Google Play) and limit the visibility of apps that don't meet them. Even if the app's code stays the same, the environment around it doesn't.
The four types of maintenance
1. Corrective maintenance
Fixing bugs reported by users or detected by crash reporting tools. It includes root-cause analysis, the fix, regression testing and releasing a new version.
2. Adaptive maintenance
Adapting the app to new OS versions, new devices and screens, new store requirements and updates to third-party services such as payments, maps or social login. It's the least visible part, but it's what stops the app from suddenly breaking.
3. Preventive maintenance
Updating dependencies, applying security patches, refactoring the most fragile parts of the code and monitoring performance. It reduces technical debt and makes future work cheaper.
4. Evolutionary maintenance
Small improvements and new features based on usage data and feedback. It's what keeps the app competitive and grows retention and store ratings.
How much does app maintenance cost?
A common industry benchmark is to budget between 15% and 25% of the initial development cost each year. The real figure depends on a few factors:
- Number of platforms: with Flutter a single codebase covers iOS and Android, significantly reducing adaptation costs.
- External integrations: every third-party service (payments, CRM, ERP) is a point that can change and require work.
- Quality of the original code: automated tests and a clean architecture make every intervention faster.
- Service level: guaranteed response times and on-call support cost more than scheduled work.
Read also: digital project prices, ranges explained
What happens if you put maintenance off
- The app gets restricted or removed from the stores because it no longer meets their requirements.
- Crashes and slowdowns on newer devices send reviews and downloads tumbling.
- Outdated dependencies expose user data to known vulnerabilities.
- Technical debt piles up until updating costs more than rewriting from scratch.
How to set up an effective maintenance plan
The most efficient solution is a maintenance contract with a set number of hours or a fixed fee, covering continuous monitoring (crashes, performance, security), an update calendar tied to iOS and Android releases and room for evolutionary improvements. That way maintenance becomes a predictable budget line rather than a series of emergencies.
App maintenance: frequently asked questions
How often should an app be updated?
At least once or twice a year, in line with the major iOS and Android releases. The most active apps ship updates every few weeks.
Can a different agency maintain an app built by someone else?
Yes. The new team starts with a technical audit of the code to assess its condition, risks and priorities, then takes over the app with a clear plan.
Does maintenance include new features?
It depends on the contract. Evolutionary maintenance usually covers small improvements, while major features are scoped as separate projects.
Conclusion
Maintenance isn't an optional extra: it's what protects the investment you made in building the app. Planning it from the start, with a defined budget and a partner who knows the product, means having an app that is secure, compatible and constantly improving. GlueGlue supports its clients' apps after launch too, with tailored maintenance plans.
Let's talk about your project: get in touch with the GlueGlue team
