Mobile app maintenance cost: what to budget in 2026

The short answer: mobile app maintenance usually costs 15-25% of the original development cost per year, or roughly $400 to $8,000 per month for simple and mid-size apps, based on published estimates from Krootl and ScienceSoft (verified November 2026). Those figures hide the part that matters most for your budget: some of that work is not optional. Apple and Google change their requirements on a schedule, and an app that falls behind can lose new users or block your next release.

Here is how it usually shows up. The team ships a version, collects feedback, and then nothing is planned for a while. One morning a message arrives from the store: update the app to meet the latest requirements, or it stops being available. Suddenly the next development cycle starts, not to build what users asked for, but to keep the app in the store. Radu, our founder, has helped clients out of this situation many times, and it is the opening story of the final chapter in his ebook Mobile App Fundamentals.

If you want this handled as a planned cost: we are Digital U, we build mobile apps from $5,000 (pricing page) and offer an optional monthly retainer for bug fixes, OS upgrades and store changes. If you prefer, we hand over a clean codebase and your team takes it from there. A free 30-minute call is enough to get a number for your app. The rest of this article is the reasoning, so you can judge any offer yourself, ours included.

What mobile app maintenance services include

Mobile app maintenance services are the recurring work that keeps a released app available, working and secure. They fall into four groups, and only the first is fully imposed from outside.

Type of work	What it covers	Can you postpone it?
Platform compliance	New store requirements, SDK and OS updates, rebuilding with current tools	Only until the store’s deadline
Fixes	Crashes, broken flows, bugs reported by users or monitoring	Depends on severity
Security and dependencies	Patches, library updates, third-party API changes	Risky, the backlog grows quietly
Running costs	Servers, monitoring tools, store accounts (Apple charges $99 per year)	No, these are bills

New features are a fifth category, and they should not be in this table. Compare two offers without separating them and you will compare two different things: one retainer may include development hours for features, another only keeps the app alive. Ask which one you are looking at.

How much mobile app maintenance costs in 2026

Mobile app maintenance cost varies mostly by complexity and by how much is included. These are published figures, all verified on November 2, 2026.

Source	Simple app	Mid-size app	Complex app
Digital U (us)	Optional retainer, quoted per app after a free call	Same	Same
ScienceSoft	$400-$1,500 per month	$2,000-$8,000 per month	$4,000-$30,000+ per month
SolGuruz (updated October 2026)	$500-$1,500 per month	$1,500-$4,000 per month	$4,000-$10,000+ per month
Krootl	Retainer from $1,000 per month, or $35-$45 per hour ad hoc	Same	No published figure

The percentage estimates disagree as well. Space-O (updated October 2026) says 15-20% of the development cost per year, Krootl says 15-25%, and Simpalm (updated July 2026) says about 10-15% in the first year and 8-10% after that. Every one of these sources sells maintenance or app development, ours included, so treat the figures as a range rather than as a measurement.

Why the 15-25% rule fails on a smaller app

The 15-25% rule for app maintenance works reasonably well on a large build and breaks down on a small one. On a $100,000 app it gives $15,000-$25,000 per year, which fits a retainer of around $2,000 per month. On a $5,000 app it gives $750-$1,250 per year, while the lowest published retainer above, $400 per month, adds up to $4,800 per year. That is almost the price of the app itself.

The cause is that the work does not shrink in proportion to the build. A store’s new requirement applies to a simple app as well as to a complex one, and someone still has to update the project, test it and submit it. So on a smaller app, do not start from a percentage and do not automatically buy a monthly plan. List the work the app actually needs in a year, then decide whether that work justifies a retainer or fits a few planned interventions. The section on when you do not need a retainer covers this below. For what the build itself costs, see how much a mobile app costs in 2026.

What happens to an app with no maintenance budget

An app with no maintenance budget keeps working for a while, and then the stores’ rules catch up with it. These are the current ones, taken from the official pages.

Google Play blocks updates on old targets and limits reach. According to Google’s target API requirements, since August 31, 2026 new apps and updates must target Android 16 (API level 36). Existing apps must target at least Android 15 to remain available to new users on newer Android devices. The extension Google offered ran until November 1, 2026, so that window has just closed.

Apple blocks uploads built with old tools. According to Apple’s upcoming requirements page, since April 28, 2026 every app uploaded to App Store Connect must be built with Xcode 26 or later, and since September 9, 2026 iOS and iPadOS apps must target iOS 13 or later.

Apple removes outdated apps. Under App Store Improvements, an app not updated in three years that also falls below a minimal download threshold gets a notice and 90 days to submit an update, or it is removed. Apps that crash on launch are removed immediately.

Read those rules from a business angle and the real risk becomes clear. It is not only removal. The compliance bill arrives on the day you need something else: a payment bug in production, and a fix that should take an hour cannot ship until the project has been upgraded to tools it has not seen in two years. An urgent fix turns into a multi-week project, at the worst possible moment.

Not sure how far behind your app is? That is quick to check and useful to know before a deadline picks the date for you. Book a free 30-minute call or request a free audit.

How to make app maintenance a predictable cost

App maintenance becomes a predictable cost when small updates happen on a schedule rather than one large upgrade under pressure. Radu’s ebook frames the decision this way: the question is not whether to upgrade, but how to make maintenance a predictable cost instead of an emergency. Three habits do most of the work.

Stay close to current, on purpose. Teams that update incrementally can stay one version behind the latest, which takes little effort and avoids most breaking changes. Teams that do not are later forced into jumps across several versions. The tools move quickly: React Native’s release schedule commits to maintaining only the latest three minor series, and on the schedule as of November 2026, version 0.85, released in April 2026, is already unsupported.

Put the store calendar in your budget. Both stores publish their requirements in advance. Once a year, read the Google and Apple pages, note the dates and book the work before them, not during the same week as a launch or a sales campaign.

Bundle upgrades with business value. Users see nothing from a tech update, which is why these updates are hard to justify on their own. So combine them: when the project is open for an upgrade anyway, schedule the bug fixes and small improvements users have been waiting for. The same release then pays for itself. When you are forced into a large jump, go to a stable version that meets the requirements with minimum risk, and skip the temptation to change everything at once.

Monitoring belongs in the same plan. Knowing about crashes before users write reviews is what keeps the fixes category small, as covered in mobile app analytics: what to track. Security updates carry their own business case, explained in mobile app security as a sales argument.

What to ask before signing a maintenance contract

A mobile app maintenance contract is easier to compare once you have the same answers from every provider. These five questions separate most offers.

1. Does the price include store compliance updates, or are they billed as extra?
2. Are feature development hours included? How many, and what happens to the unused ones?
3. What is the response time for a critical bug, and is it written in the contract?
4. Who owns the code, the store accounts and the monitoring tools if we stop working together?
5. Which versions are we on today, and what is the plan for the next required upgrade?

The last question also works as a test. A provider who can answer it has looked at your app. A provider who cannot is selling hours.

When you do not need a maintenance retainer

A maintenance retainer is not automatically the right choice, and an agency that says otherwise is selling hours too.

If your app is stable, has few changes planned and has no sensitive data or payments, a few planned interventions per year can be enough: one for the store deadlines, one for dependencies, plus ad hoc fixes. If you have a developer on the team, what you need is a clean handover and a written calendar rather than an external contract. A retainer starts making sense when revenue depends on the app, when a broken release costs you money the same day, or when you ship often enough that someone has to watch the platforms continuously.

The one option that does not work is having no plan at all, because then the stores choose the date for you.

Frequently asked questions

How much does it cost to maintain a mobile app? 15-25% of the original development cost per year is the most common estimate, according to Krootl (verified November 2026). On a $100,000 app that means $15,000-$25,000 per year. The rule is less reliable on small apps, because store compliance work does not shrink in proportion to the build.

How much do mobile app maintenance services cost per month? $400-$1,500 per month for a simple app and $2,000-$8,000 for one of moderate complexity, according to ScienceSoft (verified November 2026). SolGuruz gives $500-$1,500 and $1,500-$4,000 for the same two groups. The difference comes mostly from what each retainer includes, especially feature development hours.

What is app maintenance? App maintenance is the recurring work that keeps a released mobile app available, working and secure: store compliance updates, bug fixes, security patches, dependency updates and running costs such as servers and the $99 per year Apple Developer Program. New features are usually treated as separate development, although some retainers include them.

How much does it cost to develop and maintain a mobile app? 15-25% per year on top of the build cost is the usual planning figure for maintenance, per Krootl. At Digital U, mobile apps start from $5,000 (pricing page), with an optional retainer. Market prices for the build itself are compared in how much a mobile app costs in 2026.

What’s the average maintenance fee? 15-20% of the development cost per year is the average given by Space-O (updated October 2026) for mobile apps. Other published estimates range from 8-10% in later years, per Simpalm, to 25%, per Krootl. All of them come from companies selling this service, so use them as a range.

What happens if a mobile app is not maintained? 90 days is the time Apple gives to submit an update when an app not updated in three years also has very few downloads, after which it is removed, according to App Store Improvements. On Android, an app must target at least Android 15 to remain available to new users on newer devices, per Google’s requirements.

Want to know how far behind your app is and what it would take to catch up? Request a free audit or book a 30-minute call: we check the versions, the store deadlines and what can safely wait, no obligation.