Free Tool
App Maintenance Cost Calculator
Estimate what it really costs to keep your mobile app running each month and year — maintenance, hosting, and integrations.
Budget the cost nobody mentions at launch
Launch cost gets all the attention in early planning. Maintenance is the number that actually decides whether an app is still alive a year in — hosting, bug fixes, OS updates, security patches and small feature changes do not stop when it ships.
Enter your build cost, complexity and user base, and get a monthly and annual figure to plan around.
Where the money actually goes
Five lines, and only the first grows in a way most people anticipate.
- Hosting and third-party fees both scale with usage — servers, storage, bandwidth, payments, maps, analytics.
- OS updates arrive every year from Apple and Google, and something always needs testing and fixing against them.
- Security patches are not optional, and feature tweaks follow real user feedback whether you budgeted for them or not.
What the shock actually looks like
A founder budgets $40,000 to build and nothing beyond it. Six months after launch an OS update breaks a core feature, a third-party API changes its pricing, and user growth forces a server tier upgrade — all in the same quarter, with nothing set aside.
- Estimating this before launch, even roughly, turns it into a planned expense rather than a fire.
- Typical annual maintenance runs 18–25% of build cost.
- On a $40,000 build that is $7,200–$10,000 a year, or roughly $600–$833 a month from the day it ships.
Use it to plan, not just to know
Treat the output as a monthly budget line from day one of launch, not a surprise to react to later.
- If the number is tight against your runway, that is a signal to reconsider scope or complexity now, while changes are still cheap.
- Cutting a feature before it is built costs nothing. Cutting it after launch costs the build plus the removal.
- Complexity is the main driver — it raises both the build and the percentage you pay annually against it.
What feeds the estimate
Three inputs, and complexity does most of the work — it is the difference between a form that posts to an API and an app with offline sync, payments and background jobs.
- Original build cost, as the base the percentage applies to.
- Complexity — simple, medium or complex, which sets where in the 18–25% band you land.
- Platform, because iOS and Android each bring their own annual update cycle to test against.
- 1Original build costWhat it cost to make.
- 2ComplexitySets the percentage band.
- 3PlatformOne OS cycle, or two.
Four numbers worth keeping
Why Parix.ai gives this away
We build apps, and the conversation nobody enjoys is the one six months after launch about a cost that was never in the plan. Putting the number in front of you early is cheaper for everyone — which is why there is no paywall.
Estimate my maintenanceWho uses it
Founders planning runway, product owners defending a budget, and anyone who has been quoted a build cost and assumed that was the cost.
Size the build too
The Mobile App Cost Calculator estimates the build, and the MVP Feature Prioritizer helps decide what to cut when the two numbers together do not fit.
When the number does not fit
That is useful information before you build, not after. Our app development team will scope to a budget that includes year two.