Launch is not the finish line — it is closer to the halfway point. Here is what ongoing app maintenance actually costs and why the budget for it belongs in your plan from day one.
Most founders budget carefully for building an app and barely at all for running one. That gap causes more app failures than bad product ideas do — not because the app was wrong, but because nobody planned for what happens after week one of being live.
OS Updates Do Not Wait For Your Roadmap
Apple and Google both ship major OS updates annually, and each one can break something — a permission dialog that changed, a deprecated API, a new review guideline your app now violates. An app with no maintenance plan accumulates this debt silently until an update stops working entirely, usually at the worst possible time.
Third-Party Dependencies Are Not Static
Payment processors, push notification services, analytics SDKs, mapping APIs — every one of these can change its terms, pricing, or interface without much warning. A maintenance plan is what catches a breaking SDK update before your users do.
What A Realistic Maintenance Budget Looks Like
As a rough guide, plan for 15–20% of your original build cost per year for a stable app with a modest feature cadence. That covers OS compatibility, dependency updates, bug fixes, and a small amount of ongoing improvement — not a major feature roadmap, which is a separate budget line entirely.
Apps that skip this line item tend to relaunch from a much worse starting position two years later than they would have paid for maintaining it the whole way through.
