An app is not a one-time cost, and the build quote is the part everyone compares. Google raises the API level apps must target every year; miss it and your listing stops accepting updates, then stops being offered to new devices. That is not optional maintenance, it is the price of staying published.

So we quote both halves. What it costs to build, and what it costs to keep alive — because a cheap build that gets pulled from the store in eighteen months was not cheap.