Work out app development cost instantly with clear inputs, formula shown and shareable results.
The first platform costs full price and each additional native platform adds roughly 60% more, since business logic and design are reused but UI code is not. That 60% figure is the real argument for cross-platform frameworks: a second native platform never costs the full amount again, but it is far from free.
Total hours
hours = screens x hours per screen x (1 + 0.6 x (platforms - 1))
hours = screens x hours per screen x (1 + 0.6 x (platforms - 1)). The first platform costs full price and each additional native platform adds roughly 60% more, since business logic and design are reused but UI code is not.
That 60% figure is the real argument for cross-platform frameworks: a second native platform never costs the full amount again, but it is far from free.
Enter screens in the app, hours per screen, blended hourly rate, native platforms to build. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.