Versions and build numbers
Set the version customers see and the build number every upload needs, both next to the build button in Build.
Updated Oct 11, 2026
The two numbers
| Version | Build number | |
|---|---|---|
| Example | 1.2.0 | 14 |
| Android | versionName | versionCode |
| iOS | CFBundleShortVersionString | CFBundleVersion |
| Customers see it | Yes | No |
| Who sets it | You, in Build or app.json | FluxNative, counting up |
| Must go up | For each store release | For every upload |
Steps
- Click Build. The version and the next build number sit next to the build button.
- For a new release, type a version of one to three numbers, such as
1.3.0. - If the store already has higher build numbers, type a higher one.
- Start the build. The version is saved to
app.jsononly once the checks pass.
Or ask the assistant:
Bump the app version to 1.3.0.Good to know
- Android and iOS count build numbers separately. A number is never reused, even after a failed build.
- A number at or below an earlier one is refused before the build starts, as the stores would refuse it.
- A store says the number was used? Set a higher one in Build and build again.
Related
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