When you upload app previews to AppManager we use the file name and the dimensions of the file to automatically detect the locale (language), position, and device category/size.
We automatically detect the device size/category for App Store Connect. This is harder as for screenshots, because it's possible to have the same resolution for different device categories. Please refer to our overview of all possible resolutions.
If you are localizing your app previews for international audiences, you can use the official ISO locale codes in the file name. Please refer to our overview of all possible languages.
Simply use a number from
1-3 (App Store Connect) to indicate the position and order of your app previews.