I need to develop Emergency communication app. This app is not used frequently but it need to start immediately when user need to make emergency communication.
If this app is not used for a month, it uninstalled by "Offload unused apps" feature. Is there way to put a flag into app to prevent uninstall?
If application's Info.plist has setting like "Preventing offloading unused apps", it would be great to me.
There’s no documented setting for that. Imagine if there were: many apps would use it and thus defeat the purpose of the offload feature.
For now your best bet is to advise the user to disable the global offload feature, with a detailed explanation of the motivation for doing so. But it’s still the user's choice.
You could also file a Feedback requesting support for this, such as a hard-to-get entitlement for apps like yours.