I am moving from iPhone 4 to iPhone SE. I have a web app on my iPhone 4 that was added to the home screen.
After restoring iPhone 4 backup on the iPhone SE I see this Web App but its size is constrained to the size of the iPhone 4 screen while displayed on the bigger iPhone SE screen.
Is there any way to "recalculate" the size of the Web App without removing/installing it again? I am using LocalStorage a lot in this web app and if I remove it from the home screen I will loose it all.
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Do you have a startup image for your web app? The last time i worked on a web app (some years ago) I discovered that the startup image resolution decides the resolution for the rest of the app(!).
See this SO question for startup image HTML syntax for multiple devices.
I hope this helps.
So apparently when you add a Homescreen bookmark - you get a simple iOS app (with a single WebView probably) which is not converted when you restore if from backup on a device with bigger screen.
In my case I had to reinstall it on my new device in order to have a full screen app version.