FM Go doesn't need to be installed.
So now the question is why will it not work on an iPhone is there is no FM Go installed ?
I have tried on three different phones. same result. I add fmGo, then it works.
On all the phones, the app appears on the screen as it should, but when I try open the app, I just get a blank screen. Normally the user and pass displays.
The App Maker database is use to create webclip for your databases that is installed on your ios device. Fmgo is not required to run the App Maker database which create webclips but FMGo is required to run the database that the webclip is pointed too. If you do not want to use FMGo then you will have to use the iosSDKApp. The iosSDKApp is free to Filemaker developer members which cost $99 a year. You will also need a Mac because it also requires xcode.
Method to run FM databases
Method 1: FMGo only
Method 2: FMGo with Webclip create with App Maker (Place icon on desktop) Window users only method to create icon ios.
Method 3: iosSDKApp requires Mac / xcode