How many people have successfully packaged an iOS game under 100mb?

Development Platform & Builds Mobile
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2

In your project’s target.cs file, make your SetupGlobalEnvironment() function look like this:


public override void SetupGlobalEnvironment(
	TargetInfo Target,
	ref LinkEnvironmentConfiguration OutLinkEnvironmentConfiguration,
	ref CPPEnvironmentConfiguration OutCPPEnvironmentConfiguration
	)
{	
	if (Target.Platform == UnrealTargetPlatform.IOS)
	{
		// to make World Explorers as small as possible we excluded some items from the engine.
		// uncomment below to make a smaller iOS build
		UEBuildConfiguration.bCompileRecast = false;
		UEBuildConfiguration.bCompileSpeedTree = false;
		UEBuildConfiguration.bCompileAPEX = false;
		UEBuildConfiguration.bCompileLeanAndMeanUE = true;
		UEBuildConfiguration.bCompileForSize = true;
		UEBuildConfiguration.bCompilePhysXVehicle = false;            

		UEBuildConfiguration.bCompileBox2D = false;            
		UEBuildConfiguration.bCompileCEF3 = false;
	}
}

Also, keep in mind that the download is going to be ~40MB smaller for iOS 9 users due to app thinning. The IPA generated by UE4 is universal and contains both 32-bit and 64-bit binaries, but iOS 9 will only download the one the device can run.