I have just upgraded my project to unity 5, before i did my project was building at 48.2mb. however after building the project in unity 5 the apk size has increased to 69.7. I noticed that when i used the unity pro 30 day trial to build my project in unity 4 the same thing used to happen. I have klept all of the settings the same but i cant figure out where this extra ~20mb of data is coming from. Could anyone point me in the right direction on how to reduce the build size?
You didn’t mention the version of Unity you were using before the upgrade.
This is probably because now the default build is FAT (ARMv7 + x86). Try setting ARMv7 only in the Player settings and check again (but in that case you won’t have native support for x86 devices).