I don't know much about app development, but I was curious and downloaded the Albert Heijn apk for ARM64. Inside the apk, the three largest entities are:

- libflutter.so 140 MBytes (flutter, obviously)

- flutter_assets 29 MBytes (this is a directory. The name is a bit misleading because it mostly consists of AH-specific icons.)

- libapp.so 20 MBytes (also related to flutter, I think)

There is a 640 KByte json file in the assets that stores an animation in base64 format. Now you know what the CPU and storage resources of your devices are used for nowadays...