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Keepass2Android's apk is pretty big, e.g. when comparing to Keepassdroid. The main difference is that Keepass2Android is built on Mono for Android. Mono is an open-source implementation of the Microsoft .Net Framework (installed on pretty much every Windows PC). On Windows, the .net framework requires several hundred MB (but only once, not for every application). On Android devices, Mono is not installed globally. Instead, it is packaged into every app. The more features from Mono are required, the bigger the package becomes.

Here's a list of what is contained in the Keepass2Android 0.9.1 application package:

Mono for Android		
			.net dlls			5.0 MB
			Runtime				2.5 MB				
			Google libraries		0.8 MB				
			(for Drive support)

Resources		Strings, Icons..		2.1 MB				
Password Font						0.2 MB				
Java Code		including Dropbox 		1.1 MB				
				GDrive, SkyDrive
Keepass library						0.2 MB				
Keepass2Android Code					0.3 MB				
Java/Mono bindings					0.5 MB				
rest							0.3 MB		

TOTAL							13 MB

Last edited Nov 16, 2013 at 1:33 PM by PhilippC, version 3


anton21 Jul 21, 2016 at 3:51 PM 
Is there a reason this wasn't just developed in Android's Java SDK?

Propheticus Mar 24, 2014 at 3:57 PM 
13MB in size due to packaged framework functions is not a big issue IMO. Using up to 100MB while running in the background is...