Concept , Layout & Design-
Facebook mobile app concept is very non expected and if I will talk about layout & design then it is the same as on Facebook lite or facebook.com websites but in the term of compatibility and performance Facebook mobile app ie worstest app then their website and lite version.
Feature/functions & Usefulness-
Facebook mobile app is having all similar features of Facebook.com website and this us the best things and in the term of features and functions its useful but performance of all features and functions can not expressed in a word as it is too bad.
Bad performance of max of features use to irate the user.
Time to load, size & Other things-
Facebook mobile app use to take long time km loading and it's having arount 90mb size which is called a big size app for mobiles but other similar app like Facebook lite is covered around 100kb which is good and recommended.
I will never recommend to intall the Facebook mobile app if you are looking then I will suggest you to ho with Facebook Lite app.
