This app was mentioned in 3 comments, with an average of 1.00 upvote
I use something called "swift" which does a totally passable job as a facebook/ messenger interface, using the mbasic site as the backend.
Edit: https://play.google.com/store/apps/details?id=hfast.facebook.lite&hl=en_GB
Just released an alternative app for Facebook Lite called: Swift for Facebook Lite. It has all basic features from official Facebook and Messenger app. Fast and reliable notifications. No background work -> reduce batter usage. Just 6MB. Basically it is web wrapper with some Android and javascript code. Play Store: https://play.google.com/store/apps/details?id=hfast.facebook.lite I can assure it consume less battery than all other competitors and official apps (of course.) Please take a look and let me know is there any thing I could improve. Thanks.
I don't have Facebook I have a web wrapper for it called Swift for Facebook Lite