This app was mentioned in 5 comments, with an average of 2.60 upvotes
IMO I wouldn't use any of those, but I guess CM Locker does have some features that are hard to replace. I don't use a lock screen so maybe someone else would recommend a good replacement.
Browser replacements:
Cleaning replacements:
Security replacements:
I've already answered this here: https://www.reddit.com/r/AndroidQuestions/comments/41eqaz/overzealous_memory_managementno_gmail/cz208kw
TL;DR: The LG G Stylo has only 1 GB RAM, which isn't sufficient for efficient multi-tasking on an Android phone in 2016.
In continuation from my reply, you could also try using a lightweight web browser, such as UC Browser Mini, or Opera Mini. Opera Mini has the advantage of extreme data compression (like pages are reduced by 90% of their size!), so it should benefit when you're in an area with poor coverage.
PS: If this answers your query, please reply with "Solved". Thanks!
How about a few browsers?
UC Mini: https://play.google.com/store/apps/details?id=com.uc.browser.en
Opera Mini: https://play.google.com/store/apps/details?id=com.opera.mini.native