Insufficient memory. First aids tried. Everything is tried! Pls help!
For insufficient memory

Disclaimer: Try at your own risk. I am not responsible for any data loss.  

Go to Settings > Apps.
* Select Google and Clear data (this clears the Google Search and Google Now Application data).
* Select Maps and Clear data.
* Select Chrome and Clear data (only if you have logged in to Chrome and made sure that all your bookmarks are synced to Google Servers).
* Select Google Play Services and Clear data.  

Disappearing apps

If the apps disappear, it may be because they are installed on the external SD card and may need more time to load.