+ 100% freeware
+ awesome old school feel for 8-bit nerds
- not so long time ago, after one of the updates, application "converted" to antivirus!! It seems to be a malware.
- no real battery saving, application applies some sort of grid mesh to your screen and don't turn off AMOLED pixels for sure.
After such updates i use this application only when i want oldschool pixelization effect.