Sticky Notes is the floating application and ultimate application to create sticky notes and reminders on your Android device.
Sticky note is floating on top of all other apps! Easily dock them to the left side to keep your screen real-estate at full potential. Useful for quick note taking. Closing a note will delete its text. All stickies are auto-saved!
Keyword: floating memo, Notes, floating notes, notes on screen
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Pro version without ads and no permission set up need. Please check out at

https://play.google.com/store/apps/details?id=com.stickies.paid
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Please used lite version if you have problem with permission android M up
Lite version without permission set up need and lơ memory. Please check out at

https://play.google.com/store/apps/details?id=com.lite.stickies
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Note for normal version
With android 6.0 up (Android M up) please enable permission write to SD card to save sticky note.
Bellow is step.
Settings -> application manager -> Sticky notes
Permission -> Turn on Storage.

Improvement performance
Ads optimization for better user experience