To help you deal with eye strain problem, the 20-20-20 rule suggest that after every 20 minutes, you (the computer user) should take a break for at least 20 seconds and look at objects that are 20 feet away from you.
This 20 20 20 Android APP reminds you every 20 minutes to take a short break about 20 seconds.
It's easy to use.
Available on English and Chinese.
Fixed Notification Popup when screen on.
9Apps 4.9
