The Eye Check app is intended to encourage people to look after their vision and eye health.
According to Boots it is not designed to replace routine check-ups by an optometrist, but will explain and demonstrate some of the checks involved in a professional eye examination.
It includes four checks that can be completed in minutes. Results are presented in a pass/fail or percentage format rating for both the left and right eye.
The Coca-Cola Christmas app, which lets people create a virtual snow globe, has climbed five places to number 10.
The chart is powered by analytics app developed by with non-commercial branded apps removed.