ContrastChart at Mac App Store analyse

App power index: 100 (based on ranks around App Stores today)
Health & Fitness Medical
Developer: Nasanen
Price: 0 free
Current version: 1.0, last update: 8 years ago
First release : 25 Apr 2012
App size: 5.37 Mb
4.3 ( 63 ratings )
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Estimation application downloads and cost

> 2.2k
Monthly downloads
~ $ 900
Estimation App Cost


Contrast Chart is an interactive number and letter contrast sensitivity test. With Contrast Chart, human visual contrast sensitivity can be evaluated quickly and easily.

Contrast sensitivity of the visual system refers to the ability to see low contrasts, i.e. small differences in brightness.

Good contrast sensitivity is particularly important in difficult viewing conditions, which can reduce the contrast of the scene. One may encounter such viewing conditions when driving in dense fog, heavy rain, in the glare of the lights of oncoming traffic at night, or in the glare of sunshine during the daytime, for example.

The app produces randomized sequences of number or letter images with decreasing contrast as shown in the screen shots. The number of possible character sequences is huge.
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Available in countries
Country Price
Canada free
China free
France free
Germany free
Italy free
Netherlands free
Portugal free
Spain free
Poland free
UK free
India free
Japan free
Korea, Republic Of free
Poland free
Russia free
Turkey free
USA free
Korea, Republic Of free
Ukraine free
Available for devices
iPadWifi, iPad3G, iPad2Wifi, iPad23G, iPadThirdGen, iPadThirdGen4G, iPadFourthGen, iPadFourthGen4G, iPadMini, iPadMini4G, iPadAir, iPadAirCellular, iPadMiniRetina, iPadMiniRetinaCellular, iPadAir2, iPadAir2Cellular, iPadMini3, iPadMini3Cellular, iPadMini4, iPadMini4Cellular, iPadPro, iPadProCellular, iPadPro97, iPadPro97Cellular, iPad611, iPad612, iPad71, iPad72, iPad73, iPad74,