What's new in this version (3.0):

Version 3.0

- Now has it's own brightness controls for easier measurements at specific brightness levels.
Allows free 0-255 adjustment and fast presets for: 0% 25% 50% 65% 75% 100%

Version 2.2

- Better Phone/Tablet detection, improved layouts

Description

Screen Test Pattern Android Application:

by François SIMOND aka supercurio

This app display simple colors on your Android device screen.
Those colors are then measured by a colorimeter or spectrophotometer
in order to build graphs or color profiles.

I recommend using free software Color HCFR:
http://www.homecinema-fr.com/colorimetre/
but I guess alternative solutions like Calman or ChromaPure are fine.

Non-fullscreen pattern is intentional to help with measurement accuracy on displays with content-adaptive backlight/brightness control or brightness consistency issues when displaying large bright zones.
(This aspect can be improved)

Requirements:
- A computer
- A colorimeter or spectrophotometer

Features supported:
- Grayscale: 4-128
- Near Black: 4-10
- Near White: 4-10
- Saturations: 4-16

Application also has its own brightness level control

Source code:
https://github.com/project-voodoo/screen-test-patterns-app

See COPYING for license stuff.