TechRadar.com: Datacolor Spyder4 Express review
By Matt Golowczynski
Published Mar. 14, 2012
The Datacolor Spyder4 Express monitor calibration tool marries straightforward operation with extensive display compatibility. It can be used with standard LCD, LED and wide-gamut displays, and OLED panels and iPhones and iPads.
The Spyder4 incorporates a seven-colour sensor, which promises more accuracy over the Spyder3, while double-shielding over the colour filters is said to stop colours changing over time.