Screen calibration required for app development?

I don't see a real need for it if you're just doing app creation. If you were doing print design or color correcting video (or things where exact color is extremely important), then it'd be necessary. If your app having the exact color you want on every screen everywhere is important to you, go for it. If it doesn't matter all that much, then save your money.

 

What screen do you have?
Most IPS/PLS/MVA screens today are very well sRGB calibrated out of the box, and sRGB is the default App reference colour space. This includes TB displays, iMacs, Retina Macbooks and iThingies.
If you have a TN panel: ditch it and get an IPS/PLS/MVA one.

 

I would like to ask something about this topic too.

Which "Display profile" have you set under System Preferences -> Displays -> Color?

 

A decent calibrator for a professional is $250. There are ok ones for less.

If you think you need one, get one.

 

There is significant variation between displays, and they also shift over time. A big problem with TN is that they tend to have narrower viewing angles. A small change in head position can make the image on screen appear different.

 

First of all, congratulations on using Sketch app. It is the best app for the purpose by a wide margin!!

Calibrating your screen accurately using hardware is more relevant for print work, where your colors need to match between screen and printer. For general app development, what you get out of the box should be close enough.

What you can do is run the basic software calibration tool found in:

System Preferences > Displays > Color > Calibrate…

This should ensure that your screen is giving you the optimal image for your particular surroundings (lighting, etc.)

For app design, by far the most useful thing to do is see your designs previewed on a device. For that, the excellent Sketch Preview app is available for iPhone and iPad. It allows you to see your current art board (on your desktop) displayed on the device.

This tool is invaluable for understanding how your design will feel in your hand.

You can see immediately whether the fonts you're using are too small, for example. Or whether or not a button you've placed is in a convenient location to be pressed when holding the device with one hand… things that you can't necessarily gauge when looking at a flat design on a vertical screen at some magnification.

Good luck with your app design/development, don't forget to post back here (and on dribbble, etc.!) with some screen caps of your work!

 

don't mean to be totally pedantic, but you can't actually calibrate an iMac because there is no access to monitor controls for colour, gamma etc, only software ones. You can 'profile' your display using an ieye or simliar (x-rite), but all this will achieve is greater shadow / highlight accuracy (you may see more details in shadows and more texture in highlights), but really, unless you are doing photographic editing where you need to be able to interrogate this stuff - forget it.

Also - there is no way of profiling or calibrating iOS gear.