A designer told me that he makes a design for iOS using 326dpi resolution. If he uses less, they will not look nice on iPhone and iPad screens (image blurry).
On Android, dpi value on the largest resolution is 518. In the past, I have tested exporting images from 72dpi and from 300dpi PSD files, and there was no difference on the screen. I never noticed blurry images. They were all perfect if I had exported them from the exact size of the device screen.
A few years ago, I searched on StackExchange sites an answer to this question, and I found a good article describing that dpi matters ONLY if we will print the design on the paper. For devices, it does not matter.
I lived by that rule for the last few years, but now I am completely confused that dpi started to matter.
Can anyone update me on the dpi issue? Can we create 72dpi designs for Android screens? Do we have to create 326dpi designs for iOS screens?