It's optimized and not blurry on my 6. Do you maybe have zoom turned on?Why the calculator app build in iOS is still not retina optimized on iPhone 6? The app looks blurry, just as every other iPhone 5 app upscaled to iPhone 6 resolution
Hm, settings seems to be as usual. No idea what to change.it looks sharp on my 6s. I have the display zoom set as standard though. OP might wanna check your display zoom settings?
This might explain why: https://www.macrumors.com/2015/10/01/zoom-display-bug-iphone-6s/I have the exact same issue on my 6s, but not only with the calculator app. Wallet shows the same strange "zoom" and the cards in there are way too big for the screen, so I can't use them. I already tried it with a restart and switching between zoom/standard zoom display. Nothing helped so far...
I do see a difference in the screenshots. Definitely a software bug.
I couldn't see the difference on my phone, but after looking at the pic on my iMac, I do see a slight difference, but not much.