Pixel Game looking Blurry on IOS

well on my brothers ios 8 ipod its always blurry. wen i switched to ios 9 it wen sharp so updating might fix it, altho i personally never recommend updating unless u absolutely hav to. funny thing is i actually WANT mine to be blurry, as i thought it looked better that way, but can't seeing as i cant roll back to ios 8

& it went sharper on all non fusion apps on my device wen i updated.

You should also list the iOS version and device you are testing on. iPhone6+, for example, will make all pixel art blurry no matter what, because Apple thought it was a good idea to do auto-downscaling of the screen at runtime. But on a side note, I have had testers report a problem where the device will be blurry when the device is unplugged, but becomes crisp when plugged to a mac. I am guessing it ia power saving feature that is enabled or disabled based on where the device is drawing power from. I would be curious if this is just a glitch due to iOS9 and Fusion needing an update.

So, my testers are reporting this bug consistently with some iphone5 series devices. This includes iphone5, 5s, 5c and SE. The report I got was:

Here is a listing of the devices with the respective iOS versions, the resolution and RAM.

On following devices the graphics are displayed properly:
1. iPhone 5 - iOS 9.2.1 - 640 x 1136 - 1 GB
2. iPhone 5c - iOS 7.1.2 - 640 x 1136 - 1 GB

On following devices the graphics are displayed blurry:
1. iPhone 5s - iOS 8.2 - 640 x 1136 - 1 GB
2. iPhone 5s - iOS 8.4.1 - 640 x 1136 - 1 GB
3. iPhone 5s - iOS 9.3.2 - 640 x 1136 - 1 GB
4. iPhone SE - iOS 9.3 - 1080 x 1920 - 2 GB

Additional information on the blurry devices:
1. When you just return from sleep mode it looks sharp for a moment.
2. When you adjust the volume using the volume buttons to the left it looks sharp for a moment.
3. When you receive a Game Center pop-up it looks sharp for a moment.