The best option in my opinion is the medium one as it maintains the smooth performance of iOS. The tweak also doesn’t recommend users to set the resolution to small on some unsupported devices as it might cause glitches and bother the eyes.
Keep in mind that once you change the resolution, it applies to most parts of iOS such as the Settings pane, conversations in the Messages app etc., but the App Store maintains its original resolution regardless of the zoom option you choose.
LittleBrother is a solid tweak that brings the zooming feature of the new iPhone models to older ones. If you’re interested to give it a try, you can purchase it now from Cydia’s BigBoss repository for $1.99.
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