Some apps won't download on my iPhone 6 because of the iOS?
I want to your help me work on my iOS
[Re-Titled by Moderator]
iPhone 6, iOS 12
Your iPhone 6 can only update as far as iOS 12.5.7 There are not many apps available for that iOS these days.
Here are two different ways to ensure the highest iOS that your device will support is installed on your device.
Update your iPhone, iPad, or iPod touch wirelessly. Click here --> Update your iPhone or iPad - Apple Support
Here are instructions about how to update your iPhone, iPad, or iPod touch with the Finder on a Mac computer --> Update your iPhone, iPad, or iPod touch with the Finder - Apple Support