Some of these directions apply to all iPhones, but some are only relevant to specific iOS versions. These differences are pointed out below. The most common way to keep apps updated on your iPhone is ...
MSN on MSN
My Android apps update before the Play Store gets them — this one tool made that possible
Finally, my open-source and non-Play Store apps auto-update.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results