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 ...

Phone background app refresh secretly drains data and inflates bills, but disabling this hidden setting can cut monthly costs by $10-30 instantly.

Background activity can drain your battery and use your mobile data without you seeing it happen. Apps refresh in the background to keep content updated, which helps you pick up where you left off.