At launch, in early 2022 in the US, it will cover replacing the batteries, screens and cameras of recent iPhones.
But Apple's new repair store will sell more than 200 parts and tools.
It comes after months of increasing pressure on Apple from the grassroots right-to-repair movement, which wants individuals and independent repair shops to be able to fix electronics.
"Self Service Repair is intended for individual technicians with the knowledge and experience to repair electronic devices," Apple said.
But "for the vast majority of customers" visiting a certified professional repair shop would be a better option.