Test page
Measurements taken on this device, because the answers differ from one to another and a desktop cannot stand in for an iPad. Nothing here changes your photos or your settings, and nothing is sent anywhere. Each test says what it means underneath the number.
Diagnostic report
Facts about this device and this build. Copy it into a message when something is wrong — it carries what a screenshot cannot.
Speed
These are the numbers that decide whether the editor feels quick on this device. They take a few seconds and the page will be busy while they run.
Measure a lens
This moved into the app itself, because a lens has nothing to do with any one photograph and this page is for when something is wrong. It is on the start screen as Measure your lens…, and in the Corrections tab beside the hot-spot sliders. Nothing needs to be open first.