Verification on phones.
WHAT DIFFERS FROM OTHER PLATFORMS
Interruption is constant Connectivity varies Devices vary enormously Permissions can be refused and revoked Updates reach users slowly
WHAT TO TEST SPECIFICALLY
Rotation during a task Backgrounding and returning after a long period Termination and relaunch Incoming calls and notifications Permission granted, refused, and revoked later No network, and slow network Low storage and low battery Largest system font size Upgrade from the currently released version
WHY UPGRADE TESTING MATTERS MOST
It affects existing users, who have data, and failure on launch is unrecoverable for them.
WHAT DEVICE COVERAGE SHOULD PRIORITISE
Devices your users actually have.
WHAT TO ALWAYS INCLUDE
A modest device, which reveals what better ones conceal.
WHAT EMULATORS CANNOT VERIFY
Performance Battery consumption Camera and sensors Real network behaviour
WHAT DEVICE FARMS PROVIDE
Breadth across models remotely.
WHAT THEY DO NOT REPLACE
Holding a device and using it.
WHAT TO TEST BEFORE EVERY RELEASE
The release build, on physical devices.
