Define What the App Must Do

Turn a vague request such as “find a good app” into testable requirements for function, privacy, compatibility and cost.

Core ideas

Use these points to build an accurate technical model before changing the device.

• Separate essential features from optional preferences.
• Record offline needs, account requirements, file formats and export options.
• Set unacceptable permissions, trackers or subscription conditions before searching.

Decision rule

A clear requirement list prevents ratings and advertising from deciding on your behalf.

Apply it on your phone

Record the device facts, source and expected result. Make one reversible change, observe the outcome, and keep the evidence needed to undo it.