This checklist is what the in-app review uses (see Review brief). You can also use it when reviewing someone else's work.
Does the flow solve the stated job? What would you measure to know it worked?
Will people know where they are, what happens next, and how to recover?
What is primary vs secondary? Is anything fighting for attention?
Empty, partial, permission denied, slow/offline, validation, irreversible actions.
Patterns vs one-offs; naming and components vs the rest of the product.
Contrast, touch targets, motion, copy clarity, localization where relevant.
Where engineering or policy might push back; MVP vs phase two.
One tight storyline: tradeoffs, recommendation, and what you need from the room.