The plain-English version
The degree to which supported platforms deliver equivalent intended capabilities.
Why it matters
Parity should be described by user outcomes rather than identical pixels or identical internal APIs.
Let’s make it click
Both phone apps can create, edit, and recover a note even if their share controls look different.
Vibe Bro’s heads-up
A capability implemented on one platform does not establish that the other implementation is complete.
The docs behind it
Documentation links checked .
Editorial review · October 28, 2026
Supported: Flutter distinguishes automatic OS adaptation from design decisions requiring explicit platform handling. The outcome-based parity checklist is original guidance.