For those who are looking for a direct download link, here are a few options:

These MOD versions allow the to work on non-Pixel devices, provided they meet the following minimum requirements:

: Captures truer highlights and deeper shadows without making the image look cartoonish or overly processed.

Based on your search for there is no single official app with this exact version string. It most likely refers to one of three common mobile software contexts: 1. Pixel Camera (Google Camera)

Before downloading Camera Version 9.0 21.0, ensure that your device meets the minimum system requirements: