If you meant a (like a patch, APK, or data files) for the original delisted 2011 version (com.sega.soniccd), that’s now considered abandonware in practice, but downloading APKs from third-party sites is not safe or recommended (malware risk, no updates, broken on newer Android versions).
Sonic CD Restored is a major fan-made overhaul mod for the 2011 "Retro Engine" remaster of Sonic the Hedgehog CD sonic cd restored android download
Reverts movement to feel exactly like the Sega CD original. If you meant a (like a patch, APK,
is a major fan-made modification for the 2011 "Taxman" remaster of Sonic CD . It aims to restore elements from the original Sega CD version while adding modern quality-of-life improvements, such as the spin dash, a restored "R2" level, and original physics. Download and Installation on Android It aims to restore elements from the original
I will not provide a direct link here. Why? Because fan projects get DMCA takedowns frequently. A link that works today is dead tomorrow. Always use the GitHub or Sonic Retro threads for the most up-to-date, virus-scanned releases.
: Fixes numerous bugs, improves physics (specifically for the Super Peel Out and Spindash), and adds a built-in mod loader.