The latest stable version is v6 (released March 2021).
Requires Sideloadly (preferred) or Cydia Impactor to install the Phoenix IPA on a computer, then signing it with an Apple ID. Phoenix Jailbreak
On your device, go to Settings > General > Device Management and trust your Apple ID. The latest stable version is v6 (released March 2021)
Disclaimer: Jailbreaking carries risks, including system instability or crashes. Always backup your device first. Phoenix Jailbreak
If the app expires (usually weekly), you must reinstall it using your computer. Steps to Jailbreak with Phoenix (Mac/PC): Download: Get the Phoenix 6 IPA file and Sideloadly.