This is the most critical factor. Old versions of apps lack the latest security patches. A vulnerability discovered and patched in version 300 might still be open in version 100. Using an outdated IPA could potentially expose your chat logs or account data to security risks.
Are you frustrated with the current state of Facebook Messenger? Massive app updates often introduce unwanted bloat, battery drain, lag, and cluttered interfaces filled with tabs you never use. For users of older iOS devices, a new update can even render the app completely unusable. messenger old version ipa