Before you proceed, you must understand the risks involved in sideloading IPAs:
The number 1255 is highly suspicious. Apple has never released iOS version 1255. The latest public versions of iOS are numbered in the 18.x or 19.x range (as of 2026).
So where did 1255 come from?
Regardless, no official Facebook IPA is labeled for “iOS 1255.” Treat any site offering it as high-risk.
AltStore is currently the most reliable way to sideload apps without "jailbreaking" your device. facebook ipa for ios 1255
Note: Free Apple IDs require you to refresh the app every 7 days via AltStore, or the app will crash upon opening.
If you’re stuck on an older iOS (like 12.5.5 or 12.5.7 — note the dots, not 1255), here’s what actually works: Before you proceed, you must understand the risks
If you have previously downloaded Facebook on your Apple ID in the past, you might not need an IPA file at all.
| Approach | Safety Rating | Success Rate | Recommendation | | :--- | :--- | :--- | :--- | | App Store (Old Version) | 10/10 | 90% | Do this first | | Jailbreak + IPA | 5/10 (Security risk) | 60% | Only for tech experts | | Random Website Download | 0/10 | 2% | Never do this | The number 1255 is highly suspicious