Historically, BigBoss acted as a central repository that curated dependencies. With the decline of BigBoss as an active curator, users rely on "replication repos" or developer-specific repos. This fragmentation leads to "Dependency Hell," where Repo A requires PreferenceLoader 2.2 while Repo B only hosts PreferenceLoader 2.6, which is incompatible with iOS 9.
A review of repos for 9.3.5 is incomplete without mentioning the jailbreak tool itself.
iOS 9.3.5 uses Cydia Substrate (formerly MobileSubstrate). Many new tweaks assume Substitute (iOS 11+). If a modern tweak fails, look for a "Legacy" or "iOS 9" branch inside the UPD repos. The community repo ios935tweaks.github.io often hosts these forks. Cydia Repo Ios 9.3 5 UPD
A common issue on iOS 9.3.5 is that Cydia’s package list becomes corrupt after adding multiple UPD repos. Symptoms include blank "Changes" or missing search results.
Fix:
Before adding any repo, you must jailbreak using Phoenix (for 32-bit devices) or HomeDepot (for some iPads). As of 2026, the only reliable method is:
Once jailbroken, immediately open Cydia and let it prepare the filesystem. Do not add any repos until the initial "Completing Setup" process finishes. Historically, BigBoss acted as a central repository that
Because iOS 9.3.5 is temperamental, here is the exact safe method to add a repo without crashing Cydia: