Think of Cydia like "Terminal + apt-get" on Linux, not the App Store.
Once a device is jailbroken, Cydia becomes the primary interface for downloading and installing tweaks and apps, often utilizing the Debian APT system. cydia install download ipa
| Problem | Likely Cause | Solution | |--------|-------------|----------| | "Unable to install Cydia" after unc0ver | Unc0ver version mismatch | Reboot, re-sideload unc0ver, turn on Airplane Mode. | | IPA install fails in Filza | AppSync not installed or outdated | Reinstall AppSync from Karen’s repo. | | App crashes immediately after install | Incompatible jailbreak detection or missing dependencies | Install "Shadow" or "Liberty Lite" from Cydia to bypass detection. | | AltStore says "No available developer mode" | iOS 16+ requirement | Enable Settings > Privacy & Security > Developer Mode. | | Sideloaded app stops opening after 7 days | Certificate expired | Open AltStore, tap "Refresh All" (needs Mac/PC). | Think of Cydia like "Terminal + apt-get" on
To access more apps, you can add third-party (repositories) under the Sources tab. 3. Modern Alternatives (2025-2026) | | IPA install fails in Filza |