RootlessDEB
Jailbroken devices
Rootless ElleKit package for iPhone and iPad. Install it with a package manager and restart Isaac.
DownloadRepentance on iOS · Steam Cloud · Achievement sync
Your progress.
Across platforms.
Connect Isaac on iPhone or iPad directly to Steam. Bring your Steam progression to iOS, publish a finished iPhone session with Sync Now, and add missing Steam achievements from your native saves.
Direct to SteamQR/Steam Mobile or credential login with Steam Guard
You chooseManual uploads and explicit first-sync or conflict choices
Unlocks preservedAchievement updates only add missing Steam unlocks
Downloads
Choose your installation.
Get the latest release for your setup. Download buttons follow the newest GitHub release as updates are published.
Latest release available on GitHub
EmbeddedDYLIB
Non-jailbroken devices
Place the dylib in the app’s Frameworks directory, add its load command, and sign the complete app.
DownloadVerificationSHA-256
Release checksums
Check downloaded release files against the published SHA256SUMS manifest.
DownloadThe embedded core requires no desktop companion, Steam desktop client, JIT, or permanent background daemon. All release files and notes.
Features
Cloud sync with your progress in mind.
Native account, sync, backup, conflict, and log panels keep the workflow inside Isaac. Offline play remains available.
Direct Steam authentication
Sign in with QR approval in Steam Mobile or credentials and Steam Guard. Renewable session tokens are stored in the iOS Keychain.
Steam Cloud progression
Synchronize Repentance’s three persistent save slots with AppID 250900, including native iOS-to-Windows save normalization.
Additive achievements
After a successful manual Sync Now, add achievements unlocked in iPhone saves that remain locked on Steam. Existing Steam unlocks are preserved.
Controlled publication
Remote-only changes can be pulled before slot selection. Finish an iPhone session and tap Sync Now to publish stable local progress.
Versioned backups
Local and remote versions are backed up before replacement, with retention and restore controls available inside the game.
Verified sync decisions
Three-way comparison detects first sync and genuine conflicts. Downloads and uploads are hash-verified before the common sync state advances.
How sync works
One shared baseline. Clear choices.
Compare the iPhone save and Steam save with the last verified common version. If both have changed differently, choose which version to keep.
iPhoneYour local persistent progression, normalized to Steam’s save format.
Common baselineThe last version verified to match on both sides.
SteamAppID 250900 cloud progression, verified after each upload.
Only Steam changedPull before play
Only iPhone changedTap Sync Now
Both changed differentlyYou choose
Usage
Bring Steam progress in. Send iPhone progress back.
Automatic launch and foreground checks never upload. Manual Sync Now publishes a finished iPhone session after the save becomes stable.
Connect your Steam account
Open Steam Sync from Isaac’s menu and sign in. The settings button and panel hide automatically during a run.
Choose the first save
Select Use iPhone Save, Use Steam Save, or Cancel on first sync. Both available versions are backed up before a replacement.
Sync after playing
Return to the menu and tap Sync Now. The core verifies the upload, then adds eligible missing Steam achievements.
Requirements & credits
Persistent progression, with verified backups.
The current release was tested with native Isaac App Store version 1.4 and Repentance. Synchronization covers progression rather than a run currently in progress.
iOS 15 or newer
ARM64 iPhone or iPad with com.Nicalis.Isaac-iOS. Rootless and embedded installations share the same core.
Repentance saves
The three rep_persistentgamedata slots map to Steam AppID 250900. Active-run and rerun state files are excluded.
Account and network
Steam authentication and cloud operations connect directly to Valve. Offline play does not block game startup.
App signing
Back up application data before re-signing. The signing workflow can affect containers, Keychain access, receipts, and purchased DLC access.
An unofficial project, unaffiliated with Valve, Nicalis, or Apple. No game application, DLC, saves, credentials, or DRM bypass is included.