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build 7
GridlessSEKAI Retro by UntitledChartsDevelopment by YumYummity / @prodeodeWebsite by @nyxgoober
Gridless SEKAI Retro
Offline Archive · JP v2.8.0 · 2023
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Changelog — Build 7
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Updated IPA and APK links
Added Menu Selection screen before the install guide flow
Added FAQ with 12 questions and smooth accordion expand animations
All popup transitions now use particles + white flash for consistency
Reworked title corner items, replacing the random fake UID with credits
Removed "Install Guide" eyebrow from title logo because this site is now general-purpose
Fixed WebAudio falling back to HTML elements when served via Cloudflare Worker
Fixed popup-bd wrapper missing from DOM causing null classList errors
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Menu Selection
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Frequently Asked Questions
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Yes. The APK and IPA are from the GridlessSekai-Retro repository. Assets come from the official JP v2.8.0 game archive hosted on Internet Archive. No accounts, no trackers, no sketchy APK sites.
The assets archive contains every song, jacket, card, and Live 2D model from the snapshot. It's a complete offline copy — no CDN, no streaming. You only download it once.
No. Once the assets are in place and the first-launch indexing finishes, the game runs entirely offline. No login, no servers.
Yes, that's just the app scanning and indexing the local archive you placed. It's not actually downloading anything — it's reading the ZIP you moved into the app's folder. Leave it alone until it finishes.
Your signing certificate was revoked by Apple. Re-sign the IPA with a fresh certificate using whichever sideloading method you used before. Your assets are safe — you don't need to re-copy them.
No — and this is important. The app reads directly from the ZIP file. Extracting it will break it. Move the ZIP as-is into the app's data folder and leave it zipped.
Usually means the ZIP is in the wrong folder, was extracted, or is corrupt. Double-check the file is in the correct path for your method and hasn't been renamed. On iOS, also make sure you launched the app once before copying assets.
Not directly. The app targets Android and iOS only. You could try running the APK in an Android emulator like BlueStacks, but this isn't officially supported and performance may vary.
This is a snapshot of the Japanese version at v2.8.0 from 2023. Global content added after that point isn't included. The UI is in Japanese but most rhythm game controls are universal.
Progress saves locally on-device only. There's no server sync, so data won't carry between devices. Back up your save file manually if you plan to reinstall or switch devices.
No. All online features including multi-live are disabled since there are no servers. Solo play and all offline content are fully available.
Yes. All songs, cards, costumes, and content available in the JP v2.8.0 snapshot are pre-unlocked. No grinding required.
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Platform Selection
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Which platform are you installing on?
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Method Selection — Android
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How do you want to transfer the assets?
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Method Selection — iOS
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Which sideloading tool are you using?
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WAIT!
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This method is a LAST RESORT if you're REALLY sure you don't have a PC!
This method can get your device permanently blacklisted from sideloading using this certificate, requiring a factory reset to sideload with this method again. You can still sideload with a PC if you get blacklisted.