e
Install err
Download Zapstore
Download
- Scan the code with your phone’s camera
- Tap Download anyway if the browser warns about the file
- Allow your browser to install unknown apps if Android asks
- Open Zapstore and finish the onboarding
Open err in Zapstore
Open
- Scan the code to open err in Zapstore, or search for it there
- Tap Install, and Download if Zapstore asks you to confirm the developer
- Confirm in Android’s install dialog. Allow Zapstore to install unknown apps if Android asks
Local-first editor for worldbuilding and narrative work. Items form a graph with typed links, while Tree Views offer saved starting points. Supports properties, computed values, undo/redo, and encrypted QR sync between devices.
err is a local-first editor for worldbuilding and narrative work.
- Items form one graph; multiple parents and typed links keep related material together.
- Tree Views are saved starting points into that graph.
- Properties, computed values and undo/redo are part of the Item workflow.
- QR sync moves changes between devices with end-to-end encryption.
- Runs as a Web PWA and a native Android app.
The vault stays on your device. Learn more at https://err.tokyo.
Summary generated by Zapstore from source.
Original description, as the developer published it.
Latest release
Nov 8, 2026
Claimed app
Differs from source
Google servicesNo source
- Differs from source. The APK has ML Kit, which the source never references.
Camera access has no shown use.
Permissions
- Camera CAMERA Take photos and record video CAMERA
Includes Google Play services.
Release notes
- The editor footer now shows a character count instead of a word count.
- Large vaults load, expand and search much faster: a reload no longer reads every note body, tree levels load in one request, and search runs in the engine with a short snippet around the match.
- Web: the OPFS storage-usage repair no longer leaves DevTools reporting an enormous size, and release builds log when a repair runs.
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