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EUC State Of Health Analyzer

Analyze electric unicycle battery health from ride logs
New in version 1.5
Latest features:
- Enhanced support for older Android versions (up to Android 10)
- Enhanced legacy EUC World support
- Enhanced information section
- Unified charts - information section legend colors
- Updated PWM charts with standard limit lines: 60% green, 80% orange, 90% red
- Added DarknessBot dumps (.dbb) support, with limitations
Put your HTML text hereEUC SoH is a state-of-health (SoH) analysis tool for electric unicycles. It processes ride logs from popular EUC logging apps to estimate battery health, internal resistance, and long-term degradation patterns.

The app runs entirely on-device, without trackers or network access. It is fully free and open source under the AGPL license.

Main features:

  • Scan storage recursively to discover WheelLog and EUC World subfolders and CSV log files automatically (optional support for DarknessBot dumps).

  • Parse ride logs and separate accepted files from rejected ones, with explicit rejection reasons (e.g. too few data points, invalid Req computation).

  • Compute state-of-health metrics such as equivalent resistance (Req) and CUSUM-based indicators.

  • Display interactive charts (MPAndroidChart) to visualize resistance evolution and SoH trends over time.

  • Maintain per-wheel file management: inspect logs per wheel, exclude problematic files, and keep a clean dataset.

  • Export a structured archive for resale, expertise, or maintenance: PDF report (soh.pdf), statistics CSV, and associated logs organized by wheel identifier.

  • Share generated PDF and archives directly via messaging apps, email, or cloud storage.

  • Work fully offline: no account, no registration, no external server.



Typical workflow:

A - Your own wheel

  • Record rides using WheelLog, EUC World, or DarknessBot.

  • The app scans storage for folders containing compatible logs.

  • If using DarknessBot: export a dump (.dbb) and enable .dbb search in the app.



B - Purchased wheel with EUC SoH archive

  • Import the archive into the app.



Start analysis


  • Scan subfolders recursively to find compatible CSV files and group them by wheel.

  • Run SoH analysis to compute Req and related metrics.

  • Inspect charts to evaluate long-term battery degradation.

  • Review accepted and rejected log files.

  • Export a PDF report and structured archive for sharing or record keeping.



EUC SoH is intended for technically minded riders, enthusiasts, and repair shops who need transparent and reproducible diagnostics for electric unicycle battery health.

Based on: https://hal.science/hal-05553115
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Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 1.5 (14) suggested Added on Apr 23, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • android.permission.MANAGE_EXTERNAL_STORAGE
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • read phone status and identity
      Allows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • io.github.eucsoh.android.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 28 MiB PGP Signature | Build Log

  • Version 1.4 (13) - Added on Apr 16, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • android.permission.MANAGE_EXTERNAL_STORAGE
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • io.github.eucsoh.android.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 26 MiB PGP Signature | Build Log

  • Version 1.2 (9) - Added on Apr 14, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • android.permission.MANAGE_EXTERNAL_STORAGE
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • io.github.eucsoh.android.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 26 MiB PGP Signature | Build Log

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