Is iSpindle Plotter safe?

iSpindle Plotter is a self-hosted companion app for the iSpindel — an open-hardware floating hydrometer used by home brewers to track specific gravity through a fermentation. The app runs a small HTTP server on your phone that the iSpindel posts its readings to over your local Wi-Fi network, then stores, charts, and analyses those readings without ever sending your data to a third-party cloud ser…

Developer: Ian Williams
Category: Science & Education
Earliest archived version: 20 Jun 2026
License: MIT (per F-Droid metadata)

02 / Release notes

Release notes from F-Droid

08 Oct 2026

0.5.24

Added a drag-select for marking bad data, and spunding guidance on the fermentation stage card. Mark bad data: press and drag along the graph to select a time range — for readings recorded while the spindle sat out of the wort, or across a WiFi gap — and mark it. Marked spans show as a shaded band…

Full notes →

20 Jun 2026

0.5.23

Detects the yeast-settling stage at the end of a ferment. Once fermentation finishes, the yeast flocculates and drops out of suspension. Because the iSpindle floats in the clearing upper layer, the gravity reads a small step down — a couple of points — at steady temperature, before any cold crash.…

Full notes →

03 / Package identity

Technical fingerprint

Application IDcom.ispindle.plotter

Latest APK SHA-25623ecd5dcb6b3b501b8efb5dc43b3cb6ffe0123e51e35b02d64732a20b2a8b44b

Signing certificate8C:8F:3B:16:72:78:A1:79:91:1B:AD:87:52:45:F2:1D:AC:46:48:2F:90:13:18:A2:16:1A:88:72:65:A2:D3:B5

MIN ANDROID24TARGET35ARCHITECTUREarm64-v8a · armeabi-v7a · x86 · x86_64

04 / History

Archive history

2 versions in WIKI archive: earliest 0.5.23 (20 Jun 2026), latest 0.5.24 (08 Oct 2026).

No change in android.permission.* between 0.5.23 and 0.5.24.

05 / Version archive

Documented releases

2 TOTAL

VersionReleasedAndroidArchitecture

0.5.2408 Oct 202624+arm64-v8a, armeabi-v7a, x86, x86_64→0.5.2320 Jun 202624+arm64-v8a, armeabi-v7a, x86, x86_64→

06 / Safety & access

Safety verdict

Authentic — file hash matches the source indexNo ads or tracking flagged by the source

IntegritySHA-256 verified vs source

SourceOpen-source · fdroid

Permissions13 declared · 1 sensitive

Signaturepresent

Anti-featuresNo known anti-features

Sensitive accessACCESS_FINE_LOCATION

Declared permissions

android.permission.ACCESS_FINE_LOCATION android.permission.ACCESS_NETWORK_STATE android.permission.ACCESS_WIFI_STATE android.permission.CHANGE_NETWORK_STATE android.permission.CHANGE_WIFI_STATE android.permission.FOREGROUND_SERVICE android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE android.permission.INTERNET android.permission.NEARBY_WIFI_DEVICES android.permission.POST_NOTIFICATIONS android.permission.RECEIVE_BOOT_COMPLETED android.permission.WAKE_LOCK com.ispindle.plotter.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Tracker status: Not assessed by WIKI for Android.

07 / Sources

Evidence ledger

Each entry is a captured public reference backing this record.

RepositorySource package page↗Source codeSource repository↗