Semaphore
v4.0.0 · 20.4 MB · code 17
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File information
UpdatedJan 5, 2026
PublishedApr 26, 2022
Packagecom.goss.sem
Versionv4.0.0 (17)
Size20.4 MB
MD5a2c0e4e491cef4a0c84ae3e1ba8719fe
Min SDK24
Malware scanTRUSTED
Signature SHA142:45:98:45:5C:E8:E0:28:F0:C1:79:41:4C:F6:78:B5:07:C8:03:B4
SignerCN=Piotr Goss, L=?wi?ta Katarzyna, C=55-010
Total downloads50,000
This version50,000
DeveloperStowarzyszenie Koleje Wirtualne
Age ratingEveryone
What's new in v4.0.0
New features:
- React JS library,
- night mode + signal response to mode,
- English language,
- semaphores layouts,
- selection of signals, indicators from a list,
- zoom graphics,
- guidance/help,
- signal Sz,
- fixed warning and shunting dial,
- train signals from switch,
- signalling cooperation,
Changes:
- Application UI,
- grouping of indicators,
- new sounds,
- shaped semaphore has the possibility to display signal Sz,
- change of application icon,
- React JS library,
- night mode + signal response to mode,
- English language,
- semaphores layouts,
- selection of signals, indicators from a list,
- zoom graphics,
- guidance/help,
- signal Sz,
- fixed warning and shunting dial,
- train signals from switch,
- signalling cooperation,
Changes:
- Application UI,
- grouping of indicators,
- new sounds,
- shaped semaphore has the possibility to display signal Sz,
- change of application icon,
Security scan
TRUSTED
- Developer signature verified 2026-01-05
- Signature SHA1 42:45:98:45:5C:E8:E0:28:F0:C1:79:41:4C:F6:78:B5:07:C8:03:B4
- File MD5 a2c0e4e491cef4a0c84ae3e1ba8719fe
How to install Semaphore v4.0.0 on Android 7.0 Nougat+
Takes about 2 minutes. You'll need roughly 20.4 MB of free storage.
- Grab com.goss.sem_17.apk — hit the Download button above (20.4 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches a2c0e4e491cef4a0…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.goss.sem_17.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Piotr Goss, L=?wi?ta Katarzyna, C=55-010. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Semaphore — tap Open on the install screen, or find the Semaphore icon in your app drawer.
Common install errors for Semaphore
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android 7.0 Nougat or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.