Keiser M Series
v4.5.1 · 106.9 MB · code 4050101
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File information
UpdatedMar 20, 2026
PublishedApr 12, 2021
Packagecom.keiser.mseries.app
Versionv4.5.1 (4050101)
Size106.9 MB
MD598a03d2e3eb98a3104dfddf03dba5229
Min SDK24
ABIsx86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA118:D1:C4:F6:61:71:61:B5:CB:BF:91:8D:8C:75:74:AD:06:9F:B8:8C
SignerCN=Unknown, OU=Development, O=Keiser Corporation, L=Fresno, ST=California, C=US
Total downloads100,000
This version100,000
DeveloperKeiser Corporation
Age ratingEveryone
What's new in v4.5.1
What's New
- Improved app performance by optimizing internal logging so less work
is done during normal use
- Fixed a connection reliability issue where session keep-alive
requests could be dropped
- General stability improvements
- Improved app performance by optimizing internal logging so less work
is done during normal use
- Fixed a connection reliability issue where session keep-alive
requests could be dropped
- General stability improvements
Security scan
TRUSTED
- Developer signature verified 2026-03-20
- Signature SHA1 18:D1:C4:F6:61:71:61:B5:CB:BF:91:8D:8C:75:74:AD:06:9F:B8:8C
- File MD5 98a03d2e3eb98a3104dfddf03dba5229
How to install Keiser M Series v4.5.1 on Android 7.0 Nougat+
Takes about 2 minutes. You'll need roughly 106.9 MB of free storage.
- Grab com.keiser.mseries.app_4050101.apk — hit the Download button above (106.9 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 98a03d2e3eb98a31…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.keiser.mseries.app_4050101.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=Unknown, OU=Development, O=Keiser Corporation, L=Fresno, ST=California, C=US. 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 Keiser M Series — tap Open on the install screen, or find the Keiser M Series icon in your app drawer (this build targets x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for Keiser M Series
- "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.
- Works on one phone but not another — this build ships x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.