SIMATIC WinCC OA UI v3.21.3
APK · 58.5 MB · version code 321003001 · Android 8.0+ · uploaded May 29, 2026
- Signature matches the Google Play version Details
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v3.21.5, uploaded Aug 21, 2026 — about 3 months after this one.
- Size: this file is 58.5 MB; the latest is 58.8 MB (264 KB larger).
- Both versions request the same permissions.
File information
- Version
- v3.21.3 (321003001)
- Uploaded
- May 29, 2026
- Size
- 58.5 MB
- Requires
- Android 8.0+ (API 26)
- CPU support
- ARM 64-bit
- Screen
- Small screens and larger
- MD5
- 8164c324212fde36a01e1831c34d1e61
- Signing certificate (SHA-1)
- EA:BC:C1:10:6E:A9:72:8A:FC:E0:26:23:5C:EC:DE:DA:D7:B4:33:10
- Signed by
- CN=ETM, O=ETM professional control, L=Eisenstadt, C=AT, OU=WinCC_OA
- File name
- com-siemens-winccoaui-321003001-74959298-8164c324212fde36a01e1831c34d1e61.apk
- Package
- com.siemens.winccoaui
- Downloads (all versions)
- 10K+
- Age rating
- PEGI 3 · Everyone
What's new in v3.21.3
Updated to latest WinCC OA version 3.21
Enhanced compatibility with the latest WinCC OA features
The version and build date information is missing in the startup logs of the Mobile UI on Android.
Permissions (14)
This version requests 14 permissions, 5 of them sensitive.
- Approximate location Sensitive android.permission.ACCESS_COARSE_LOCATION
- Bluetooth connect Sensitive android.permission.BLUETOOTH_CONNECT
- Bluetooth scan Sensitive android.permission.BLUETOOTH_SCAN
- Camera Sensitive android.permission.CAMERA
- Precise location Sensitive android.permission.ACCESS_FINE_LOCATION
- Bluetooth android.permission.BLUETOOTH
- Bluetooth admin android.permission.BLUETOOTH_ADMIN
- Control vibration android.permission.VIBRATE
- Full network access android.permission.INTERNET
- Nfc android.permission.NFC
- Push messaging (app-defined) com.siemens.winccoaui.permission.C2D_MESSAGE
- Receive push notifications com.google.android.c2dm.permission.RECEIVE
- Show notifications android.permission.POST_NOTIFICATIONS
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Signature matches the Google Play version Checked by the source store on May 29, 2026.
- Certificate issued to “ETM professional control” This is the certificate of the Google Play version.
- Same certificate as the 4 other versions checked
Store checks
- Developer signature verified May 29, 2026
- Validated against Google Play May 29, 2026
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (4 other versions compared). AAPKs doesn't scan files itself.
How to install SIMATIC WinCC OA UI on Android 8.0+
You'll need about 117 MB of free space.
- Download the APK — tap Download APK above (58.5 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap com-siemens-winccoaui-321003001-74959298-8164c324212fde36a01e1831c34d1e61.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be 8164c324212fde36a01e1831c34d1e61. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open SIMATIC WinCC OA UI — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 8.0+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for ARM 64-bit only. Devices with other processors can't install it.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.