NPI SDK v3.9.1.0
APK · 4.7 MB · version code 13 · Android 7.0+ · uploaded Jun 4, 2025
- Signature matches the Google Play version Details
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Compared with the latest version
The latest version is v3.11.0.0, uploaded Apr 8, 2026 — about 10 months after this one.
- Size: this file is 4.7 MB; the latest is 4.8 MB (46.2 KB larger).
- Both versions request the same permissions.
File information
- Version
- v3.9.1.0 (13)
- Uploaded
- Jun 4, 2025
- Size
- 4.7 MB
- Requires
- Android 7.0+ (API 24)
- CPU support
- Any (no native code)
- Screen
- Small screens and larger
- MD5
- d3c2978792a381e3fa991b8233eb84d2
- Signing certificate (SHA-1)
- 57:EC:73:B2:45:0E:56:DB:92:7E:1F:B2:07:70:BB:28:1D:BF:0B:A0
- Signed by
- CN=NPI, OU=Nippon Primex Inc., O=App group, L=Ohta, ST=Tokyo, C=JP
- File name
- npi-sdksample-13-70815333-d3c2978792a381e3fa991b8233eb84d2.apk
- Package
- npi.sdksample
- Downloads (all versions)
- 500+
- Age rating
- PEGI 3 · Everyone
What's new in v3.9.1.0
Fixed an issue where NScanPrinter could not be used because the callback was not set.
Permissions (7)
This version requests 7 permissions, 3 of them sensitive.
- Bluetooth advertise Sensitive android.permission.BLUETOOTH_ADVERTISE
- Bluetooth connect Sensitive android.permission.BLUETOOTH_CONNECT
- Bluetooth scan Sensitive android.permission.BLUETOOTH_SCAN
- Full network access android.permission.INTERNET
- Interact across users android.permission.INTERACT_ACROSS_USERS
- Interact across users full android.permission.INTERACT_ACROSS_USERS_FULL
- Internal broadcast protection (app-defined) npi.sdksample.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Security & authenticity
Security rating: Unknown
Signing certificate
- Signature matches the Google Play version Checked by the source store on Jun 4, 2025.
- Certificate issued to “App group” This is the certificate of the Google Play version.
- Same certificate as the 2 other versions checked
Store checks
- Developer signature not checked yet Jun 4, 2025
- Validated against Google Play Jun 4, 2025
- 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 (2 other versions compared). AAPKs doesn't scan files itself.
How to install NPI SDK on Android 7.0+
You'll need about 9.5 MB of free space.
- Download the APK — tap Download APK above (4.7 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 npi-sdksample-13-70815333-d3c2978792a381e3fa991b8233eb84d2.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 d3c2978792a381e3fa991b8233eb84d2. 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?”. This file has no malware rating from the source store. If Play Protect warns about it, tap Cancel. 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 NPI SDK — 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 7.0+). Download it again, or pick an older version.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.