
CrowdMag
Use compass, get magnetic variation, record mag data and be a citizen scientist!
NOAA's National Geophysical Data Center · gov.noaa.ngdc.wmm2
- Signature matches the Google Play version Details
At a glance
- Latest version
- v2.3.0 (173)
- Updated
- Aug 14, 2026 (2 months ago)
- APK size
- 11.5 MB
- Requires
- Android 5.0+ (API 21)
- CPU support
- Any (no native code)
- Graphics
- OpenGL ES 2.0+
- Category
- Tools (app)
- Listed since
- Apr 22, 2021 (at least)
- Permissions
- 12 (6 sensitive)
- Developer contact
- [email protected]
- Privacy
- Developer's privacy policy
About this APK
CrowdMag is an app by NOAA's National Geophysical Data Center in the Tools category, listed since at least April 2021. It has no native code, so it runs on any Android processor.
It asks for 12 permissions, 6 of them sensitive, including precise location, location in the background and approximate location. It asks for the same permissions as version 2.2.6.
What's new in v2.3.0
Description
From the listing uploaded by “appupdater”.
Version history
3 versions are listed, going back to v2.2.4.
Security & authenticity
Signing certificate
- Signature matches the Google Play version Checked by the source store on Aug 14, 2026.
- Certificate issued to “Nir Boneh” This is the certificate of the Google Play version.
- Same certificate as the 2 other versions checked
Store checks and file details
- Developer signature verified Aug 14, 2026
- Validated against Google Play Aug 14, 2026
- Signed byCN=Nir Boneh
- Signing certificate (SHA-1)42:E1:34:33:3D:3F:DB:8F:9C:19:5F:5B:0E:2C:B6:99:70:D0:9F:B6
- File MD5a9e372f80a099604fd5692e02f176f9a
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans and ratings 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 — compare the MD5 and signer after downloading.
Permissions (12)
CrowdMag requests 12 permissions, 6 of them sensitive.
- Approximate location Sensitive android.permission.ACCESS_COARSE_LOCATION
- Location in the background Sensitive android.permission.ACCESS_BACKGROUND_LOCATION
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Precise location Sensitive android.permission.ACCESS_FINE_LOCATION
- Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
- Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
- Full network access android.permission.INTERNET
- Internal broadcast protection (app-defined) gov.noaa.ngdc.wmm2.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- Read Google service settings com.google.android.providers.gsf.permission.READ_GSERVICES
- Schedule exact alarms android.permission.SCHEDULE_EXACT_ALARM
- Show notifications android.permission.POST_NOTIFICATIONS
- View network connections android.permission.ACCESS_NETWORK_STATE
Required hardware & features
- Basic touch input android.hardware.faketouch
- Location android.hardware.location
- GPS android.hardware.location.gps
- Network location android.hardware.location.network
- Portrait screen android.hardware.screen.portrait
CrowdMag APK: questions and answers
Can I install this APK over the version I already have?
Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.
Is the CrowdMag APK safe?
No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is a9e372f80a099604fd5692e02f176f9a.