Signal Spy* allows users to be better informed when it comes to their cellular service. It allows you to see signal strength and technology in real time. We can also tell you what LTE band you're using on Sprint and T-Mobile so you can understand what speeds and features to expect. Signal Spy also keeps a history of all of your connections: when you connect and disconnect from WiFi, and what carrier you're using! Pro Users can now see a history of Wi-Fi and Cellular connectivity along with signal strength and location!

For Project Fi customers, users will also be able to better manage their experience by easily swapping between carriers with our dialer code shortcuts. Our network switching logging will be extremely useful to show you how often you switch between Sprint and T-Mobile networks. We also have a resources page within the app dedicated to resources that Fi users have found helpful with their service. Note though that are app will not automatically switch for you, and that all switch requests will revert after 2 hours. This is a ramification of using the dialer codes and cannot be controlled by Signal Spy.

Have questions, bug reports, or feedback? Send an email to the developers from the about page!

Explanation of Permissions:
Location: In order to determine your LTE band, we need to access information about that tower. Accessing tower information requires the coarse location permission because of the data you can extract from that tower. We also use Location to determine where events took place (you can turn this off in settings)
Phone: In order to use the dialer, which is necessary for the carrier switch codes, we need to have the phone permission
Contact: In order to restore previous purchases on other devices, we need to verify your Google account and confirm add on payments. We don't store your contact information outside of your device

*Formerly called "Fi Spy"

Developers: Bryan Gintz and Ziggy Dziegman
Art Contributions: Andrew Carter and Brandon Pence

App Information Signal Spy

  • App Name
    Signal Spy
  • Package Name
  • Updated
  • File Size
    4.95 M
  • Requires Android
    5.1 (Lollipop MR1, API 22)
  • Version
  • Developer
  • Installs
    10,000 - 50,000
  • Price
  • Category
  • Developer
  • Google Play Link

Signal Spy Version History

Select Signal Spy Version :
  • 1.6.7 (91)
  • 1.6.3 (84)
  • Signal Spy 1.6.7 (91) APK File

    Publish Date: 2016-06-19
    Requires Android: 5.1 (Lollipop MR1, API 22)
    File Size: 5 MB (APK file)
    File APK Md5: 145c5420cd01d79bb4d2c4820bd104d4
    File APK Sha1: 899205a39b4ef0800b77ea36ff4cac6c4ccff53d
    APK Signature: b938338cc3a4778129219f9ec755caed5013e031
  • Signal Spy 1.6.3 (84) APK File

    Publish Date: 2016-04-05
    Requires Android: Android 5.1+ (Lollipop MR1, API 22)
    File Size: NAN (APK file)
    File APK Md5: d41d8cd98f00b204e9800998ecf8427e
    File APK Sha1: da39a3ee5e6b4b0d3255bfef95601890afd80709
    APK Signature: b938338cc3a4778129219f9ec755caed5013e031
    What's new :
    v1.6.3 - Released 4/4/16
    - New Pro Feature - Automated switching for both non-root and rooted users!!!!!
    - Use date format from device (i.e. 12 hr or 24 hour format)

    v1.5.7 - Released 3/25/16
    - Added ability for Backers to sign up for Backer Community
    - Misc Improvements and Bug Fixes
    - Pro Description

    v1.5.5 - Released 3/10/16
    - Added Pro Version
    - Added first Pro Feature - Detailed History
    - Improvements on network monitoring
    - GPS for detailed history
    - Misc Bug Fixes

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