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Trail Sense

Use your phone's sensors to assist with wilderness treks
New in version 7.7.0
Navigation
- Redesign compass dial
- Option to show nearby beacons

Climate
- Estimate insect activity

Map
- Trace mode
- Option to increase location indicator size

Beacons
- Add more icons

Ruler
- Option to reverse direction
- Highlight measurement

Astronomy
- Tap chart to change time

Magnifier
- New tool

Augmented Reality
- Option to show low brightness stars/planets

Sensors
- Quick action to recalibrate altimeter

Packing Lists
- Mark items as optional
- Pound + ounces weight entry
Explore beyond the reaches of the Internet with Trail Sense.


  • Designed for hiking, backpacking, camping, and geocaching

  • Place beacons and navigate to them

  • Use as a compass (only available on devices with a compass sensor)

  • Follow paths

  • Retrace your steps with backtrack

  • Use a photo as a map

  • Plan what to pack

  • Be alerted before the sun sets

  • Predict the weather (only available on devices with a barometer sensor)

  • Use your phone as a flashlight

  • And much more!



Trail Sense is a tool, and just like any other tool that you bring into the wilderness,
it's essential to have backup equipment and skills.
This app is intended for information purposes only and the accuracy of the predictions and sensors are determined by a number of factors, including calibration, sensor quality, external sources, etc.
Use at your own risk, always have backup tools (ex. compass), and stay safe.

This app also does not, and will never, use the Internet - all information in Trail Sense comes directly from your phone's sensors, and no data will leave Trail Sense.

COMMON ISSUES

  • No compass: If your phone does not have a compass sensor, there is nothing I can do to make it work because that is hardware.
    You will still be able to use other features of Trail Sense.

  • No weather: The Weather tool is only available if your phone has a barometer sensor.



Found an issue or want a new feature? Contact me at trailsense@protonmail.com or create a new issue on GitHub: github.com/kylecorry31/Trail-Sense

I'm the only developer of Trail Sense, so I will do my best to help out with issues - but I have a limited device selection to test on.


PERMISSIONS

  • Notifications: Allows Trail Sense to display notifications (backtrack, weather, sunset alerts, astronomy events, water boil timer, etc)

  • Location: Allows Trail Sense to retrieve your location for navigation, weather (sea level calibration), and astronomy.

  • Background location: Allows Trail Sense to retrieve your location for sunset alerts while in the background.
    On some devices, this will also improve the reliability of backtrack and weather monitor.

  • Physical activity: Allows Trail Sense to use your phone's pedometer for distance calculation.

  • Camera: Allows Trail Sense to use your camera on the sighting compass, clinometer, and for taking photos used by the Cloud Scanner, QR Code Scanner, and Photo Maps.

  • Alarms & reminders: Allows Trail Sense to post a notification at an exact time.
    This is used by the Clock tool (when updating system time) and Sunset and Sunrise Alerts.



Links

  • Privacy policy: https://kylecorry.com/Trail-Sense/#privacy

  • FAQ: https://github.com/kylecorry31/Trail-Sense#faq

  • Trail Sense is available under the MIT License: https://opensource.org/license/mit/


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Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 7.7.0 (142) suggested Added on Apr 07, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions

    Download APK 12 MiB PGP Signature | Build Log

    • New in version 7.6.1
    Map layers
    - New layers: slope, aspect, ruggedness index, sightings (field guide), night, and solar/lunar eclipse
    - Layer management (add, remove, reorder)
    - Hillshade multi-direction shading option
    - Tide phase display option
    - Fling gesture support
    - Improve performance
    - Tap beacon for details rather than navigating

    Map
    - Adjust the display time for time-dependent layers

    Misc
    - Improve error handling
  • Version 7.6.1 (141) - Added on Feb 22, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions

    Download APK 11 MiB PGP Signature | Build Log

    • New in version 7.6.0
    Map layers
    - New layers: slope, aspect, ruggedness index, sightings (field guide), night, and solar/lunar eclipse
    - Layer management (add, remove, reorder)
    - Hillshade multi-direction shading option
    - Tide phase display option
    - Fling gesture support
    - Improve performance
    - Tap beacon for details rather than navigating

    Map
    - Adjust the display time for time-dependent layers

    Misc
    - Improve error handling
  • Version 7.6.0 (140) - Added on Feb 19, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions

    Download APK 11 MiB PGP Signature | Build Log

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