Coming soon to iPhone and Android
See what your eyes miss.
TrailGlow makes blood glow on your phone’s live camera, records your trail and points you back to the last blood, even with no signal.
7-day free trial, then a yearly or monthly subscription.

How it works
A glow you can follow.
Point your phone at the ground. TrailGlow looks for the color of blood in your live camera, makes it glow and dims everything else, so drops stand out against dirt, bark and leaves.
Sensitivity
Slide between strict and sensitive to suit the light and the ground.
Light when you need it
Turn on the flashlight from the camera screen.
A buzz on a match
Your phone vibrates when it spots one, so your eyes stay on the ground.
Tap to pin it
Tap anywhere on the screen to pin the spot with GPS and a photo.
Your glow color
Red, yellow or cyan: pick the one you see best.
It works by color, so red leaves and red clay can glow too. TrailGlow makes blood easier to see; you make the call.
Tracking
Never lose the last drop.
Every pin is saved with GPS. When the trail goes quiet, an arrow points you back to the last blood, even with no signal.
Pins with photos
Mark what you found: a photo, the blood (bright, dark or frothy) and a note.
Pause and resume
Pause tonight, resume at first light.
GPX export
Keep every track, and export any of them as a GPX file.
Offline
Works with no signal.
GPS needs no cell service, and neither does TrailGlow. The glow, your trail, pins and the arrow back to the last blood all work offline, and so do maps you’ve downloaded or already viewed.
Maps cover the United States at launch.
Privacy
The live camera feed stays on your phone.
No account needed
Your tracks, pins and photos are saved on your phone, and the whole app works without signing in.
Location for your trail
Location records the trails you start and points you back to the last blood.
Backup if you want it
Sign in with Apple or Google to back up your tracks.
Pricing
Try it free for 7 days.
Everything TrailGlow does, in one plan. Both plans start with 7 days free.
Yearly
$29.99
per year
7 days free
Monthly
$7.99
per month
7 days free
What you get
- Live blood detection
- A GPS trail that works offline
- Pins with photos, and a pointer back to the last blood
- Pause tonight, resume at first light
- Every track kept, with GPX export
After the free trial, the App Store or Google Play bills your plan, and it renews automatically until you cancel in your store’s subscriptions. To avoid the charge, cancel before the trial ends: on iPhone, at least 24 hours before.
Prices in US dollars.
Ready for the next trail.
TrailGlow for iPhone and Android. 7 days free.