Every Ruff includes 3 months of the Tether app, free3 months of the Tether app, freeJoin the waitlist

The Ruff.

A small device that clips to your dog's existing collar and reads six signals of pain. The Tether app shows you what it found, what is likely causing it, and what to do about it.

Join Waitlist How it works
The device

Six ways to catch pain you can't see.

One small device on your dog's existing collar reads six signals at once, around the clock, and everything it reads shows up in the Tether app.

Movement

Activity, rest, and how they settle.

Gait

A subtle limp before it is visible.

Vocalization

The sounds that signal pain, fear, or anxiety.

Vibration

Scratching, shaking, and tremor.

Temperature

Shifts that can track inflammation.

60GHz radar

Resting breathing and heart rhythm.

Drag to take it apart
Assembled
Exploded
Senses6
Water resistanceIPX7
ConnectivityWiFi and Bluetooth
BatteryUp to 15 days
Mounts onYour dog's existing collar
ChargingUSB-C
AppiOS
AssistantScout
Available inUS and Canada
MonitoringContinuous
Included3 months of the Tether app
Recommended forDogs 20 lbs and up
ShipsFirst units November 2026
Join the waitlist
Limited time

Start with 3 months free.

Every Ruff includes 3 months of the Tether app free. The app is where you see what The Ruff picks up, as a pain score, a reason, and a next step.

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The intelligence

Steps don't matter. Pain does.

The Ruff is not a fitness tracker. It gives your dog a pain score from 0 to 100, measured against his own normal rather than a breed average, and the Tether app tells you what the score means and what to do.

The Ruff, top view
9:41
TETHER
Pain Probability Index
31/100
Watch
Baseline 22, first move in 5 weeks
Insight

Pain climbs for about 2 hours after afternoon play, 4 of the last 7 days. Reads as exercise stress, not an injury.

Scout suggests

A quiet 20 minute window after play and a warm compress on his hips. Flag it if it holds above 35 for 2 days.

The Ruff
Senses.

Six signals read on your dog's existing collar, around the clock.

MovementGaitVocalizationVibrationTemperature60GHz radar
Tether
Explains.

His pain score, what is behind a change, and what to do about it.

Pain scoreThe reasonWhat to doHistory
Place it

The Ruff clips to the collar your dog already wears, and holds a charge for up to 15 days.

It reads

Six signals, read around the clock and sent to the Tether app over WiFi and Bluetooth.

You open Tether

See what changed, what is likely behind it, and the next thing worth doing.

9:41
TETHER
LiveBabsRUFF-0142
Pain Probability Index
22/100
Low
Baseline 24, 5 days below
What is driving it
Respiration
Autonomic
Gait
Thermal
Vocal
Gait
94%
Symmetry
HRV
86 ms
Resting 74
Respiration
22 bpm
Resting 19
Temperature
101.8
Baseline 101.4
Vocalization
Quiet
0 distress
Sleep
87
Quality
Insight
Evening pain spike
Pain climbs to the low 30s for about 2 hours after afternoon play. Open to see why, and what to do.
Home
Vitals
Scout
Timeline
Babs
9:41
Insights
Watch
Evening pain spike
What happened
Pain score rises to 28 to 32 in the 2 hours after her afternoon play window. Happens 4 of the last 7 days.
Pain score, last 7 days
Why it matters
Exercise-induced micro-stress in middle-aged hound mixes. Not baseline pain, not an injury. Her body is working harder to recover than it was a month ago.
What to do
Give her a quiet window
20 minutes of calm after play, before dinner.
Warm compress on her hips
10 minutes helps the recovery signal drop faster.
Flag it if it holds
If the spike stays above 35, or past 3 hours for 2 days, log it for the vet.
Home
Vitals
Scout
Timeline
Babs
9:41
Scout
Babs is doing well today. Pain is holding at 22, just below her baseline of 24.
Why does she seem stiff after the park?
Her pain climbs to the low 30s for about 2 hours after afternoon play, 4 of the last 7 days. That is exercise-induced micro-stress, not an injury. A short quiet window and a warm compress on her hips help her settle faster.
Should I be worried?
Not right now. I will flag it if the spike stays above 35 for 2 days in a row, or if it starts lasting longer than 3 hours.
Ask Scout anything
Home
Vitals
Scout
Timeline
Babs
Compared

Not a tracker. Here is the difference.

Activity trackers count what your dog did. The Ruff watches for pain and tells you what to do about it.

An activity trackerThe Ruff
What it measures
Steps, activity, and location.
Six signals tied to pain, movement, gait, sounds, vibration, temperature, and breathing.
What it tells you
How far he went and how long he slept.
Whether he is hurting, how likely it is, and what is probably behind it.
When it speaks up
A daily summary.
The moment his score moves off his own normal.
What you do next
Read a chart.
Follow a plain next step, and know when to call the vet.
The collar
Sometimes a collar of their own.
Your dog's existing collar, nothing else to buy.
At the vet
An activity log.
A summary of what changed and when, ready to hand over.
Waitlist

The Ruff, shipping from November. Join the waitlist.

$299

You pay $299 once for the device. The Tether app, where you see everything it picks up, is $8.99 a month or $82.88 a year, and your first 3 months are included.

First units ship in November 2026, in the order received, with 3 months of the app included. Joining the waitlist now holds your place in line. It connects over WiFi and Bluetooth.

Join Waitlist
Questions

Good to know.

The Ruff is a small device that clips to your dog's existing collar. It spots pain early, explains what is likely causing it, and tells you what to do, in plain language.

It reads six signals around the clock, movement, gait, sounds, vibration, temperature, and breathing, and compares them to your dog's own normal. When something moves off that normal, the app gives you a pain score, the likely reason, and a next step.

Yes. The first week is spent learning your dog's normal. After a month the score is tuned to him rather than to a breed average, and after six months you can see the long trend, which is where slow problems like arthritis first show. It starts from breed reference ranges on day one, so it is useful from the start and sharper with time.

No. Step counts and activity badges do not tell you when your dog is hurting. The Ruff is built around pain, not activity.

We recommend The Ruff for dogs 20 lbs and up. The fit on the collar and the readings are tuned for that size, so we do not suggest it for smaller dogs yet.

No. The Ruff clips onto the collar your dog already wears, so there is nothing else to buy.

$299 once for the device, plus the Tether app at $8.99 a month or $82.88 a year, with your first 3 months of the app included. The device senses and the app does the thinking, so you need both.

First units ship in November 2026, and units go out in the order people joined the waitlist, so joining now holds your place in line. Demand has outrun what we can build at once, so some units may ship a little later than that, and if the timing moves we will tell you first. It is an estimate rather than a promise.