Tailmates is the social health app for you and your dog.

Walk with friends at the park or join a live walk from anywhere. Every walk adds to your dog's health picture, and your vet stays in the loop.

Free on iPhone and Android.

Tailmates in one minute.

A one-minute film about Tailmates, the social health app for you and your dog. A woman and Maple, her golden retriever, start a walk from the app on her phone. The app times the walk and maps their route as they walk beside a creek at sunrise. She takes the walk style quiz, and the app's guess comes back: Maple is a Commuter. She joins a friend's walk from Live now and hosts her own Sunday pack walk, waving her friends and their dogs along a park path. A friend's cheer lands on her walk, its banner lifts off the phone and the app's confetti falls all around, and on the lawn Maple gives her a high five. She shares Maple's progress in the feed, and we see her pack, a walking group and a moment in Tailmates Town, and Maple plays with a friend's dog on the grass. Maple's photo becomes her longevity score, and that evening Maple sleeps with her head on her lap. She invites her vet, Maple meets the vet at the clinic, the bloodwork comes back lab verified, and Maple's health passport reaches her vet. Maple walks beside a friend's dog, her score card comes up, the pack walks into the sun, and the film ends on Walk more. Know more. Together.

Everything starts with a walk.

Walk more.

  • Join a walk.Walk beside friends at the park, or join a live walk from your own street, in any city.
  • Host a walk.Lead walks at your park or live from anywhere, with a free group of your own.
  • Find your dog's walk style.Five questions about an ordinary walk, and your dog lands on one of five walk styles.

Know more.

  • Check your longevity score.It unlocks free at Level 10, and your walks keep it moving. An estimate, never a diagnosis.
  • Connect with your veterinarian.Share your dog's health passport with your clinic. You choose what they see and for how long, and your vet stays in the loop.

Together.

  • Share your progress.Every finished walk lands on your timeline, and with your pack when you choose.
  • Cheer each other on.Send a cheer on a friend's walk, and it lands on their screen in a burst of confetti.
  • Find your pack.Add the friends you walk with, nearby or across the country.
  • Join groups.Groups for your park, your breed, your rescue or your vet, with meetups on the calendar.

Our mission

Radically extend canine lifespan.

Dogs get about a decade. We're building the science that gives them more.

Nobody solves it alone. It takes three things.

  • Research.

    Aging science is moving fast. Rapamycin trials. Longevity drugs arriving in real clinics. We follow the evidence, we track what dogs are actually taking, and we publish what we learn. All of it.

    Naming a drug describes the field. The recommendation belongs to your veterinarian. Tailmates informs; it never prescribes or sells treatment.

  • Tracking.

    A longevity score you can move. Walks, weight, body condition, bloodwork. The picture builds while you go about your day.

  • Participation.

    Share your dog's data and it joins every other dog's. That is how a decade of anecdotes becomes evidence. It is your call, always, and the app works the same either way.

The company carries the mission. The app delivers today: a score, a tracker, and a record. Life extension is the work, never a claim the app makes about your dog.

Thanks for joining our mission.

Start with the dog.

One scientist, one dog, an obsession for more time.

Tailmates started with a founder, a dachshund, and the oldest question every dog owner asks: how do I keep her around longer? That question is the whole company.

Hi, I’m Thom.

Thanks for joining.

I started this journey by getting a biotechnology degree out of my interest in longevity in 2021. Then I looked at my dog Tesla and did the math on how much time I had left with her.

In 2023 I started Naturally Royal, a canine longevity supplement company, because of Tesla. Now I want to dive deeper into radically extending canine lifespan by building the largest collective research project in the world.

That’s Tailmates. The walks, packs, and games are the fun. The data they build across every dog that joins is how we answer the question for all of our dogs: the food our dogs eat, the medications they’re on, the activities and habits they have, tracked as new interventions come into the world.

Meet Tesla.

Tesla is a dapple dachshund, and she is the reason for all of it. The degree, the supplements, the research, the app you are looking at. Every piece traces back to wanting more years with her.

She is the first packmate in Tailmates, because she is the dog the first version was built for. Every dog that joins after her is joining something that started as one person not ready to run out of time with his dog.

Both papers behind the score are public.

We write the method down and publish it first, so a finding can never be reverse engineered into a story afterwards. That work lives on Frontier Science, the founder’s open-science journal. Both Tailmates papers are posted there as editorial previews. They are early drafts, not peer reviewed yet, and we update the model they describe as real data comes in.

  • Design and computational verification of a transparent canine health-and-longevity composite

    A methods paper that freezes exactly how the score is computed, where every number comes from, and what it does not yet claim. Editorial preview, pre-validation.

    Read the preview
  • Prospective validation of a dynamic multimodal canine health and longevity model

    The protocol for testing the model against real outcomes, written before any data is gathered, so the way we will judge it is fixed in advance. Editorial preview, pre-validation.

    Read the preview

Research, hosts and vets.

  • Research, only if you opt in.

    Every walk you log can count for canine longevity research. It’s off unless you turn it on. In Settings, Pause contribution keeps your choices, and Withdraw turns everything off.

    How the research works
  • Host a walk.

    Lead walks at your park or live from anywhere, and give your people a home on Tailmates. For vets, rescues, creators and clubs.

    Host a walk
  • For vets.

    Join our mission. Tailmates gets dogs walking every day, and clinicians lead the care.

    How vets partner with us

The social health app for you and your dog.

Download on the App StoreGet it on Google Play

Free on iPhone and Android.

Free on iPhone and Android.