How it works
Two people, two Apple Watches, one shared session. Tontik looks at how your rhythms move together, not at either of you alone.
Pair up
Each person wears an Apple Watch and signs in to Tontik. You connect with the one person you want to measure with.
Start a session together
Measurement begins only when you start a session, and you can stop it at any time. Heart rate is read only while the session runs.
See your sync
Tontik correlates the two heart-rate streams for tempo, rhythm similarity and timing, then shows a sync score and charts of where you were in step.
Made for things you do together
Whenever two people share an activity, their bodies respond to each other. Tontik shows how closely.
Team and partner sports
Doubles tennis, rowing, running partners or dance. See whether you push and recover at the same moments, and how your teamwork improves over time.
Sleeping side by side
Do you two really rest well together? Compare how your heart rhythms settle through the night and find out whether sharing a bed works for both of you.
Any moment you share
Walks, yoga, a workout or simply time spent together as a couple. If you do it together, Tontik can show how in tune you were.
Private by design
Tontik measures the connection between two people, so it is built to share as little as possible.
- Only during a session. Heart rate is read through Apple HealthKit only while a session you started is running. Tontik does not read your health history and does not write to HealthKit.
- Results, not raw data. Your raw heart-rate values are never shown to the other person. You both see the sync result.
- Not a dating or social app. There is no partner matching, profile browsing or messaging. You measure with someone you already know.
- Not a medical device. Tontik is for insight and fun. It does not diagnose, treat or monitor any health condition.