Questions about SAYA, Garmin & recovery — answered.

Yes. SAYA connects to your Garmin account and reads the sleep, heart rate, HRV, stress and activity data your watch already records — no extra wearable, no exports. If your Garmin tracks sleep and heart rate variability (most modern models do), SAYA can turn that data into recovery insights.

SAYA works with Garmin watches that record overnight heart rate variability (HRV) and sleep — including recent Forerunner, Fenix, Venu, Vivoactive, Vivosmart, Instinct and Epix models. Because SAYA reads data through your Garmin account rather than the device directly, any watch that syncs HRV and sleep to Garmin Connect will work.

Garmin Connect shows you what happened last night. SAYA shows you why — and what to change tonight. It links your evening habits (dinner timing, wind-down, workouts, alcohol) to your measured recovery, then computes personal correlations from your own nights. It's the evening coach that Body Battery doesn't try to be.

HRV (heart rate variability) is the tiny variation in time between your heartbeats. Higher, more stable overnight HRV signals that your nervous system is in recovery mode; a low or climbing curve means your body is still under load. SAYA reads your Garmin HRV to score how well tonight actually restored you — not just how long you slept.

SAYA doesn't put you to sleep — it shows you which of your habits help or hurt your recovery, measured on your own body. When you can see that late workouts cost you recovery points or that an earlier dinner deepens your sleep, changing them gets a lot easier. It's behaviour change backed by your real Garmin data.

Your chronotype is whether your body naturally runs early (a lark) or late (an owl). Instead of a quiz, SAYA measures your mid-sleep point across real nights — the MCTQ method used in chronobiology — and places you on a seven-type spectrum, so your bedtime, training and meals can follow your actual biology.

Yes. Your data is stored in Google Cloud in Frankfurt, Germany, under GDPR — the strictest privacy standard there is. SAYA never sells your data, shows no ads, and uses no tracking SDKs. You can disconnect Garmin or delete your account and all its data at any time. See our App Privacy Policy for the full detail.

SAYA is currently in private development and free for early-access users. Pricing for the full launch hasn't been finalised — the waitlist is where the first invitations and any launch details go out, in order.

In the last hour before sleep, your heart rate is a preview of the night ahead. A body that settles low and calm is primed for deep sleep; one still running hot pays for it in recovery. SAYA reads this evening resting heart rate automatically from your Garmin — no button to press — and tells you how ready you are before you even close your eyes.

SAYA is being built with a first group of Garmin athletes right now. It launches to the waitlist in order, with no fixed public date yet. Join the waitlist to get your invitation and occasional progress updates.