🇪🇺 Made in Europe
Body Battery
Example day · 23:00
23/ 100
21:00 Two drinks −24 overnight
Your Body Battery says 23. Here is why.See what tonight costs your Body Battery.
Your Garmin watch measures Body Battery, its energy score from 0 to 100, all day. Drayn reads it from Garmin Connect with your permission, lays it next to your calendar and shows what moved it.
Your Garmin watch measures Body Battery, its energy score from 0 to 100. Before the evening starts, Drayn shows what an evening like this usually takes from tomorrow morning, read from your own past evenings.
An app for iPhone and Android, in development. The list gets the first invites.
Insights derived in part from Garmin device-sourced data.
Which habits move your Body Battery.
Drayn lays your calendar, your evenings and your workouts next to what your watch measured the next morning, from your own Garmin data. Point at a dot to read it.
| Example data | Body Battery next morningusual 74 | Sleepusual 7 h 12 | Resting heart rateusual 52 | Stress next dayusual 31 | All four |
|---|---|---|---|---|---|
| From your calendar | |||||
| More than 3 meetings | |||||
| Meeting after 18:00 | |||||
| Back-to-back from 9 to 12 | |||||
| A flight | |||||
| From your evening | |||||
| Two drinks in the evening | |||||
| Late meal, after 21:00 | |||||
| Screen in bed | |||||
| From your watch | |||||
| A run | |||||
| Late to bed, after 00:30 | |||||
Two drinks in the evening → Body Battery next morning −14 on average, seen on 9 of 12 evenings. Example.
The three habits that move it most, ranked.
- −14
Two drinks in the evening.Body Battery the next morning, on 9 of 12 evenings.
- −11
Late to bed, after 00:30.And 48 minutes less sleep, on 13 of 14 nights.
- +6
A run.Body Battery the next morning, on 9 of 11 days.
Patterns in one person's own data, never a diagnosis. Example data. A flight costs more than a late night, but four flights are too few to rank.
From your wrist to a reason, in four stops.
Nothing to type. Drayn lays two things you already have side by side: what your watch measured and what was in your calendar.
Your Garmin watch
Measures Body Battery every few minutes, day and night, along with sleep, stress, resting heart rate and workouts.
- 07:00 82
- 12:00 62
- 23:00 23
Body Battery, one example day.
Garmin Connect, the app your watch syncs to
You allow Drayn to read it, one kind of data at a time. Drayn never writes anything back.
Your calendar, on your phone
You pick which calendars count. Drayn reads when each event starts and ends.
- Tue 3 Nov08:30Stand-up·10:00Hiring panel·13:00Pricing review
- Wed 4 Nov11:00Planning·11:30Client call
Titles stay on your phone. Example calendar.
The reasons, each morning
Your Body Battery and the three things that moved it most, in plain sentences.

The app in development, on example data. Insights derived in part from Garmin device-sourced data.
Pick an evening, see tomorrow.
Before the evening starts, Drayn shows what an evening like this usually takes from tomorrow's Body Battery, read from your own past evenings. You decide. Drayn only shows the cost.
77
Body Battery tomorrow at 07:00, about your usual. Example.
Tomorrow starts with a 09:30 pitch.
Built in Europe, under the GDPR. Drayn never sends your health data outside the EU.
What stays on your phone.
- Your calendar titles.You pick which calendars Drayn reads. Private is off unless you switch it on.
- Nothing goes back to Garmin.Drayn reads your watch's data with your permission, for each kind of data. It never writes to Garmin Connect.
- Delete it in one place.Disconnect in Settings at any time, and your data is deleted with it. Drayn shows no ads, runs no trackers and sells no data.
The full text: privacy policy.

Questions, answered plainly.
Anything else: hello@drayn.eu.
What is Body Battery?
Garmin's energy score from 0 to 100. Your watch works it out from your heart rate, stress, sleep and activity. Drayn does not change it. It reads it and looks for what moved it.
Do I need a new watch?
No. Drayn reads the Garmin watch you already wear, through Garmin Connect. It needs a watch that records Body Battery.
Is this a medical app?
No. Drayn shows how your day and your Body Battery moved together. It does not diagnose, treat or advise on any condition.
Who sees my calendar?
You. Event titles stay on your phone, and you choose which calendars Drayn may read.
What does it cost?
Nothing while we test. Before anything costs money, we will say so, and you decide.
When can I start?
Drayn is in development. The waitlist gets the first invites, in the order people joined.
Sleep on it. Wake up to the reason.
Join the list and we invite you when the first version is ready.
We keep your email, the date and which version of this page you saw. Nothing else. You can withdraw any time; details in the privacy policy.
Insights derived in part from Garmin device-sourced data.