tri screen-free health tracker: sleep, heart rate and recovery

An ordinary morning

You slept, but still feel tired.
See what happened overnight.

The bracelet records your night. The app compares it with your usual nights. The assistant explains the differences.

Your night

Example

6 h 12 min

1 h 18 min shorter than your usual night

00:4003:5007:00

Resting heart rate 58 bpmYour usual 52 bpm

Ask the assistant

In the app

Why don't I feel rested?

You usually sleep 7 h 30 min. Last night was 1 h 18 min shorter, and your resting heart rate was also higher than usual.

Remind me to go to bed at 23:00

Reminder on your bracelet · 23:00

More things to ask

Example screens and conversation with demo data

Put on the bracelet.
Data takes care of itself.

Put it on and forget it

Wear it day and night, in the shower and during workouts. Battery life lasts up to 15 days.

Tracks your body around the clock

Records heart rate, sleep and activity. Data stays on the bracelet even when your phone is far away.

Check your morning summary

Open your sleep, recovery and strain scores. Read today's insight or ask the assistant.

If you work out

How was your workout?
How am I doing today?

Open the record after your workout. The next morning, check sleep and recovery before choosing your next session.

After your workout

Running

45 minYesterday · 18:30 to 19:15

Heart rate

bpm

100140180

18:3018:5219:15

Min: 83
Avg: 135
Max: 174

Below zones2 min

Zone 18 min

Zone 28 min

Zone 314 min

Zone 412 min

Zone 51 min

Zones use a maximum heart rate of 190 bpm. Time is rounded to minutes.

The next morning

Daily summary

Take it easy today

Recovery is below your usual level. Consider how you feel when choosing your activity.

Open your nightDuration, stages and awakenings Check your recoveryNighttime heart rate and HRV

How we calculate scores ↗

Interface examples with demo data. Recovery is a calculated estimate.

More about workouts ↗

Ask about yourself. Get an answer.

An assistant lives in the app. It reads your bracelet data and answers in context, rather than giving generic advice. Ask it to set an alarm, and it will send it to your bracelet. Choose a sample conversation.

Sample conversations with demo data

Write or speak in Russian. The assistant responds using your data.

Explore the AI assistant ↗How food logging works ↗How the habit diary works ↗

From charts to decisions.

Sample insights for different days. Open a card to see the explanation. All data is for demonstration.

1 of 5

Already wear a watch?

Why choose our bracelet.

Charge less often, keep your wrist screen-free and discuss your measurements with a Russian-speaking assistant.

15

Up to 15 days without charging

Record sleep every night without charging your bracelet daily.

0

Screens on your wrist

The bracelet collects data. Open your measurements in the app when you need them.

Ask

Russian-speaking assistant

Explains your measurements and sets alarms and reminders on request.

Compare with

Feature	tri	Apple Watch Series 11	Garmin Forerunner 570, 42 mm
Between charges	Up to 15 days	Up to 24 hours	Up to 10 days
Screen on your wrist	No	Yes	Yes
Sleep	Sleep score and analysis	Sleep score	Sleep score
Before a workout	Recovery and daily insight	Measurements and strain	Workout readiness
Conversation and commands	Russian-speaking assistant using your data. Bracelet alarms and reminders	Siri: health data questions and watch commands*	Watch voice commands and phone assistant*

Comparison of specific models. Battery life depends on settings and use; device modes and features differ. Watch specifications: Apple ↗ and Garmin ↗.

* Assistant features depend on language, region and connected phone. Sources: Siri and health data ↗, Siri alarms ↗, Garmin assistant ↗.

Watches have advantages if you need a screen, navigation and controls during a run. Our format suits continuous tracking and clear explanations of your measurements.

Choosing between devices?

All comparisons: AI, memory and daily workflows ↗

Wear it all day. It stays out of your way.

No screen or notifications

tri bracelet clasp with steel symbol — Comfortable clasp

tri bracelet under running water — Water is no obstacle

What's inside.

Cutaway of the tri bracelet: optical sensor, board and battery inside the clasp

Sensors: Optical sensor, skin temperature sensor and accelerometer. They record measurements while you wear the bracelet.
Battery life: Up to 15 days per charge. No need to charge your bracelet every evening.
Memory: The bracelet stores up to 30 days of data. You can leave your phone at home for your whole holiday.
Protection: IP68 protection for showers, pools and rain. Not designed for diving or open water.

See the bracelet in action.
Recorded presentation, 33 minutes.

Having trouble? Watch on YouTube

Built on science.
Sources you can open.

Scientific research underpins our calculations. For each measurement, we explain what we calculate and which studies we use. Open the sources directly from the cards.

Sleep

We look at the duration, continuity and regularity of recorded sleep. The score helps you compare nights in your history.

One night: sleep stages over time

Sleep duration and regularity have been studied by Van Dongen and Windred. Open the original publications here.

Recovery

We compare nighttime HRV, resting heart rate and sleep with your baseline to estimate recovery.

Weekly HRV, ms. Dashed lines show your usual range

HRV foundations: measurement and interpretation standards, and a review of HRV metrics.

Strain

We calculate strain from heart rate and activity duration. Open a day in the app or review a whole period.

Daily strain scores for the week

We use sports-science approaches to heart-rate load and estimated maximum heart rate.

Energy

We estimate energy expenditure using your profile and activity. Calories in the app are calculated, not directly measured.

Estimated daily energy expenditure, kcal. Dashed line shows basal metabolism

The Mifflin–St Jeor equation for basal metabolism and Ainsworth's activity energy-expenditure compendium.

Charts use demo data. Publications describe the scientific foundations of the calculations. tri does not diagnose conditions and is not a medical device. Scores support decisions, but do not replace a doctor.

Your body, explained through science.

Sleep, heart rate and recovery in plain language, with links to research.

Diary 3 min Food logging in tri: photos, portions and your daily goal Add food with a photo, clarify ingredients and portions, and check daily calories and macros.

AI 2 min What to ask your AI assistant Use your own words to understand your night, log food, correct your diary or set an alarm.

AI 2 min What your AI assistant remembers Useful context, familiar foods and memory settings. What you can change or delete.

All articles

Our team's experience

How we use the bracelet ourselves.

Two observations from the founders: what we check in the app and what we change in our day.

Nikolay

Co-founder

Choosing activity based on how I feel

What I check: Morning recovery before a workout.
What I changed: When recovery is low, I don't push myself into a hard workout.
What I noticed: In my experience, I felt better by the evening.

Oleg

Co-founder

Keeping a consistent bedtime

What I check: My sleep score and bedtime.
What I changed: I moved bedtime half an hour earlier and try to keep it consistent every day.
What I noticed: In my history, sleep scores improved more than after trying to catch up at weekends.

Personal observations from the team. Other people's results may differ.

Membership

Everything included.
One annual payment.

₽33,000per year

Bracelet, app and assistant included. Annual payment upfront.

The bracelet stays with you even without renewal.

Renewal and bracelet upgrades

Renewal costs ₽33,000 per year. With an active subscription, new generations are included: we send the new bracelet and collect the old one.

After your subscription ends, saved data remains accessible. Renew to sync new data from the bracelet.

Join the waitlist Delivery and payment ↗

Bracelet included in your subscription

Your data

What the assistant
can access.

A useful answer needs context. Here is what goes into the conversation.

Data processing policy ↗

Measurements and your messages

The app stores bracelet data. To respond, the assistant uses messages, available measurements, profile information and saved conversation memory.

External AI services

Responses involve external AI services. Requests may include conversation text, photos you send and the data needed to answer.

Deletion and history requests

Delete your account in app settings. For history exports and data-processing questions, email hello@tribracelet.ru.

The essentials.

More questions? Message us on Telegram, and we'll reply personally.

How much does it cost?

One subscription costs ₽33,000 per year, paid upfront. The bracelet is included, with no separate device charge or extra payment for new generations.

Why do I need it if I already have a smartwatch?

Our screen-free bracelet lasts up to 15 days per charge. The app shows sleep, recovery and strain, while the assistant explains your measurements in Russian and sets alarms and reminders on the bracelet. Compare specific features with your watch: some watch models also offer workout readiness and sleep analysis.

What can the assistant do?

Ask in Russian by voice or text. It sees your data, remembers previous conversations, and sets alarms and reminders. Its answers use your measurements rather than generic advice.

Does my phone have to stay nearby?

No. The bracelet stores up to 30 days of data. Leave your phone at home and sync when you return.

How accurate is the data?

We help you understand your body's condition and make decisions, but we do not diagnose conditions or replace a doctor. Our calculations use methods from peer-reviewed research; we do not simply copy scores from the bracelet.

What happens when a new bracelet is released?

While your subscription is active, new generations are included: we send the new bracelet and collect the old one. There is no upgrade fee.

How much does renewal cost?

The same ₽33,000 per year. There are no hidden charges, and new bracelet generations remain included while your subscription is active.

What happens after the year ends?

The bracelet stays with you even if you do not renew. You do not have to return it. Your saved data remains accessible, but new bracelet data stops syncing. Renew your subscription to resume syncing. Renewal costs ₽33,000 per year; an active subscription includes new generations in exchange for your previous bracelet.

How long does the battery last?

Up to 15 days per charge, depending on use. The bracelet stores up to 30 days of data without a phone.

Can I wear it in water?

Yes. IP68 protection makes it suitable for showers and swimming pools. It is not designed for diving or open-water swimming.

Does it work in Russia?

Yes. Payment is in rubles, and the app and assistant support Russian. CDEK delivers across Russia and the EAEU.

When will my bracelet arrive?

We dispatch via CDEK after payment, to a pickup point or by courier. Delivery estimates for your city appear at checkout. We send a tracking number when your bracelet is handed to CDEK.

Next opening

On the 3rd

Every month, for one day.

33 000 ₽ / year

Bracelet included

Join the waitlist

We’ll send the link in Telegram on opening day.
Your phone number is optional. Unsubscribe anytime.