Understand your state. Choose your next step.
A 60-second fingertip reading, a clear breakdown of what it shows, and an AI guide that turns it into one practical step for today.
- Pulse-wave method documented in US patent 5,381,797 (1995)
- 500+ devices sold
- Real app, real sensor
What you get
- Know where you stand. One reading gives a Qi Score, pulse, SpO₂ and a Five Elements map. No guessing.
- One step, not a lecture. Maria, the AI guide, suggests a single manageable action for today: breathing, food timing, rest.
- See what actually works. Your journal shows the trend. Compare it with sleep, workload and the context you add to your readings.
Maria turns a reading into one step.
AI helps put your readings in the context of daily life: routine, rest and food choices. Start with one manageable change and watch your trend.
1Reading
Qi Score 75 · Fire −4.5 · Water −4.6. The breakdown shows what to pay attention to.
2Action
“One step today: 3–5 minutes of calm breathing. Then compare the next reading under your usual conditions.”
3Trend
Compare readings over several days. Look for recurring patterns and ask Maria about a reading, instead of judging by one day.
Illustrative example of guidance, not a user outcome or a promise of improvement.
Sensor on a finger. 30–60 seconds.
Sit comfortably, start recording in the app and place the sensor on a finger.
Spectral analysis
The optical PPG sensor records your pulse wave. Spectral analysis extracts 36+ parameters.
Five Elements and Balance
The result is shown through Wood, Fire, Earth, Metal and Water, plus the overall Balance index.
- Wood
- Fire
- Earth
- Metal
- Water
- Balance
A clear interpretation
Maria explains the result and suggests a next step for routine, recovery and habits.
Dashboard for today. Journal for the trend.
Your dashboard shows the current reading. Your journal shows the trend over the period you choose.
Ask AI — ask about a specific reading and your history.
Actual app screens · English interface
Add context. Change one thing. Compare.
Food, movement and recovery become easier to understand when you observe yourself.
Morning
A short reading in familiar conditions. Understand your state and choose one step.
Daytime
Food, movement or a practice: one manageable change.
Evening
Look back at the day. Your history gives context to the next reading.
Food · Movement · Breathing · Yoga · Meditation · Rest
You add the context. The sensor measures your pulse.
One pulse wave. Six values.
A pulse wave unfolds into a Five Elements map and Balance. A visual language makes complex readings easier to interpret.
Pulse-wave method documented in US patent 5,381,797 (1995). Read the patent ↗
Send a reading. Talk it through.
Share a reading from the app when you want to talk it through with someone close to you. You choose what to share and with whom.
Sensor + 12 months of access
US$199
- Compatible fingertip pulse sensor
- 12 months of Qi Tracker access: readings, history, Five Elements breakdown
- Maria, your AI guide, and Ask AI on your readings
- Share a reading with the people who matter
- Send a request using the form below.
- We confirm delivery to your country, the total and the start date of your 12 months.
- You pay, and the sensor ships.
Sensor defect guarantee: if your sensor arrives faulty, we replace it.
Request received.
We’ll contact you to confirm the price and delivery.
We couldn’t confirm receipt of your request.
Please try again or email us.
Or email info@let-labs.com
No payment on this page. You pay only after we have confirmed delivery and the total — and before the sensor ships.
Already have a compatible sensor? Install the app and choose an access period.
Have a sensor? Start today.
- Install the app and turn on Bluetooth.
- Tap the heart button, then switch the sensor on.
- Sit comfortably, relax your hands and wait for the completion sound.
Choose your access period.
- 1 week — US$4.99Explore readings and their interpretation. Choose →
- 1 month — US$14.99Observe your habits on a regular basis. Choose →
- 3 months — US$39.99Watch your trends over a longer period. Choose →
Access activates after payment for the account with the specified email. Subscriptions are purchased in the app via Google Play, in USD. My account ↗
Questions, answered.
Which sensor do I need?
The compatible fingertip pulse sensor from the kit. Have a different fingertip oximeter? Write to us and we will check compatibility: analysis needs a raw pulse wave, and not every model provides it.
How often should I measure?
Regularly, preferably at the same time and in similar conditions. This makes your history comparable and patterns easier to spot.
Does the app track what I ate or did?
The sensor records a pulse wave. You add the context — food, movement, breathing, rest — in the app and compare it with your readings.
What are Five Elements and Balance?
Qi Tracker’s interpretation model: five directions plus an overall Balance index. A visual language for reading the pulse wave, not a measurement of organs.
Is this a medical device?
No. Qi LifeTracker is a wellness product for observing your state and habits. It does not diagnose, treat or prevent disease. Consult a healthcare professional about medical concerns.
What happens after the year?
You can renew access from your account. Sending a kit request does not create an order or charge you; we confirm everything by email first.
Another question? Write to info@let-labs.com.