Sleep
Your night, stage by stage.
Deep sleep1h 52m
Light sleep4h 58m
Awake0h 51m
Screenless fitness tracker
PRACTS ZERO
£99.99£199.99−50%
Incl. VAT · free UK delivery
Colour: Black
Try it for 30 days. Money back if it's not for you.
Free UK delivery · 4–10 working days
No subscription
£0
a month.
Forever.
Forever.
A leading screenless tracker charges a membership: from £507 over three years.² ZERO you buy once. Then you pay nothing more.
On video
What ZERO looks like.
- No screenNothing lights up, nothing distracts.
- 25 gYou barely feel it, even at night.
- Up to 15 daysStandby¹, magnetic charging.
- Woven strapNylon, elastic.
Your data
You train.
ZERO tracks.
HRV
Your HRV, every morning.
Heart rate
Your heart rate. Mid-sprint or asleep.
142bpm
Training
Start a workout. See your stats.
Duration32 min
Avg. HR128 bpm
Calories310 kcal
No screen
Nothing lights up. Nothing distracts.
0displays
£0a month
Example values from the HealthWear app · Not a medical device
The app
Eight values.
One free app.
ZERO tracks quietly in the background. Each morning you see it all in the free HealthWear app.
Real screenshots of the free HealthWear app. Example values.
- Heart rateday and night, even while you sleep
- Sleep stageslight, deep, awake
- HRVthe variation between two heartbeats
- SpO2*an estimate of blood oxygen
- Skin temperature*trend at the wrist
- Steps & caloriesplus distance and sport modes
- Routesvia your smartphone's GPS
- Vibrationa gentle buzz for messages
How it works
Three steps.
-
01Put it onBand on your wrist, next to your watch if you like. 25 g, you'll barely feel it.
-
02ConnectDownload the free HealthWear app and pair the band via Bluetooth. iOS 15 and Android 5.0 or later.
-
03Check inEvery morning you see your sleep, heart rate and HRV in the app. No subscription, ever.
Questions
Good to know.
Is the app really free?
Yes. HealthWear is free on the App Store and Google Play. There are no monthly fees for the band or the app.
How accurate are the values?
ZERO measures with an optical sensor on the underside. The values are wellness values for your everyday life and training, not clinical measurements. ZERO is not a medical device and does not replace a visit to your doctor.
Do I need a subscription?
No. You pay once and use the band and the app with no monthly fees. No membership, no minimum term, nothing to cancel.
How long does the battery last?
According to the manufacturer, up to 15 days on standby (125 mAh). In everyday use it depends on which measurements you use and how often you sync. You charge it with the included magnetic cable.
Can I shower or swim with it?
ZERO is splash-resistant: rain and hand-washing are no problem. It is not suitable for swimming. Please take it off for showering, bathing and the sauna.
Does it work with iPhone and Android?
Yes, with Android 5.0 and iOS 15 or later. You connect the band via Bluetooth to the free HealthWear app, available on the App Store and Google Play.
How does delivery work?
Delivery is free and takes 4 to 10 working days. Once your parcel is on its way, you'll receive an email with your tracking number.
Can I return it?
Yes. PRACTS ZERO comes with our 30-day money-back guarantee: if it's not for you, email us at info@practs.de within 30 days of receiving it. We'll send you the return address and refund the purchase price once the band is back with us, complete with its charging cable. Return postage is at your cost, unless the item is damaged, faulty or not what you ordered.
This guarantee from PRACTS (info@practs.de) is in addition to your 14-day right to cancel and your statutory rights, which are not affected.
Technical specs
- Display
- None
- Measurements
- Heart rate, HRV, sleep, SpO2*, skin temperature trend*, steps, calories, distance
- GPS
- Via your smartphone
- Notifications
- By vibration¹
- Case
- Metal frame, plastic (PC)
- Strap
- Nylon, woven, elastic
- Weight
- 25 g
- Dimensions
- 40.5 × 25 × 9 mm
- Strap length
- 200 mm
- Battery
- 125 mAh, up to 15 days standby¹
- Charging
- Magnetic charging cable
- Connectivity
- Bluetooth
- App
- HealthWear, free (iOS, Android)
- Compatible with
- Android 5.0 and iOS 15 or later
- Water resistance
- Splash-resistant, not for swimming
- Colours
- Black, grey, navy
- In the box
- Band, magnetic charging cable, quick start guide
Buy once.
Use forever.
PRACTS ZERO · £99.99 · incl. VAT
Colour: Black
Black with an anthracite case; grey and navy with a silver case.
Try it for 30 days. Money back if it's not for you.
Free UK delivery · 4–10 working days
Over 75,000 orders in the PRACTS shop since 2021³
Notes
* Wellness value. Not a medical device. The values are for general well-being, not for diagnosis or treatment.
¹ Manufacturer's figure. Actual battery life depends on use and settings.
² Membership prices of a leading screenless fitness tracker, UK website, checked 20 Oct 2026: from £169 to £349 a year. Over three years: 3 × £169 = £507. Other providers have other prices and terms.
³ Orders in the PRACTS online shop from 2021 to October 2026, all products and countries.
Some people in the images were created with AI. The band shown is the product you receive.