Whoop 4.0 overview: The wearable that is all about restoration


We have come a good distance within the wearables world, from easy bands that monitor your steps via to fully-fledged smartwatches that can do completely all the things. Monitoring biometrics has lengthy been an choice, from the earliest Fitbit Flex via newest Apple Watch. Realising that some units are simply making an attempt to do an excessive amount of, Whoop presents an answer that, in execution, is extra like the previous, however in knowledge, extra just like the latter.


We have been sporting the Whoop 4.0 to see what it is all about.

Whoop pricing and subscriptions

The Whoop band is free whenever you take out a membership to Whoop – so it is not likely free. The value is $239 (£229) a yr, so you possibly can see that as a fairly excessive price in comparison with the one-off worth for a Garmin or certainly an Apple Watch. Nonetheless, the likes of Fitbit offers enhanced sleep knowledge with a subscription to Fitbit Premium for $79.99 (£79.99) a yr, so Whoop is not alone in taking a look at a subscription mannequin, however it’s not low cost.

Whoop 4.0 will track your activity and recovery from your wrist and your clothes photo 1

Whoop 4.0

Whoop blends into the background, a way of life coach designed to suggestions in your relaxation and restoration, information you to raised sleep habits and to make higher decisions. It is not a substitute for a smartwatch or a health tracker, however for these wanting one thing obtrusive the Whoop is an attention-grabbing alternative.


  • Straightforward to sleep with
  • Plenty of knowledge within the app
  • Compact design

  • Battery life is not nice
  • Subscription costly in comparison with rival techniques
  • Not likely a health tracker


  • Interchangable bands
  • Limpet battery

A while in the past this reviewer complained about sleep monitoring being characteristic of watches that had been, properly, inconceivable to sleep in. You do not wish to be sporting the equal of a diver’s watch whenever you’re making an attempt to move off to the land of nod. Enter Whoop stage proper, with what quantities to a strap with a small sensor unit hooked up to it. In some ways, it is the identical concept because the Oura Ring.

The purpose is to scale back the footprint of your tracker, supplying you with one thing that you just simply put on with out actually fascinated by it, a tool that is not designed to be continuously tapped or swiped; there aren’t any buttons, direct interplay is actually minimal. It’s largely battery, nonetheless, powering the sensors that it accommodates and permitting Bluetooth connectivity to your smartphone.


That connectivity is crucial. Whereas Whoop will collect knowledge when not related, you’ll be able to’t entry any knowledge with out it first being synced by way of your telephone to Whoop’s servers for evaluation. In some methods, it is a bit like an inert bangle, with a variety of completely different strap kinds you’ll be able to select to make it extra thrilling, or to fit your type on that specific day.

You can even take away the strap fully and slip the sensor into appropriate Any-Put on clothes, so you need to use the monitoring with out having it in your wrist. The Any-Put on vary contains sports activities bras, boxer shorts, swim put on and varied bands, so there’s loads of versatility.

Adjustment of the usual elasticated band is solely a case of tugging the free finish to make it tighter, with a intelligent clasp mechanism to make it simple to take off. You would possibly by no means wish to take it off, however there’s nothing worse than strolling round with a soggy strap after having a bathe.


There aren’t any ports on the Whoop, charging occurs wirelessly by way of a battery that slides onto the highest of the sensor unit like a limpet. That battery has USB-C for charging, however this association means you’ll be able to slip on the battery to recharge your Whoop whilst you’re nonetheless sporting it. It is not appropriate with different wi-fi chargers and that is a bit annoying, as a result of for those who misplace that battery or head off on travels with out it, you can not recharge the Whoop and also you’d have to purchase a substitute ($49 / £44).

What metrics does it seize?

  • Optical coronary heart fee sensor
  • Blood oxygen
  • Movement

There is a suite of sensors within the Whoop 4.0 centred across the optical coronary heart fee monitor on the rear of the system. This sits towards your pores and skin to collect knowledge, very like different health trackers or smartwatches. This contains coronary heart fee knowledge, but additionally contains coronary heart fee variability, blood oxygen ranges and movement, from which issues like respiration fee could be detected.

Whoop app screens

The information is used to watch your exercise, with the Whoop 4.0 in a position to detect and categorise actions routinely, so it can detect a run or a cycle for instance, with out you having to start out and end that exercise by way of the app. However the mainstay of what Whoop does is monitor what’s taking place together with your coronary heart together with movement knowledge.

Fairly than feed you that info as you train, Whoop’s raison d’etre is how your physique is responding, particularly round relaxation. Out of your coronary heart knowledge it will possibly detect whenever you’re resting and utilizing the measure of coronary heart fee variability, it will possibly decide how properly rested you might be, and the way recovered you might be from pressure you place your self beneath every day.

This not solely offers you knowledge about your sleep effectivity, however acts as steering for the quantity of pressure you would possibly wish to put your self beneath the next day. In the event you’re properly rested, it is a good time to train. In the event you’ve not slept properly, it won’t be one of the best time to try that private greatest you’ve got been chasing.

whoop app and strap

It is not simply biometrics that Whoop makes use of: it additionally asks questions with a customisable day by day questionnaire. This may embrace issues like monitoring how a lot alcohol you’ve got consumed, what your eating regimen is like, what remedy you’ve got taken in addition to enable for issues like journey, system viewing and even sexual exercise. The purpose right here is to take note of different elements: it is well-known that alcohol adversely impacts your high quality of sleep and Whoop can pair up that knowledge and present you simply how unhealthy it’s.

How does Whoop report its findings?

The app is a vital a part of the Whoop expertise with knowledge synced into the cloud for processing. You possibly can then see the leads to the app, whereas issues like coronary heart fee are all the time accessible so that you can view, together with stress (which is actually when coronary heart fee is elevated, however there is no movement that is induced it). A few of the different knowledge would possibly take a while to seem, processing taking a bit time from whenever you get up to when sleep is reported within the app for instance.


There are longer delays if you have not had your telephone close by – for instance in case your telephone is off for the evening whilst you sleep. The app makes use of reminders when there’s one thing to view, from the morning report in your sleep, via to experiences on detected actions and weekly or month-to-month summaries, in addition to suggestions, for instance to encourage you to move to mattress earlier whenever you’re in sleep deficit.

Whoop is not a tool that is targeted on the short-term, as an alternative it is extra fascinated about long-term traits that will help you adapt your way of life and higher be taught to work together with your physique. In some ways, it is performing the identical capabilities as Garmin’s Physique Battery, all primarily based across the concept of selling restoration as a key facet of your way of life, not simply one thing you do whenever you’re not racing round.

The information that Whoop presents within the app is in depth, letting you take a look at your week, month or longer time durations, with the choice to share that knowledge with coaches or well being professionals. The information is actually damaged down into sleep, restoration and pressure, which is just about a 180 flip from different health trackers that put pressure (exercise) on the forefront and give attention to restoration as a secondary issue.

What’s Whoop wish to reside with?

As we mentioned, Whoop is not a short-term factor, so we have been sporting Whoop since late-2022 to get a full image of what the system presents. We have beforehand expressed issues sleeping in units and it admittedly took us a few weeks to be completely comfy sporting it to mattress. There are individuals who sleep in Apple Watch with none issues, nonetheless, and it will likely be very a lot all the way down to the person whether or not it is one thing that bothers you at evening or not.


A few instances this reviewer has woken up feeling as if the strap is just too tight and launched it and fallen again to sleep, solely to awake later and do it again up once more. When the sensors should not involved together with your pores and skin knowledge will not be captured, so in these situations, you would possibly find yourself with no knowledge for evening. Fortunately, nonetheless, it is a rarity – in all probability three events over 6 months and largely due to mendacity on the band whereas asleep.

We have additionally discovered it dependable at sleep monitoring – by no means has it counted lazy instances on a settee as us being asleep, one thing we have seen from different platforms. Typically Whoop will report a shorter sleep than you really had. This would possibly occur for those who rise up in the midst of the evening to go to the bathroom, for instance. On some events, Whoop will then say that is the sleeping completed, despite the fact that you then head again and have one other 4 hours. In these situations, it is simple to regulate the tip level of the sleep and Whoop will reanalyse the information. What it will not do, nonetheless, is permit you to manually add a sleep and anticipate that to be factored in. In the event you do not put on it to sleep, you aren’t getting the restoration knowledge and that is the entire level to sporting Whoop.

In the course of the day, nonetheless, Whoop is barely noticeable. It is not one thing we would put on as an alternative of a watch – until you are a type of individuals who has determined solely to make use of their telephone for checking the time – so we have been blissful to put on Whoop on one arm and Garmin on one other. It does imply, in fact, that if you wish to put on an everyday watch as an alternative of a smartwatch, you may nonetheless have all these metrics captured.


Over the time we have been utilizing Whoop, it is turn into an integral a part of day by day life, unobstructive sufficient to slide into the background, however a continuing and evolving supply of knowledge. Sure, you may know whenever you’ve had a nasty evening’s sleep. Sure, you in all probability know whenever you’re burdened, however Whoop may be the system that guides you to taking a extra structured method to your restoration, it’d enable you take sleep extra significantly as you pair up how you are feeling with the information out of your physique.

How properly does Whoop monitor train?

As we have mentioned a few instances, Whoop is not actually a health tracker, not in the identical approach as a Garmin Forerunner for instance. You possibly can’t look at your wrist to examine your tempo as there is no show. So if that is what you are searching for, then Whoop is not the system for you. It could share coronary heart fee knowledge with different techniques, so you need to use it as a coronary heart fee sensor together with your bike pc or treadmill for instance, by turning on Bluetooth transmit mode within the app.


For many individuals, Strava is the holy grail of train monitoring, and Whoop will sync with Strava too. It should share deliberate actions it detects as a part of a day by day abstract, exhibiting your pressure for the day and the way that sits primarily based in your restoration. That seems as a exercise in Strava, however naturally does not have issues like GPS knowledge, as Whoop does not assist GPS.

Different exercise is routinely detected and categorised, with Whoop in a position to detect some forms of train and simply determine durations of pressure at different instances, largely primarily based round movement and elevated coronary heart fee. Each run and cycle we have been on has been detected, however all have the identical error in frequent, which is that they typically do not mirror the precise period of the exercise. Whoop will usually see a couple of minutes earlier than and after the exercise as a part of it, even when coronary heart charges are at regular ranges. This would possibly see a 35-minute run reported as 40 minutes, for instance.

There’s additionally been some detection of actions that have not occurred and these spotlight some durations the place coronary heart fee detection is not correct. Essentially the most frequent reason for that is the strap not being worn tight sufficient, so the sensor does not then fairly detect precisely. That is one thing you may adapt to when sporting the Whoop for longer durations of time, but when we loosened it over evening for instance with out tightening it the next day, that is typically after we’d get a report of one thing excessive, like 4 hours of exercise at 90 per cent coronary heart fee threshold, which clearly hadn’t occurred.

As a runner, Whoop is not vastly helpful due to the dearth of knowledge visibility – there is no velocity, tempo, distance, or the rest, however as a bike owner utilizing a motorbike pc to seize most knowledge, Whoop can usefully add coronary heart fee into the combo, transmitting that to any system that can settle for an exterior Bluetooth coronary heart fee sensor. Nonetheless, what Whoop needs you to do is lead an lively life, sporting the band and to combine up your train to pressure your physique to make health positive aspects. It is rather more about supporting that lively way of life than it’s coaching for a particular sport.

How lengthy does Whoop’s battery final and what is the connectivity like?

The battery of the Whoop 4 will final about 3 days in our expertise and that is maybe the largest draw back of the system. Recharging is intelligent with that limpet-style battery that slides on, however that additionally solely presents a few fees. That leaves you with the sense that Whoop wants charging regularly and the dearth of assist for different charging requirements like Qi is an irritation. There’s additionally no strategy to reliably see how a lot cost is within the exterior battery, so that you may be carrying round a flat battery.

whoop battery

Connectivity is usually good as soon as related to a tool, however having moved smartphones a number of instances in the course of the overview of Whoop, we have discovered that pairing with a brand new telephone can typically be a bit hit or miss. That is left us typically carrying the previous telephone with us to sync Whoop, somewhat than battle to get it related to a brand new system. There simply appears to be a lack of expertise about why it will not join.

It can be irritating to get up and discover that knowledge is not synced and there is no actual strategy to drive the sync. You possibly can refresh the app, however typically it simply decides it isn’t syncing and you will have to go away it till it decides it is able to go.

whoop battery

We have solely had one or two events (out of about 180 nights) when no knowledge was captured regardless of the Whoop being worn. As irritating as that one event is, each different evening of missed knowledge has been via us releasing the strap in the course of the evening. In order that’s not a nasty monitor document for Whoop’s efficiency general.

What else does Whoop do?

Whoop is an evolving expertise. In the course of the time we have been reviewing Whoop 4.0, we have seen it add stress ranges, which may give you one other perception into your day. There’s additionally an entire teaching aspect to Whoop, making an attempt to information you to get the correct quantity of sleep. There’s additionally the choice to pick whether or not you wish to merely get by, or whether or not you wish to carry out. You possibly can then set alarms designed to wake you up whenever you’ve had the required quantity of sleep. Whoop is not the primary to have sleep-defined alarms, however once more, it is an extra characteristic to present Whoop customers a bit extra.

Whoop 4.0 will track your activity and recovery from your wrist and your clothes photo 1


Whoop 4.0 is an attention-grabbing system and for many who need extra info on their sleep and restoration, it comes beneficial. Actually, there is a degree of element within the knowledge captured that is comparable or extra expansive than different standard choices like Fitbit, Garmin or Apple Watch. What we like is that it exhibits you your coronary heart fee via sleep, not simply the zones. Having a tool that is bodily extra compact and simpler to sleep in is an inherent benefit – so long as restoration is your main curiosity, somewhat than sport coaching, through which case you would be higher off with one thing else.

Whoop blends into the background, a way of life coach designed to suggestions in your relaxation and restoration, information you to raised sleep habits and to make higher decisions. It is not a substitute for a smartwatch or a health tracker, however for these wanting one thing obtrusive, the Whoop is an attention-grabbing alternative.

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