Keeping track of blood pressure usually means sitting down, putting on an upper-arm cuff, and taking a reading at a particular moment. Hilo offers a different approach. Its wearable Hilo Band is designed to monitor blood pressure throughout the day and night, helping users understand how their readings change over time.
Previously associated with the Aktiia brand, Hilo combines a wrist-worn device, a companion mobile app, and a calibration cuff. The system is designed to collect blood pressure readings automatically and turn them into trends, reports, and insights that users can review themselves or share with healthcare professionals.
In this Hilo review, we examine the Hilo Band’s features, UK pricing, subscription arrangements, accuracy considerations, and customer feedback. We also look at who may benefit from continuous monitoring and what to consider before buying.
What Is Hilo?
Hilo is a wearable blood pressure monitoring system developed by Aktiia SA, a Swiss company specialising in optical blood pressure technology. The product is designed to measure blood pressure without requiring users to inflate a traditional cuff for every reading.
The Hilo system combines three main elements:
- Hilo Band: A wrist-worn device that collects optical signals used to calculate blood pressure and track other measurements, including heart rate.
- Hilo App: A mobile application that displays readings, trends, and personalised insights.
- Hilo Cuff: A conventional upper-arm blood pressure cuff used to calibrate the wearable and maintain measurement accuracy.
Hilo is intended for adults who want a more detailed picture of their blood pressure patterns than occasional measurements alone can provide. It is a medical monitoring product, not simply a smartwatch fitness feature.
Hilo Band Features and How It Works
1. Continuous Blood Pressure Monitoring
The Hilo Band is designed to collect blood pressure readings automatically throughout the day and night. The company advertises up to approximately 33 readings per day, although the number of successful readings displayed can vary depending on signal quality and the user’s circumstances.
Instead of relying on a single measurement, the app presents readings over time. This can help users see how their blood pressure varies between periods of rest, activity, and sleep.
Continuous monitoring may be useful for people who want more context for their measurements, but it does not mean that every reading is guaranteed to be accurate or that the wearable replaces medical assessment.
2. Optical Blood Pressure Technology
The Hilo Band uses photoplethysmography, commonly known as PPG. This technology shines light into the skin and measures changes in the light reflected back as blood volume changes with each heartbeat.
Hilo’s algorithms analyse the optical signal and its waveform to estimate blood pressure. This is different from a conventional upper-arm cuff, which measures pressure through the inflation and deflation of a cuff around the arm.
The technology is designed to provide a more convenient way to gather readings, but users should understand that optical blood pressure monitoring depends on the quality of the signal and proper calibration.
3. Calibration with the Hilo Cuff
The Hilo Band is not intended to operate as a completely calibration-free device. The system uses a traditional upper-arm cuff to establish and periodically maintain calibration.
Hilo’s UK information describes a calibration process involving the band and a connected blood pressure cuff, with periodic calibration recommended as part of ongoing use. The company’s current guidance indicates that users should recalibrate approximately every 30 days.
Calibration is an important part of the product’s measurement system. Buyers should be comfortable following the instructions, using the cuff when required, and checking the app for calibration reminders.
4. Blood Pressure Trends and Health Reports
The Hilo App is designed to present more than a list of individual measurements. It displays blood pressure trends and can help users explore how readings vary throughout the day, during sleep, and in relation to activity.
The app also provides reports that users can share with healthcare professionals. These reports may help support a conversation with a doctor by providing a record of measurements over a period of time.
However, a report from a wearable should be treated as supporting information. It does not independently diagnose hypertension or determine whether treatment is needed.
5. Sleep and Activity Tracking
Hilo combines blood pressure information with sleep and movement data to provide additional context. The aim is to help users understand patterns rather than simply view isolated numbers.
For example, the app may help users compare their measurements during different periods of the day or review changes in their readings alongside activity and sleep information. These observations can be useful for personal tracking, but they should not be interpreted as proof that a particular habit caused a blood pressure change.
6. Battery Life and Everyday Wear
The Hilo Band is designed for regular, day-and-night use. The company advertises battery life of up to 15 days, depending on use and conditions.
The wearable is also advertised as IP68-rated and suitable for everyday exposure to water, including showering and swimming under the stated conditions. It is not intended for diving or snorkelling.
Battery performance and comfort will depend on individual use. People who prefer a conventional smartwatch display or who do not want to wear a device overnight may find the Hilo Band less appealing.
Hilo UK Price and Subscription Cost
Hilo’s UK website currently advertises a package that includes the Hilo Band, Hilo Cuff, and a one-year membership. The price displayed during research was:
| Product or charge | Advertised UK price |
|---|---|
| Hilo Band + Hilo Cuff + one-year membership | £199.98 |
| Membership renewal after the first year | £119.99 per year |
The first-year package provides the wearable, calibration cuff, and membership access. The ongoing membership is an important part of the total cost, so buyers should consider the renewal price rather than comparing only the initial purchase.
Prices and promotions can change. Confirm the amount charged, subscription renewal date, and cancellation options at checkout before placing an order.
Check the current offer: Hilo UK official website.
Is Hilo Clinically Validated?
Hilo describes the Band as a CE-marked Class IIa medical device for blood pressure monitoring in adults. Its UK website also refers to clinical studies and validation work supporting the technology.
The company describes the system as using optical blood pressure monitoring with calibration against a conventional upper-arm cuff. This is a more specialised approach than the heart-rate and activity tracking found in many consumer wearables.
Nevertheless, a medical-device designation should not be interpreted as meaning that every measurement will be correct in every situation. Performance may depend on calibration, signal quality, the user’s physiology, and the conditions under which readings are taken.
Hilo’s own guidance indicates that readings with insufficient signal quality may be discarded. The device may therefore not display a measurement every time a user expects one.
Anyone using Hilo to support a medical decision should follow the manufacturer’s instructions and discuss its use with a healthcare professional. Do not change prescribed medication or treatment based solely on wearable readings.
Hilo App and Compatibility
The Hilo App is the main place to review readings and trends. It connects to the Hilo Band and displays blood pressure measurements, heart rate information, and other available health insights.
The app is designed to support:
- Reviewing blood pressure readings and longer-term trends.
- Viewing sleep and activity information alongside measurements.
- Receiving calibration reminders and product guidance.
- Creating reports that can be shared with healthcare professionals.
Before purchasing, check the official app listing for the latest supported phone models and operating system requirements. Compatibility can change with software updates.
Shipping, Returns, and Warranty
Hilo sells products through its online store and may also distribute them through authorised resellers. The applicable policies depend on where the product was purchased and which country the order is delivered to.
For direct UK purchases, the company’s published terms include a 15-day withdrawal period for eligible orders, subject to the conditions of its return policy and applicable consumer law.
Customers should check the following before ordering:
- Delivery: Confirm whether the product is available for delivery to your address and whether shipping charges apply.
- Returns: Review the withdrawal period, product condition requirements, and any exclusions.
- Subscription: Check the renewal date, recurring fee, and cancellation procedure.
- Warranty: Confirm the warranty period and the process for handling defective hardware.
Products purchased from an authorised reseller may be subject to that retailer’s returns and refund process. Keep your order confirmation and proof of purchase in case you need support.
Policy information: Hilo UK terms and conditions.
Customer Reviews: What Do Hilo Users Say?
Customer feedback on Hilo, including reviews associated with the earlier Aktiia brand, is mixed. Some users appreciate the convenience of wearing a monitor continuously and being able to review their blood pressure patterns over time.
Positive reviews often highlight the comfort of the wearable, the value of having more readings available, and the ability to share information with a healthcare professional. Other reviews raise concerns about measurement consistency, missing readings, app experience, or the cost of ongoing membership.
Hilo’s Trustpilot profile displays reviews from customers across the brand’s history, including reviews associated with Aktiia. Scores and review counts change over time, so the current profile should be checked before publication.
As with any health-monitoring device, individual testimonials are not a substitute for clinical evidence. A review describing a useful experience does not establish that the device will provide the same results for every person.
Read customer feedback: Hilo on Trustpilot.
Pros and Cons of Hilo
Pros
- Designed to collect blood pressure readings automatically throughout the day and night.
- Provides longer-term trends rather than relying only on occasional cuff measurements.
- Combines a wearable, companion app, and calibration cuff in one system.
- Offers reports that can be shared with healthcare professionals.
- Advertised battery life of up to 15 days supports regular use.
- May be useful for adults who want a more detailed record of their blood pressure patterns.
Cons
- The initial package and annual membership may be expensive compared with a basic upper-arm monitor.
- Periodic calibration with a conventional cuff is still required.
- Not every attempted measurement will necessarily produce a displayed reading.
- App and device compatibility should be checked before purchase.
- Continuous data can be difficult to interpret without appropriate medical guidance.
- Customer feedback includes concerns about measurement consistency and subscription value.
Who Should Consider Buying Hilo?
Hilo may be worth considering for adults who want to track blood pressure patterns over time and are comfortable wearing a device throughout the day and night.
It may be particularly interesting to people who have been advised by a healthcare professional to monitor their blood pressure regularly and who want to discuss a broader set of measurements during appointments.
However, a conventional validated upper-arm blood pressure monitor may be a more practical and affordable choice for people who only need occasional measurements. Hilo also requires users to follow its calibration process and understand the limits of wearable readings.
People who have a diagnosed cardiovascular condition, are taking medication, or are using readings to guide treatment should discuss the suitability of Hilo with their healthcare professional before relying on it for monitoring.
Is Hilo Worth It?
Hilo offers a different approach to blood pressure monitoring by combining a wrist-worn device, optical measurement technology, calibration, and an app for reviewing trends. Its main appeal is convenience and the ability to collect more information than a traditional monitor used only occasionally.
The system is more expensive than a basic blood pressure cuff, particularly when the annual membership renewal is included. Its value therefore depends on whether continuous tracking and app-based reports are useful for the buyer’s needs.
Our verdict: Hilo is an interesting option for adults who want more detailed blood pressure tracking and are prepared to follow the calibration and subscription requirements. It is not an automatic replacement for a conventional upper-arm monitor or professional medical advice. Before buying, check the current UK price, renewal fee, device compatibility, and whether your healthcare professional considers the system appropriate for your situation.
Final Thoughts
Hilo aims to make blood pressure monitoring more convenient by combining a wearable device with automatic measurements and an app that helps users review longer-term patterns. For adults who want more context about their readings, the approach may offer useful information to discuss with a healthcare professional.
The main considerations are cost, the annual membership, calibration requirements, and the limits of wearable blood pressure technology. If those trade-offs suit your needs, Hilo may be worth exploring. If you only need occasional blood pressure checks, a validated upper-arm monitor may be a simpler alternative.
Always use blood pressure readings as part of an appropriate monitoring plan and seek medical advice when interpreting results or making decisions about treatment.
