4iiii Viiiiva review

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Heart rate monitors are all the rage at the moment, even if there is a big discussion ongoing about how accurate they really are. However, that doesn’t mean one more company can’t get in on the action, which is exactly what 4iiii is trying to do with its Viiiiva wrist strap version.


The 4iiii Viiiiva is, relatively standard for a heart monitor, despite its spellcheck testing name. It consists of a small sensor that can attach to a wrist strap to track your heart rate. On its own, that’s about it really, but the Viiiiva does track your heartbeat at a high level of accuracy.

What separates the Viiiiva from all the other heart rate trackers out there, is what it can do when it comes to hooking up with other tools. If you own a Sportiiiis performance coach for example, you can feed this information into it and it will help tailor your workout to your current activity level. It can also send information to the free 4iiii heart rate app, to give you a break down of what your heartbeat is like in real time and over longer periods.

The especially exciting thing with the Viiiiva though, is that it also can connect up with a number of different ANT+ devices, acting like a transmission hub and sending all that data to the accompanying bluetooth application, for easy viewing in one place.

In terms of battery life, the Viiiiva can last for up to a year on a single coin cell battery.



At the time of writing, you can buy the Viiiiva from the official store for $80 (£48) with a full sensor suite kit costing closer to £120. Other sensors can also be bought separately for a variety of prices, though the most expensive is around $70.


While it certainly is unique, I think the name of the 4iiii Viiiiva is going to hold it back immeasurable. People are going to spell it wrong, not knowing how many i’s to put in and people may not know if it’s a letter or a number, or a lower case L depending on the font. It’s a weird one that I’m not really sure why it was chosen. All of the products are the same too, making the whole range seem somewhat obscure.

The Viiiiva is also only available on iOS at the moment, with no mention of a future Android update.

Bottom Line

The product itself seems interesting and I’d like to see how it integrates with all the other sensors, but the fact that Android isn’t included in the official support is just silly. It’s a far bigger audience than iOS. The name is also awful, but with the company using a similar scheme, it’s unlikely to change.