I got the Oura Ring through Kickstarter earlier this year and have been wearing it daily since then. This has been one of the gadgets that has drawn the attention of friends, colleagues and strangers alike. The Oura Ring is primarily a sleep tracker with a variety of sensors to measure your activities and sleep 24×7. It connects to its app your phone through bluetooth for daily insights and analysis. In short, it functions just like the typical wrist worn fitness tracker with a focus on sleep tracking, but in a much smaller form factor which makes it more comfortable to wear all the time.

The ring is definitely a large one, and would not look out of place on Mogambo‘s fingers. That said, it doesn’t feel very heavy or uncomfortable to wear all the time if worn on the correct finger. The wife acceptance factor is also pretty low as I have found out over the last few months (I had to leave it behind during one of our family vacations), but it rarely fails to draw the attention of anyone seeing it for the first time.

The ring is not exactly symmetric and due to this, fits more comfortably on either the index & middle finger of your left hand or the ring & little finger of your right. There are also small protrusions on the inner bottom side of the ring for the heart rate and body temperature sensors, but they are imperceptible when worn.

I got the glossy black version and it has resisted scratches quite admirably though it can attract fingerprints. The completely waterproof nature of the rings ensures that it gets a regular cleaning every time you wash your hands or take a bath, so hygiene is taken care of unlike some smartwatches with straps that can’t be wet.

The battery life of the ring has also been great, lasting 2-3 nights and worn all day long, depending primarily on how long I sleep. The ring charger is basically the case it came in with a micro-USB port for charging. When the battery reaches around 10-12%, the ring seems to stop recording any information. A full charge takes about an hour in this state.

There have been quite a few firmware and app updates (about once a month) that have fixed bugs and tweaked how sensitive the ring is to activities. It also integrates with the Health app on iOS and sends the sleep data and resting heart rate every cycle.

The ring is pretty much passive in nature with no display or direct interaction mechanism. It instead uses the phone app to sends notifications like low battery or time to stand up. However, it does detect when it is worn and can accordingly activate its tracking. There are also ways to activate an airplane mode and reset it through the app.

Coming to its actual utility, I have found it to track my sleep quite well, though it is limited to one cycle a day. So, if you take a nap in the afternoon, it won’t show in the app, but it does track the info and seems to pass it on to the iOS Health app. For the sleep tracking, it detects the different phases of sleep – light, deep & REM – along with your resting heart rate and body temperature. It then gives a score to the sleep cycle and your overall readiness depending on a variety of factors, and provides a few suggestions for the day.

The ring gradually learns your the range of your typical vitals and adapts its analysis accordingly. For example, one night I was coming down with a fever and it was able to detect the elevated body temperature and higher than usual body temperature to give a basic diagnosis the next morning.

I have found the ring to be quite useful to better understand my sleep patterns and the sources of disturbances in the cycle. There are however times when I have not been able to follow through on the suggestions given and at the end of the day a fitness tracker can only provide guidance but not enforcement for healthy habits.

There are also some areas of improvement for the ring – tracking multiple sleep cycles in a day for one and passing on the wealth of information it captures to the Health app for another. The latter area is especially one where the ring seems to be capturing a lot of data points, but not exposing them directly to the end user.

The Oura ring has turned out to be one of my most interesting backed projects on Kickstarter and it definitely is a precursor of things to come in the wearables and IoT space beyond today’s wrist worn devices. A hat tip to the Four short links post that led me to Oura.