Yay or nay?
Discover what the internet is saying about Circular.

Upgraded Reviews scanned the web to find out what real users are saying about Circular.
See the highlights below and decide for yourself!

Table of contents
- ✅ Pros
- ❌ Cons
- ⚖️ Summaries
- 💸 Top Discount
✅ Pros
“The app’s intuitive interface and the ring’s precise data collection create an efficient and user-friendly health monitoring system, simplifying the usage and understanding of collected health data.”

“With an IPX8 rating, the Ring Slim is water-resistant to a point; it can handle being submerged in 1.5 meters of water for 30 minutes.”
“App contains plenty of data.”
“When you need to charge the ring, it comes with a very portable charger that you can clip onto your keys.”
“It looks and feels decent, collects a variety of data, and offers genuinely useful insights.”
“You can also take real-time readings, including heart rate, heart rate variability, SpO2 and activity intensity.”
“It has a comfortable design.”
“It is more affordable than Oura.”
“There are no subscription fees.”
“Some core tracking feels mostly reliable.”
“App connectivity is much improved.”
“There is no subscription fee.”
“Vibration motor is great to have.”
“It has sensible price.”
“No subscription is required.”
“In addition to tracking fitness data, the Circular ring has a built-in vibration feature that can wake you up.”
“There is Novel AI on the app.”
“It has a smart alarm feature.”
“It offers novel haptics (vibrations).”
“It doesn’t require a subscription to access all of the features and insights available.”
“Another unique feature of the Circular Slim is an artificial intelligence–powered assistant called “Kira.””
“It is lightweight, sleek and good-looking.”
“The outer shell of the ring is actually aluminum.”
“It is thin and light.”
“Kira+ assistant is step in right direction.”
“The design of both the Circular Pro 1 and the Slim versions stands out for its elegant, minimalist aesthetic, combining functionality with style.”
“It tracks lots of health metrics.”
“The virtual assistant in the app is smart.”
“You can access these metrics by downloading the Circular app, available on Android and iOS.”
“It has plenty of fitness and health tracking features, including AI assistant.”
“General advice can be informative.”
“It comes with PPG, temperature, and motion sensors for comprehensive fitness tracking.”
“The Circular Ring Slim weighs just 2g, so it’s satisfyingly light.”
“You can set a gentle vibrating alarm that goes off at your lightest sleep stage sometime around your specified wake-up time.”
“It has decent sleep tracking.”
“It tracks a lot of metrics.”
“It includes sleep and activity tracking and monitors vital metrics like heart rate, SpO2, HRV, and temperature, providing valuable insights into physical well-being.”
“It is comfortable to wear.”
“It has a unique inner shape.”
“It is slim and light.”
“From a durability point of view, the Ring Slim carries an IP68 rating, which means it can be submerged in water up to 5m for 30 minutes.”
“It comes with a useful Kira+ assistant for fitness tracker newcomers.”
“The app also has an AI feature that suggests activities based on your fitness data.”
“The aptly named Circular Slim has a sleek, unobtrusive design.”
“It offers some good tracking data.”
“It collects health and wellness data, including sleep, stress and steps.”
“It is the slimmest ring on the market.”
“IP68 means you can swim with it.”
“The ring is backed by a 14-day return period and a one-year warranty.”
“There are no subscription fees.”
“Haptic vibrations for alarms and timers are cool.”
“The Circular Ring Slim is light and comfortable to wear.”
“It gives helpful tips via the app and AI wellness assistant, especially for sleep.”
“It has a lightweight and comfortable design.”
“All of the data is synced to the Circular companion smartphone app, which is available for both iPhone and Android.”
“Getting up and running with the Circular Ring Slim smart ring isn’t difficult.”
💸 Top Current Discount
❌ Cons
“App has some data loading and syncing issues.”
“App is frustrating.”
“The app needs decluttering and is a bit buggy.”
“It only comes in one color.”
“The design options are limited.”
“Step tracking is abysmal and needs to be vastly improved.”
“It has unreliable features, data, and app.”
“App has some connectivity issues.”
“It has unreliable loading and syncing of data.”
“It fails to track sleep properly.”
“There is no third-party app integration.”
“It doesn’t always connect to the app when you’re wearing it.”
“Distance tracking did not work and heart rate tracking was highly unreliable, even for stationary workouts.”
“While the ring tracks standard health metrics effectively, it lacks more advanced or specialized health parameters.”
“Exterior scratches in no time.”
“It is very wide.”
“It is uncomfortable to wear.”
“Battery life is terrible, even on eco mode.”
“It has average battery life.”
“App is cluttered and buggy.”
“Companion app isn’t pretty and can be buggy.”
“It is not fully water resistant.”
“Charger is inconvenient.”
“It has short battery life.”
“Exterior scratches easily.”
⚖️ Final Say
Read the summaries of what reviewers think about Circular below.

“Ultimately, I found the Circular Slim Ring to be an intriguing window into my health and sleep patterns. The app delivered valuable insights and attainable suggestions. Battery life and app experience are both features that the company can improve on.”
“Dubbed the ‘world’s thinnest smart ring’, the Circular Ring Slim lives up to these expectations with its lightweight and comfortable design. It uses a combination of sensors to measure and collect health and wellness data, and the accompanying app offers a wealth of knowledge about your wellbeing. However, the features and functionalities of the Circular Ring Slim gets lost, as the battery life is terrible and the app has too many syncing and loading issues. It needs some serious improvements to compete with the likes of Oura or Ultrahuman.”
“The Circular Ring Slim is lightweight and comfortable to wear. Unfortunately, that’s largely where the positives end.”
“It packs in almost all the standard features plus some unique innovations – all at an accessible price point. The ring seems well made but might scratch whereas the app is solid enough but needs usability improvements.”
“The Circular Ring Slim is a thinner, lighter, and sleeker version of the Circular Ring Pro. It offers the best of the Pro model in a much nicer form factor and is one of the lightest smart rings on the market. It’s available in eight sizes, and the battery lasts up to five days. It’s compatible with iOS and Android and comes with a USB-C charger in the box.”
“The Circular ring slim is far from perfect. We absolutely hated the way it charged via a weird USB-C contraption, and it lacks exercise tracking, but there are features here that you won’t find on the Oura, such as haptic alarms and medication reminders.”
“The Circular Ring Slim delivers some solid fitness and wellness tracking from your finger, but the software experience that goes with it needs refining to make it well-rounded experience.”
“The Circular Ring Slim is a smart ring that offers a lot of the monitoring smarts that Oura can, but does it from a design which isn’t as attractive and also uses an app that just feels a little cluttered and in need of some finessing.”
“The Circular Ring Slim is a smart ring designed to compete with Oura and Ultrahuman, sporting a svelte design and 24/7 health tracking. The accompanying app serves up a wealth of data and useful insights; but niggles with battery life, syncing issues, scratches and confusing wording in the app mean the Circular Ring Slim feels more like a first draft than a finished product.”
“The Circular Ring is a good choice for those valuing style and essential health tracking in a wearable device. But for those needing extensive health features, robust durability, and longer battery life, other options might be more suitable.”
“The Circular Smart Ring Slim’s few good points are marred by design that’s too easy to scratch and a companion app that needs to work on how it presents your data. When you compare it to apps from similar rings like Oura, RingConn and Ultrahuman, it misses the mark.”
“I was hoping for a lot more out of the Circular Ring Slim, but since I’d already reviewed the RingConn ring and like everything about it including the long battery life, it’s tough to recommend the Circular ring because the battery life is worse, step tracking isn’t accurate, and stress tracking seems off the mark. Since the main metric that I like to keep track of is my activity / steps, I can’t recommend this smart ring.”
“The Circular Ring Slim is a newcomer in the smart rings community but offers plenty of health-tracking features and an AI assistant. You don’t need a subscription, but its features need further development.”
“The Circular Ring Slim is a powerful smart ring with a heaping of health sensors and an AI assistant that can give you pointers to improve your overall health.”
“The Circular Smart Ring Slim provides a wealth of information about your body, but its tracking isn’t reliable enough. Although it’s lightweight and slim, I didn’t find the design attractive, or durable, and the battery life is short in performance mode.”
