Updated October 14, 2026 · ThriveCue Editorial Team
Circular vs METZ
Where Circular and METZ differ
| Compare |  Circular |  METZ |
|---|---|---|
| Price from | $349 | €99.90 |
| Battery life | 8 days | 10 daysHigher |
| Water resistance (m) | 50 | 100Higher |
| Warranty | 1 year | 2 yearsHigher |
| Markets | LV, JP, IN, TH, CN, ID, VN, HK, SG, TW, KR, PH, MY, BD, KH, AL, DE, AD, AM, AT, BY, BE, BA, BG, CY, VA, HR, DK, ES, EE, FI, GE, GI, GR, GL, GG, HU, IM, AX, FO, IE, IS, IT, JE, XK, LI, LT, LU, MK, MT, YT, MD, MC, ME, NO, NL, PL, PT, CZ, RE, RO, SM, RS, SK, SI, SE, SJ, TR, UA, FR, IL, FJ, MX, PF, PG, AZ, LA, LB, LK, MN, MO, NP, PK, PS, TJ, UZ, AR, BR, CI, CM, CO, CV, DZ, EC, EG, GA, GF, GH, GM, GN, GW, LY, MA, MG, ML, NE, NG, PE, SN, TN, UY, ZA, BL, MF, MQ, PM, CL, CA, SC, BH, OM, SA, QA, AE, KW, MM, JO, AU, NZ, CH, GB, USCovers more | AT, BE, BG, HR, CZ, DK, EE, FI, FR, DE, GR, HU, IS, IE, IT, LV, LT, LU, NL, PL, PT, RO, SK, SI, ES, SE |
| Membership per month | $0 | Not confirmed |
Same on both: Platforms (iOS, Android).
We earn a commission when you sign up through links on this site. Partner status can affect where a brand appears in our rankings.
Key differences
- METZ scores higher overall: 9.0 vs 8.8.
- Battery life is higher at METZ: 10 days vs 8 days.
- Water resistance (m) is higher at METZ: 100 vs 50.
- Warranty is higher at METZ: 2 years vs 1 year.
- Support channels: only Circular offers Chat.
- Support channels: only METZ offers Phone.
- Circular is available in 104 more countries.
- Products: only METZ offers Smartwatch.
- Health sensors: only Circular offers Ecg, Hrv, Blood pressure.
- Markets: only Circular offers JP, IN, TH.
Our verdict on each
Circular
Circular suits anyone who wants a smart ring without a recurring subscription, and it holds the top spot on membership cost with a monthly fee of $0. The catch is endurance: 8 days of battery sits below what rivals manage.
METZ
METZ suits European buyers who want a smart ring and a smartwatch from one young brand, with the METZ entry product at €99.90 and a 2 years warranty behind it. The trade-off is battery: the ring runs 10 days, below the smart ring field median, so value buyers gain more here than endurance buyers.
Score breakdown
| Area | Circular | METZ |
|---|---|---|
| Cost | 8.8Entry price of $349 ranks 29 of 31, and the membership costs $0. | 9.2HigherEntry hardware at €99.90 sits under both category medians: €99.90 and €174.52. |
| Offer | 8.8Membership fee of $0 places it 1 of 21 on that measure. | 9.3HigherA smart ring and smartwatch range, apps on iOS and Android and water resistance to 100 m in a small, focused catalogue. |
| Trust | Not confirmed | 8.0UAB Hiperfarma in LT, founded 2023, with support on email, phone and help centre. |
The numbers side by side
| Fact | Circular | METZ |
|---|---|---|
| Battery life | 8 days | 10 days |
| Water resistance (m) | 50 | 100 |
| Warranty | 1 year | 2 years |
Positions in our rankings
| Ranking | Circular | METZ |
|---|---|---|
| Smart rings | 12 of 14 | 4 of 14 |
Every fact side by side
| Fact | Circular | METZ |
|---|---|---|
| Products | Smart ring | Smart ring, SmartwatchCovers more |
| Health sensors | Heart rate, Spo2, Ecg, Skin temperature, Hrv, Sleep, Blood pressureCovers more | Heart rate, Spo2, Skin temperature, Sleep |
| Legal entity | Circular Health Limited | UAB Hiperfarma |
| Headquarters | France | Lithuania |
| Founded | Not confirmed | 2023 |
| Support channels | Email, Chat, Help centre | Email, Phone, Help centre |
Where each stands against the rest
| Fact | Circular | METZ | Median |
|---|---|---|---|
| Membership per month | $0at the median | Not confirmed | $0 |
| Battery life | 8 daysbelow the median | 10 daysbelow the median | 14 days |
| Water resistance (m) | 50at the median | 100above the median | 50 |
| Warranty | 1 yearat the median | 2 yearsabove the median | 1 year |
Median across 27 listed brands.
Pros and cons
Circular
Pros
- No recurring membership charge at $0, which ranks 1 of 21 brands.
- Entry price of $349 is a single hardware cost rather than a package that hides a subscription.
- Water resistance of 50 metres suits swimming, showering and general wear.
Cons
- Battery life of 8 days ranks 16 of 23 brands, so charging is more frequent.
- The entry price of $349 sits at 29 of 31 brands, so the hardware itself is not the cheapest.
- Support runs on email, chat and help centre only, with no phone line listed.
METZ
Pros
- The range covers smart ring and smartwatch, so a ring and a watch come from one seller rather than two.
- The ring's heart rate, spo2 and skin temperature cover heart rate, blood oxygen, skin temperature and sleep, and the apps run on iOS and Android.
- Support runs on email, phone and help centre, so email, phone and a help centre are all available routes.
Cons
- Battery life of 10 days falls short of the smart ring median 14 and of the smartwatch median 11.5.
- The catalogue stops at smart ring and smartwatch, while Amazfit lists smartwatch, fitness tracker and smart ring, so a chest strap and a smart scale sit outside the METZ range.
- Shipping reaches AT, BE and BG, and that list does not extend past those markets.
Who each suits
Circular
Who it suits
- Buyers who want a ring and no monthly membership, given the fee of $0.
- People who care about durability over battery, with resistance of 50 metres and a 1 year warranty.
- Senders who travel often, since Circular Health Limited ships across LV, JP and IN.
Who should look elsewhere
- Battery-first buyers, who should look at Oura, where the entry price starts at €265.30.
- Shoppers who want a ring plus a watch, since Amazfit and Samsung both list wider product ranges while Circular sells smart ring only.
METZ
Who it suits
- Value buyers inside METZ's shipping markets, who get a ring and a watch starting at €99.90 with a 2 years warranty behind them.
- People who want phone and help centre support rather than email alone, since support runs on email, phone and help centre.
- Swimmers and showerers, since the ring is water resistant to 100 m and reads heart rate, blood oxygen, skin temperature and sleep.
Who should look elsewhere
- Readers who want fitness trackers as well as watches, since Runmefit lists smartwatch and fitness tracker and the METZ range is smart ring and smartwatch.
- Shoppers who want a chest strap or a smart scale, since Amazfit lists smartwatch, fitness tracker and smart ring and those types are not in the METZ range.
- Watch-only buyers, since Oukitel's smartwatch is a watch line and METZ splits smart ring and smartwatch between a ring and a watch.
Country by country
| Country | Circular | METZ |
|---|---|---|
| Aland Islands | Yes | No |
| Albania | Yes | No |
| Algeria | Yes | No |
| Andorra | Yes | No |
| Argentina | Yes | No |
| Armenia | Yes | No |
| Australia | Yes | No |
| Azerbaijan | Yes | No |
8 of 130 countries where either is available.
Questions about each
Circular
How much does the Circular ring cost?+
The entry price is $349, charged for the hardware itself. There is no joining fee to use it, since the membership costs $0. Readers comparing total ownership over several years will find the hardware cost is front loaded rather than spread across a subscription.
Is there a membership fee for Circular?+
No monthly membership is charged, as the membership costs $0. That places Circular 1 of 21 brands on that measure. It is the main reason to pick this ring over rivals that tie the app to a recurring plan.
METZ
What does METZ cost to get started?+
The METZ entry product is €99.90, a hardware price set against the smartwatches and fitness trackers median of €99.90 and the smart rings median of €174.52. Buyers working to a budget get entry level gear here for less than the typical price in either category.
How long does the METZ ring last on a charge?+
The listed ring runs 10 days, under the smart ring median of 14 and under the smartwatch median of 11.5. METZ ranks 13 of 23 brands on battery days, so plan on regular charging rather than a set and forget device.