Our verdict: The Index S2 is a well-made Wi-Fi scale that slots straight into Garmin Connect, which is exactly what Garmin watch owners want. Its body composition readings come from a basic foot-to-foot design, and it has changed little since its 2020 launch. At £129.99 it is fair value inside Garmin’s world and poor value outside it.
Garmin launched the Index S2 in July 2020 as a follow-up to its first Index scale. Six years on it is still the company’s only scale, and still a fixture in the shopping baskets of runners and cyclists who already log every session in Garmin Connect. Here is what you get for the money.
Garmin Index S2 at a glance
- Maker: Garmin Ltd.
- Price: £129.99 (Currys; same as the UK launch RRP); $149 in the US
- Subscription: none needed for scale data
- Measures: weight, weight trend, BMI, body fat %, skeletal muscle mass, bone mass, body water %
- Method: foot-to-foot bioelectrical impedance (no handle)
- Users: up to 16, recognised automatically
- Display: colour, with 30-day weight trend graph and weather widget
- Power: 4 x AAA batteries (included), rated up to 9 months
- Connectivity: Wi-Fi for data, Bluetooth for setup
- Size and weight: 310 x 320 x 28 mm, 1.99 kg
- Warranty: 2 years (Currys listing)
What the Garmin Index S2 does
The Index S2 is a straightforward smart scale. Step on barefoot and it weighs you, sends a small current up one leg and down the other, and estimates body fat, muscle, bone and water from the resistance. Results appear on the colour display and upload over your home Wi-Fi to Garmin Connect, so your phone does not need to be nearby.
The screen is the most thoughtful part. Alongside today’s weight it can show a 30-day trend graph and the change since your last weigh-in, which helps if you weigh before and after a long session to gauge sweat loss. You can toggle these widgets, and a weather forecast, from the Garmin Connect app.
Inside Garmin Connect, weight and body composition sit next to your training load, sleep and recovery data. Garmin’s watches use your weight in calorie estimates, so keeping it current makes those numbers a little less wrong.
Setting up the Index S2
Setup runs through the Garmin Connect app. Pair the scale over Bluetooth, enter your home Wi-Fi details, and add your height, age and sex to your profile, because the body composition equations depend on them. Each household member needs their own Garmin Connect account to be recognised automatically. After that, step on barefoot and wait for your name to appear before reading the numbers. Carpet feet are included in the box if your bathroom is carpeted, although a hard, level floor gives more consistent results.
Garmin Index S2 price
Garmin set a UK price of £129.99 at launch, and that is still what Currys charges. In the US, Tom’s Guide lists it at $149 and has seen it as low as $119, or £89 in the UK, during sales. Garmin sells a bundle with its Index BPM blood pressure monitor in the US only, at $299.
There is no subscription for scale features. Garmin offers an optional paid tier for its Connect app, but weight and body composition tracking do not depend on it.
What we liked
Seamless Garmin integration. For Garmin users, this is the whole point. No third-party bridges, no manual entries: readings land in Connect and flow to your watch.
Wi-Fi sync. Many cheaper scales use Bluetooth only and need the app open. The Index S2 uploads by itself.
Up to 16 users. That is double what most rivals allow, handy for a large household or a shared gym.
Long battery life on standard batteries. Garmin rates four AAA cells at up to nine months, and you can replace them in seconds.
Build quality. Reviewers including Tom’s Guide praise the slim glass design.
What we did not like
Basic body composition for the price. The Index S2 measures through the feet only. A 2008 study in Obesity Facts found that foot-to-foot consumer devices showed systematic bias for body fat against MRI and DXA, while hand-and-foot designs did not. For the same money or less, Withings and RENPHO offer multi-frequency or hand-and-foot measurement.
Few extras. There is no heart rate, no vascular or nerve check, and no visceral fat estimate.
No pregnancy or baby mode. Tom’s Guide flagged this, and Withings scales at similar prices have both.
Limited third-party support. Data sharing reaches a few services such as MyFitnessPal and Strava, far fewer than the Withings app.
Fingerprints and pairing quirks. The glass top shows footprints, and Tom’s Guide hit pairing errors on two phones during setup.
How the Index S2 compares
| Garmin Index S2 | Withings Body Smart | RENPHO MorphoScan Nova | |
|---|---|---|---|
| Price | £129.99 | £89.95 | £179.99 |
| Measurement | Foot to foot | Foot to foot, plus standing heart rate | Hand and foot, dual frequency |
| Visceral fat | No | Yes | Yes |
| Pregnancy mode | No | Yes | No |
| Sync | Wi-Fi to Garmin Connect | Wi-Fi or Bluetooth; Apple Health and Google Fit (Withings+ needed on accounts created from 13 October 2026) | Bluetooth |
| Users | 16 | 8 | 8 on scale, unlimited in app |
Withings Body Smart costs £40 less and adds visceral fat, standing heart rate and pregnancy mode, with broad app support.
RENPHO MorphoScan Nova costs £50 more but gives you a handle, segmental readings and dual-frequency measurement. See our RENPHO MorphoScan review.
Withings BodyScan 2 is in another league, and another price bracket, at £449.95. Our Withings BodyScan 2 review explains what the extra money buys.
Who should buy the Garmin Index S2
Buy it if you wear a Garmin watch, you want weight trends in Garmin Connect without extra apps, and you share the scale with several people.
Look elsewhere if you care about body composition detail, use Apple Health or Google Fit as your main hub, or need a pregnancy mode. If you have a pacemaker or other implanted electronic device, avoid bioimpedance scales and check the manual for a weigh-only option.
Garmin Index S2 FAQs
Is the Garmin Index S2 accurate?
It should be accurate for weight. Its body fat, muscle and bone figures are estimates from foot-to-foot impedance, which research shows can be several percentage points out against DXA. Use them for trends, measured at the same time each day.
Does the Garmin Index S2 need a phone?
Only for setup over Bluetooth. After that it uploads to Garmin Connect over Wi-Fi without your phone nearby.
How long do the batteries last?
Garmin rates the four AAA batteries at up to nine months, depending on use.
Does the Index S2 work with Apple Health or MyFitnessPal?
Garmin Connect shares data with a small number of partners, including MyFitnessPal and Strava. Apple Health support depends on Garmin Connect’s own settings, so check the app on your phone before relying on it.
Is there a newer Garmin scale?
Not at the time of writing. The Index S2, launched in 2020, remains Garmin’s current smart scale.
