Garmin
Garmin Index S2
$149.99
Released 2020-10
Best Smart Scales · head-to-head
Garmin Index S2 vs Fitbit Aria Air
A sourced, side-by-side comparison. Fitbit Aria Air is cheaper at $49.95. Every spec and price links to its source.
Fitbit (Google)
Fitbit Aria Air
$49.95Cheaper
Released 2019-10
Which is better: the Garmin Index S2 or Fitbit Aria Air?
On the specs we track, they're closely matched. The Fitbit Aria Air is the cheaper at $49.95.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Garmin Index S2 | Fitbit Aria Air |
|---|---|---|
| US price | $149.99 MSRP, Garmin US official | $49.95 |
| Brand | Garmin | Fitbit (Google) |
| Released | 2020-10 | 2019-10 |
| Metrics count | 6 | 2 |
| Max weight (lb) | 400 | 400 |
| Wi-Fi | Yes | No |
| Bluetooth | Yes | Yes |
| Multi user | Yes | Yes |
| Athlete mode | Yes | No |
| App ecosystem | Garmin Connect; limited Apple Health integration via third-party sync workarounds | Fitbit / Google Fit app |
| Release | 2020 | 2019 |
Sources — Garmin Index S2: garmin.com (verified 2026-06-15). Fitbit Aria Air: store.google.com (verified 2026-06-15).
What's the difference between the Garmin Index S2 and Fitbit Aria Air?
Where the two actually differ on the specs we track (4 of 7). Matching specs are omitted.
- Metrics count: Garmin Index S2 6 vs Fitbit Aria Air 2
- Wi-Fi: Garmin Index S2 true vs Fitbit Aria Air false
- Athlete mode: Garmin Index S2 true vs Fitbit Aria Air false
- App ecosystem: Garmin Index S2 Garmin Connect; limited Apple Health integration via third-party sync workarounds vs Fitbit Aria Air Fitbit / Google Fit app
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Garmin Index S2
All four hands-on reviews (DC Rainmaker, TechRadar, Tom's Guide, Engadget) survived verification. Consensus: the Index S2 is a well-built, premium scale that gives consistent weight readings and shines mainly for users already inside Garmin's ecosystem, but is expensive and pairs with a companion app that adds little context. DC Rainmaker is the only source with measured numbers, and body-composition (impedance) accuracy remains disputed. (4 sourced reviews, 4 lab-tested.)
Praised: Best fit for users already in Garmin's ecosystem (data syncs into Garmin Connect alongside activity stats); Solid, premium, well-built hardware and design; Consistent, accurate straight-weight readings.
Flagged: Expensive / premium-priced; hard to justify unless you're in Garmin's ecosystem; Companion app adds little context or insight on the metrics; Glass surface hard to keep clean; shows dust and toeprints.
Fitbit Aria Air
No sourced tester review yet.