Comparison

Amazfit Helio vs Fitbit Air: Two Budget-Friendly Whoop Alternatives Compared

Whoop has a subscription problem — and both the Amazfit Helio and the new Fitbit Air have independently decided to solve it at the $100 price point. Two devices, two philosophies, zero mandatory subscriptions. If you're looking to get serious health tracking without the Whoop tax, this is the comparison you need.

We build accessories for both of these devices at EverythingStraps, so we know them deeply. Here's the honest assessment of how they compare — and who should buy which.

The Shared Premise: Beating Whoop on Cost

Let's start with why both devices exist in the same conversation. Whoop 5.0 costs $199/year minimum just to use the device you got for free. Want AFib detection? That's $359/year. Over three years, you've spent $597 to $1,077 on a wearable tracker — and you own nothing. Stop subscribing, the device stops working.

Both the Amazfit Helio and the Fitbit Air offer a fundamentally different deal: pay once, use forever, no recurring cost for core features. That shared premise makes them natural companions in this comparison — and natural competitors to Whoop's business model.

The Fitbit Air's 8.3mm pebble is the thinnest tracker in this comparison — at 5.2g, it competes in a category of its own for wearability.

How They Stack Up Against Each Other

Where Fitbit Air Pulls Ahead

AFib Detection — The Cardiac Health Advantage

The Amazfit Helio does not detect atrial fibrillation. The Fitbit Air does — and it's FDA-cleared, included in the base $99.99 price. For anyone over 40, anyone with a family history of cardiac issues, or anyone who simply wants a more comprehensive health monitoring device, this is a meaningful advantage that the Helio cannot match.

Skin Temperature Sensor

The Fitbit Air includes a skin temperature sensor; the Helio does not. Skin temperature variation is useful for detecting early signs of illness, tracking menstrual cycle phases, and understanding the physiological impact of stress. It's a small sensor that adds significant health context over time.

Weight and Form Factor

At 5.2g pebble / 12g with band, the Fitbit Air is dramatically lighter than the Amazfit Helio's ~30g. For 24/7 wear — especially during sleep — lighter is genuinely better. Less movement artifact, less wrist pressure, easier to forget you're wearing it.

Google Health App & Gemini AI

The Zepp app (Amazfit's companion app) is functional but not particularly polished. Google Health is a significantly better product — cleaner design, better data visualization, and optional Gemini AI coaching that provides personalized recommendations based on your health data. If app experience matters to you, this is a real difference.

Where Amazfit Helio Pulls Ahead

Battery Life — The Endurance Champion

The Amazfit Helio can last up to 12 days on a single charge. The Fitbit Air delivers 7 days. If you travel, go on multi-day trips, or simply hate thinking about charging, the Helio's extra stamina is genuinely useful. The Fitbit Air's fast charge (5 min = 1 day) partially compensates, but raw battery life is the Helio's strongest card.

Standard 22mm Band System — The Freedom Advantage

This is the Amazfit Helio's defining advantage for accessory-minded buyers. The Helio uses a standard 22mm lug width — the same as many quality watches — which means you can use literally any 22mm band available anywhere. And it means EverythingStraps can make a comprehensive range of accessories for it right now.

The Fitbit Air uses a proprietary sliding clip system, which limits your options to official Fitbit Air bands — unless you use the EverythingStraps adapter that's coming. At launch, the Helio is ahead on band flexibility.

EverythingStraps Makes Both Better

At EverythingStraps, we've built our product range around a single belief: the band you wear your tracker on matters as much as the tracker itself. Comfort, breathability, security, and style — the band determines all of these.

Who Should Buy Which Device?

The Bottom Line

Both the Amazfit Helio and the Fitbit Air make Whoop's $199/year subscription look hard to justify. They're priced identically, both offer no mandatory subscription, and together they cover most health monitoring needs that the average athlete or health-conscious person actually has.

If you're choosing between them: the Fitbit Air is the more technically impressive device — lighter, with better sensors and a better app. The Amazfit Helio is the more accessory-flexible device right now, with EverythingStraps' full product range available immediately and battery life that outlasts both Fitbit Air and Whoop 5.0.

Either way, EverythingStraps has you covered. Shop now, or pre-order the Fitbit Air adapter below.