Fitbit Air vs Amazfit Helio Strap (2026): Two $99 Screenless Trackers, One Winner?

At $99.99 each with no subscription, the Fitbit Air and Amazfit Helio Strap are the two cheapest serious screenless trackers you can buy, and they solve opposite problems. Google built a lighter-than-air health monitor for everyone. Amazfit built a budget training strap for people who sweat on purpose, then put it on the arms of HYROX athletes.

Same money, different lives. Here is how to tell which one belongs on yours.

Disclosure: Fitcoin is our product. We are not affiliated with Whoop, Google, Fitbit, Garmin, Amazfit, Xiaomi, Polar, Oura, Ultrahuman, RingConn, Hume Health, Bionny or any other hardware brand named here. We do not sell trackers and we do not take affiliate commission from either side of this comparison, so we have no reason to nudge you toward the more expensive box. Where Fitcoin appears, it is as the rewards and insights app that reads the data these trackers write to Apple Health or Health Connect. Scores described below are wellness estimates for general fitness, not medical advice.

Fitbit Air vs Helio Strap at a glance

Who each one was built for

The Air's spec sheet reads like a GP's wish list: continuous heart rate, heart rhythm monitoring with AFib alerts, SpO2, temperature, proper sleep staging. It weighs 12 grams and hides under a sleeve. Its workout software is basic, auto-detection plus phone GPS, and Google knows it; the product is aimed at the enormous market of people who want health awareness, not training plans.

The Helio Strap reads like a coach's wish list on a budget: dependable exercise heart rate from the upper arm, exertion scores after sessions, BioCharge energy that behaves like a readiness metric, and sleep tracking to close the loop. What it lacks is the Air's medical-adjacent extras; there are no AFib alerts here.

The placement advantage

One physical fact drives this comparison: optical heart rate from the wrist degrades when you grip, brace or flex, exactly what happens under a barbell or on a ski erg. The upper arm suffers far less. Reviewers rate the Helio Strap's BioTracker readings as excellent for the price, and for interval or strength training it will routinely out-track wearables costing four times as much.

For 24/7 background monitoring the difference shrinks to nothing, and the Air's sensor suite is broader. So the rule of thumb: the harder your sessions, the more the strap's placement pays; the more passive your tracking, the more the Air's extra sensors pay.

Zepp vs Google Health

Google Health is cleaner and calmer; Zepp is denser and busier but surfaces more training detail free of charge. Both export where it matters: Apple Health and Health Connect, which means both feed apps like Fitcoin, turning the same effort into FitScore, partner rewards and Leagues. If you want that layer on top of the Air specifically, our Fitbit Air rewards guide walks through it.

Verdict: which one should you buy?

Choose Fitbit Air if:

• You want all-round health tracking with AFib alerts and proper sleep staging.
• Comfort and invisibility beat training depth.
• You or your family will act on cardiac safety features.

Choose Amazfit Helio Strap if:

• You train hard enough that wrist heart rate visibly glitches.
• You want recovery and exertion scores without any subscription.
• Eleven days of battery and a gym-first design suit your week.

Our take: this is the easiest verdict in the cluster. Sedentary-to-active buyers should take the Air; genuinely training buyers should take the strap. At $99 you can even justify both jobs with one honest question: when did you last do a workout hard enough to break a wrist sensor's signal?

Frequently asked questions

Fitbit Air or Amazfit Helio Strap at the same price?

Pick by purpose. Both cost $99.99 with no required subscription. The Air is the better all-round health tracker: lighter, AFib alerts, cleaner app. The Helio Strap is the better training tool: upper-arm heart rate accuracy, BioCharge readiness, exertion scoring and a HYROX-flavoured feature set.

Which has better battery life?

The Helio Strap, at around 11 days of typical use against about 7 for the Fitbit Air. Neither number is a problem in practice; both charge quickly.

Is arm placement better than wrist for heart rate?

During strength work, carries and burpee-style movement, yes. Wrist optical sensors lose signal when you grip hard; the upper arm holds a cleaner reading, which is why arm straps are standard among HYROX and CrossFit athletes.

Do these trackers work with other apps?

Yes. The Air writes to Google Health and Health Connect; the Helio Strap syncs through Zepp to Apple Health and Health Connect. Either can feed reward and insight apps like Fitcoin.

Is there a Helio Strap Pro?

Yes, a $199.99 two-sensor kit adding a waist-worn pod for muscular load analysis, aimed at serious hybrid athletes. For most people comparing against the Fitbit Air, the standard $99.99 strap is the relevant model.

Method and sources: Written 18 August 2026 from vendor spec sheets and press material, plus hands-on coverage from DC Rainmaker, PCMag, Tom's Guide, ZDNET, Wareable and Trusted Reviews published between May and August 2026. Prices are US list at publication and change often, especially promotional bundles. Battery figures are manufacturer claims unless a reviewer measured otherwise. We do not sell or take commission on any tracker named here; Fitcoin mentions are ownership-disclosed. Wellness estimates only, not medical advice.

Related reading: Whoop vs Amazfit Helio Strap, Garmin CIRQA vs Helio Strap, Helio Strap vs Xiaomi Smart Band 10, Whoop vs Fitbit Air, our Fitbit Air rewards guide

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About the author: Harris Khan is the co-founder of Fitcoin. He studied at Loughborough University and has more than 15 years of personal experience across strength training, bodybuilding, Muay Thai and general fitness.