FitSleeps vs HiStrips Onyx: How They Compare to Silent Wake

FitSleeps vs HiStrips Onyx

Short answer: they're near-identical products at near-identical prices, and the differences between them are smaller than the difference between buying any of them and buying one you can actually send back easily. On specs, HiStrips Onyx beats the $39.00 FitSleeps — FitSleeps' base model has only one fixed vibration intensity, where Onyx has three. Both are undercut on price by Silent Wake, at $37.99, which also gives you three.

But if you're comparing these two because you want a silent alarm that just works, you're one click from a third option that matches both on the specs that matter and beats them on the three that decide whether you actually end up happy: what it costs delivered, how fast it recharges, and how easy it is to change your mind.

Full disclosure: we make Silent Wake. Every competitor figure below comes from that brand's own website, checked 7 August 2026 and re-checked 13 August 2026, contradictions included. We've left in the places where they beat us.

The comparison

The one spec that separates FitSleeps from HiStrips

The $39.00 FitSleeps has a single, non-adjustable vibration intensity. For a device whose entire job is waking someone who doesn't wake easily, that's a real limitation — you habituate to a fixed stimulus over a few weeks, and there's nowhere to escalate to. To get three levels from FitSleeps you pay $84.00 (FitSleeps runs price experiments; we have also seen $49 to $89).

HiStrips Onyx gives you three at $39.95. So between those two, Onyx is the better buy and it isn't close.

Silent Wake also gives you three escalating levels, at $37.99 as listed 22 August 2026 — less than either of them — and unlike Onyx, there's no proprietary magnetic charging cable to lose, because the module slides out of the strap and plugs straight into any USB port.

If habituation is what brought you to this page, the escalation people ask about after intensity levels is a different stimulus altogether — an electric shock rather than a stronger buzz — and the Pavlok Shock Clock compared with vibration sets out what is and isn't known there, including that no published study puts electrical stimulation against vibration for waking sleepers.

What these actually cost, delivered

Of the three bands on this page, Silent Wake is the least expensive: $37.99, against $39.00 for the base FitSleeps and $39.95 for the HiStrips Onyx, all as listed on each brand's own site on 13 August 2026.

The delivered gap is wider than the sticker gap. HiStrips states on its own site that "Currently Free Shipping is Available on all orders above 45€/50$" — so a single Onyx at $39.95 sits under their own threshold and has postage added on top. We can't tell you how much, because they don't publish it. FitSleeps publishes no shipping terms at all, so you find out at checkout. Silent Wake ships free with no minimum spend, so for a US buyer the listed price is the delivered price.

And it's the cheapest here without giving anything up. Three escalating intensity levels, where the $39.00 FitSleeps has one fixed level. Two alarms set on the device itself — no app, no Bluetooth, nothing to pair at 6am. Up to 14 days per charge, and about 30 minutes to refill, with the module sliding out of the strap into any USB port where the Onyx wants a proprietary magnetic cable you can leave in a hotel room. And the 100-day money-back window runs from the day it arrives, not the day you order, which quietly gives you a week or two more than a policy timed from purchase.

Where that argument stops. The Onyx runs up to three alarms and we run two; if you need weekday, weekend and nap live at once, they do that and we don't. The $84.00 FitSleeps Pro does 20+ days per charge against our fourteen.

Now read the review numbers properly

This is where the comparison actually gets decided, and it's the part most people skim.

FitSleeps shows two different figures on two of its own pages. The standard product page says 4.8 from 51,837 reviews. The Pro page says 4.6 and "225,000+ customers." 51,837 reviews from 225,000 customers would be a 23% review rate — extraordinary for any consumer product. Neither number is auditable from outside.

HiStrips shows 1,829 reviews at 5.0 on the Onyx page and 1,838 on the Onyx Pro+ page, checked 12 August 2026. Two different products, two counts nine apart, moving together — that's a site-wide widget, not reviews of the thing you're buying. Their own Amazon listing also says 2 intensity levels, contradicting the 3 on their site.

As for us: we're a much newer store, and we'd rather not ask you to weigh one widget against another. Judge us on the things you can actually check from where you're sitting — the specs in the table, the shipping and returns terms written out in plain text below, and the product itself on the product page. Quantity you can't verify isn't evidence; it's decoration.

See it in action and check the current price →

What the spec tables leave out entirely

Every table on this page — including ours — hides the part of the purchase that actually goes wrong.

Where does it ship from, and how long does it take? Neither FitSleeps nor HiStrips publishes this. HiStrips publishes one line about shipping — free over 45€/50$ — and nothing about origin or transit time; FitSleeps publishes nothing at all. We do: 1–3 business days to process, then 3–10 days to the US and Canada, 7–10 to the UK and Europe. Shipping is free worldwide with no minimum spend, and we ship internationally.

What actually happens if you want to send it back? All four say "100 days." Ours runs 100 days from the date of delivery, not from the order date — which quietly gives you a week or two more than a policy timed from purchase. You email support@eivoi.com with your order number and we reply within 24 hours. Defective units get a free replacement, not an argument.

Who are you giving your card to? This is the honest core of it. FitSleeps and HiStrips are direct-to-consumer brands you'd be finding for the first time from a comparison page. So are we — we're not pretending otherwise. The difference is that you're already here, you can read our returns policy in one click, and you can see the price in your own currency. With the others, you're opening a new tab and starting that evaluation from zero.

That isn't a spec. It's the reason most of these comparisons end with someone buying nothing at all.

So, two practical points before you open that tab. Against the two products on this page, the concrete case for Silent Wake is three escalating intensity levels rather than the single fixed level of the $39.00 FitSleeps, at a lower price than either band, and a module that slides out into any USB port rather than the proprietary magnetic cable the Onyx uses — which is one more thing to leave behind in a hotel room. It is wrist-worn and vibration only, with no speaker at all, and runs up to 14 days per charge, with shipping free worldwide with no minimum spend and delivery internationally. And the 100-day money-back guarantee runs from the day it arrives rather than the day you order, which is the whole point: no spec sheet on this page can tell you whether the thing wakes you, so the only sensible way to find out is at our risk instead of yours.

And the thing nobody publishes

Not one brand here — us included — publishes the vibration motor's force rating. It's the one specification that would let you compare these bands on the thing that actually matters, and the entire category withholds it. Even published, it wouldn't tell you everything: research on tactile smoke alarms found that how reliably a vibration wakes someone also turns on age, alcohol, sleep stage and hearing status, and that a meaningful minority don't wake even at as-purchased intensity (Bruck & Thomas, Ear and Hearing, 2009; Thomas & Bruck, IAFSS, 2008). But it would let you set one device against another, and right now you can't do that at all.

Which means the spec sheet cannot answer your actual question. So buy the one with the strongest, clearest way out. That's the whole logic of a 100-day guarantee: it converts an unanswerable question into a refundable experiment.

Watch for the "0 dB" claim too — both FitSleeps Pro and HiStrips use it. 0 dB is the threshold of human hearing, not the absence of sound. We used to say it and removed it. The true and stronger claim, which applies to all of us: no speaker, no tone, nobody else in the room hears anything.

So which should you buy?

If you want the most straightforward version of this: Silent Wake. The lowest price on this page at $37.99, three escalating levels, two alarms set on the device, about two weeks per charge, and a 30-minute recharge with no cable — so a flat band costs you half an hour, not a lost morning. 100 days from delivery to change your mind, shipping free worldwide with no minimum spend, and a product page that shows it in action before you spend anything.

If you genuinely need a third alarm — weekday, weekend and nap all live at once — HiStrips Onyx does that and we don't. That's a real reason to pick them and we'd rather say it than hide it.

Don't buy the standard FitSleeps. One fixed intensity, and it isn't even the cheapest band on this page: $39.00 for one level against $37.99 for three.

Don't buy any wrist band if you're profoundly deaf. A bed shaker under the mattress is a far larger stimulus than anything worn on a wrist, ours included. We said that for a long time while selling no bed shaker; as of 8 August 2026 we do sell one, a $44.00 clock with a wired pad that goes under the pillow or mattress as listed 11 August 2026, so we now have a commercial interest in that advice and you should weigh it accordingly.

And if you both need waking — two people, one bed, different times — that is a different purchase from either of these, and what to buy when you both need waking compares what the whole market offers for it, including the fact that nobody sells a purpose-built pair.

Silent Wake — $37.99, and 100 days from the day it arrives

Three escalating intensity levels. Two alarms, set on the device, no app. About 14 days per charge and 30 minutes to refill — the module slides out into any USB port, so there's no cable to pack or lose. No speaker, no tone, nobody else hears it.

Shipping is free worldwide with no minimum spend — a single band qualifies. Ships internationally. If it doesn't wake you, email us and we refund it.

See the current price →

Common questions

Is the FitSleeps Pro worth $84.00?

Only if you specifically need the 20+ day battery, because the other thing the Pro buys you — three intensity levels instead of one — costs $37.99 at Silent Wake and $39.95 at HiStrips. Paying $84.00 to fix a limitation the base model shouldn't have had is a poor trade unless the battery is genuinely the deciding factor. If you travel for three weeks at a stretch with no USB port anywhere, the Pro makes sense. Otherwise you're paying more than twice over for adjustability that the cheaper competing bands include as standard.

Is a 20-day battery worth paying double for, or is 14 days enough?

For most people, 14 days is enough. It means charging roughly twice a month; a 20-day battery saves you perhaps six charges a year, and the Pro models want $40 or more for that. What matters far more than the headline figure is how long the recharge takes and what it needs, because the real failure mode is a flat band on a morning you can't miss. Silent Wake runs up to 14 days per charge and the module goes straight into any USB port, with nothing proprietary to find first.

Are these all the same device with different branding?

Nobody outside these companies can say for certain, and you should treat any confident answer with suspicion. What's visible is that the products share a form factor, a price band and a feature set, and that HiStrips lists 2 intensity levels on its own Amazon page against 3 on its site — the kind of inconsistency you get when a listing and a product drift apart. The practical response isn't to guess at factories but to buy from whichever seller you can actually reach afterwards, and to read the returns terms before you order.

Do these brands ship to the UK, Canada or Australia?

Neither of them says. FitSleeps publishes no shipping information at all, so you find out at checkout, and international buyers sometimes find out about duties later still. HiStrips publishes a single line — "Currently Free Shipping is Available on all orders above 45€/50$" (checked 13 August 2026) — which tells you that a single $39.95 Onyx falls under their own threshold and has postage added, and nothing whatever about which countries they reach or how long it takes. That absence is worth weighing, because a silent alarm is no use sitting in a customs queue. Silent Wake ships internationally, free worldwide with no minimum spend, taking 3–10 days to the US and Canada and 7–10 to the UK and Europe, and the 100 days to return it start from the day it arrives.

How much weight should the review counts on these sites carry?

Less than the size of the numbers suggests. Counts like these sit inside each seller's own widget — nobody outside the company can audit them, and FitSleeps' own two pages don't agree with each other. The numbers worth weighing are the ones a seller has to honour: the return window, who pays return postage, and whether there's a support address that answers. A 100-day money-back guarantee counted from delivery is the strongest of those, because it makes the purchase a refundable experiment regardless of what any widget says.

Which one should I buy if I share a bed?

Any of the three works, because none of them has a speaker — that's the one thing this product category does outright better than any bedside alarm. So decide on other grounds: intensity levels if you're the heavier sleeper of the two, alarm count if you both use one, and the return window if you're unsure either of you will tolerate wearing something overnight. If you both need waking at different times, that's a different purchase again — see two alarms, one bed. What you shouldn't do is try to solve it with a louder clock or a dawn lamp, since both fill the room and wake the person who didn't need waking.

Related reading

• The Best Vibrating Alarm Clock in 2026
• Two Alarms, One Bed: What to Buy When You Both Need Waking
• Every Wrist Vibration Alarm Compared
• FitSleeps Alternatives: What to Check Before You Buy
• DawnPulse vs Homedics WakeBand
• Pavlok Shock Clock vs Silent Wake
• Do Vibrating Alarms Actually Work?
• How to Wake Up Without Waking Your Partner

Competitor figures from fitsleeps.com and histrips.com, checked 7 August 2026, with all prices and HiStrips' shipping terms re-checked on each brand's own site on 13 August 2026 and the HiStrips review counts on 12 August 2026 — all subject to change, so verify before buying. We have not tested competitor products; this compares published specifications. Review counts are as displayed by each seller and are not independently audited. We sell one of the products compared here and said so at the top.