The Women’s Sleep & Heart Guide · Sponsored

8 Reasons Women Over 50 Whose Heart Races At Night Are Switching To A Bracelet

They traded the smartwatch for Tetra, a 12-gram bracelet that reads your nights, your heart, your stress and the direction your blood pressure takes, week after week. Here’s what made them switch.

A woman around 60 at her kitchen table in the morning, coffee in one hand and her phone in the other, wearing Tetra in Crystal Silver
Get My Tetra

Launch offer: $194.65 with SWITCH15, applied for you · 30-day money-back guarantee

It’s 3 a.m. Her heart is going like she just ran up the stairs. Her smartwatch is on the nightstand, charging. And at her last checkup, everything came back normal.

It isn’t in her head. Nobody has ever seen her other 364 days, not her doctor, not even her. And the watch on the charger has never seen one of her nights.

For a lot of the women who bought Tetra, the watch ended up in a drawer. A bracelet that looks like jewelry went on the wrist.

We read 155 answers from women who ordered Tetra: 61 of them brought up a watch, a ring or a band they’d had or didn’t want.

SMARTWATCHReason 01

A smartwatch was built for workouts and texts. Then they asked you to sleep in it.

A smartwatch charging on a nightstand at night while a woman sleeps in the background wearing Tetra in Carmine Rose Gold

A lot of women never quit their smartwatch. They just stop putting it on.

The women who switched told us why. Too bulky to dress up. Beeping at them to walk, to drink, to go to bed. Almost dead by evening, so it went on the charger right when the night began.

An Apple Watch is a very good phone for your wrist. But if yours charges overnight, your nights go unrecorded.

Tetra weighs 12 grams and has no screen. It stays on while you sleep. Nothing buzzes.

“My third Apple Watch died and I was tired of having a giant wristwatch.”

A Tetra customer, in our order survey

Per Apple, the Series 12 runs up to 24 hours on normal use, the SE 3 up to 18.

RINGS & BANDSReason 02

A ring is sized for the finger you had the day you ordered it.

A kitchen junk drawer with an old fitness band, a smart ring and tangled chargers, pushed shut by a hand wearing Tetra in Imperial Green Gold

Fingers swell. In the heat, at night, some mornings for no reason. A ring can’t adjust, so it comes off, and rings that come off at the gym end up missing.

Fitness bands go the other way: blocky, sporty, built for marathon training. Some grade your day, too. On a hard day, you don’t need a grade.

Then there’s the fee. Some smart rings charge about $6 a month on top of the ring to see all of your own data.

Tetra closes with a sliding clasp that adjusts in a second. The app is free for life. No subscription.

“I had an Oura ring but couldn’t wear it when my fingers swelled up”

A Tetra customer, in our order survey

About $6 a month is $216 over three years, for data that was yours to begin with.

CHECKUPSReason 03

Your checkup is one morning a year. You live the other 364.

A woman in her late fifties sitting in her parked car outside a medical office, her folded lab results on her lap

The labs come back normal. The advice is to keep an eye on it. She goes home still feeling off.

The doctor isn’t the problem. The calendar is. A checkup is one morning in a quiet office. A home cuff is one reading, sitting very still. Both matter.

But the 3 a.m. wake-ups and the wired afternoons happen in between, where nobody is looking.

And “it’s just age” explains everything and tells her nothing.

About half of American women 40 to 59 have high blood pressure, and about 7 in 10 at 60 and older (CDC, 2024). When it’s this common, one morning a year is a small window.

What you’ve already tried, side by side

Your optionsWhat it’s great forThe catch
Apple WatchTexts, workouts, the time, sleep when worn overnightMost models need a charge about every day. Notifications on your wrist.
Smart ringSleep, on your fingerOne fixed size. Some add about $6 a month.
Home cuffThe exact number on a given morningOne reading at a time
Annual checkupThe full picture: exam, labs, your doctor’s eyesOne morning a year
TetraYour weeks in between: nights, heart, stress, blood pressure trendFor the number itself, keep your cuff

YOUR NIGHTSReason 04

One reading is a snapshot. Your body is a film.

Seen over her shoulder, a woman on the edge of her bed in the morning reads her night on her phone, wearing Tetra in Crystal Silver

One number tells you where you were for one minute. A pattern tells you what’s going on.

Tetra reads your heart rate all day and all night: the lowest, the average and the highest. Your sleep in phases: deep, light and REM. A stress line across the day. Your oxygen level and your steps.

Each morning you read your night in the app with your coffee. After a few weeks, the short nights and the wired afternoons stop being a feeling and start looking like a pattern.

None of it was made up. It just never got written down.

More than 1 in 3 women 40 to 59 who are past menopause say they had trouble staying asleep at least four times in a week (CDC, 2017).

BLOOD PRESSUREReason 05

Keep your cuff for the number. Wear Tetra for the direction.

A home blood pressure cuff, a notebook and a coffee on the kitchen table, next to a forearm wearing Tetra in Imperial Green Gold

Here’s what you’ll see, so there are no surprises.

Your cuff gives you a reading: one number, on one morning. Tetra shows you which way your blood pressure is heading over the weeks, between two appointments. In the app, that’s a trend, week after week. For the number itself, you keep your cuff.

That trend is something you can show your doctor, next to your cuff readings. Your doctor still makes the calls. You just stop walking in empty-handed.

Asked what made them order, the women who bought Tetra put “My blood pressure” third, right after the look and understanding their body.

JEWELRYReason 06

It only works if you wear it. So it’s jewelry.

At dinner, a friend touches the Tetra bracelet in Carmine Rose Gold on a woman’s wrist

A tracker in a drawer tracks nothing.

Tetra looks like a bracelet because it is one: a stone-set bar on a tennis chain, in Crystal Silver, Carmine Rose Gold or Imperial Green Gold. Twelve grams, nickel free, with a sliding clasp.

People ask where you found your bracelet. Nobody guesses what it does.

So it’s on your wrist on the days that matter, and on the nights. That’s how your weeks add up into something you can read.

“people think it’s a pretty bracelet and are amazed when I show them it’s a fitness tracker”

A Tetra customer who already wears hers

We asked the women who bought Tetra what made them finally order. The most common answer: “It looks like jewelry.”

SIMPLEReason 07

Shower, pool, bed. It stays on.

A woman’s hand in her sixties resting on the wet edge of a pool, wearing Tetra in Crystal Silver

It stays on in the shower and the pool. For bed and the gym, there’s a second, soft band, free with your order: add it on the next page.

Nothing lights up in a meeting. Your data waits quietly in the app, on iPhone or Android, until you want to look.

One bracelet you don’t have to think about, day or night.

Rated 4.8 out of 5 · More than 100,000 Fitmo orders shipped worldwide

TRY ITReason 08

30 days to try it at home, with the launch offer.

A woman’s hand lifts Tetra in Crystal Silver out of its box, with the red soft band still inside

Tetra launched in August, and the launch offer is still on. It’s $229 instead of $279, and every button here applies SWITCH15 for you, so it comes to $194.65.

  1. Night 1Read your night in phases, deep, light and REM, the next morning with your coffee.
  2. Week 1Your resting heart rate and your stress start to show a pattern.
  3. Month 1Your trends take shape, ready to show your doctor.

You have 30 days to decide.

If it isn’t for you, our 30-day money-back guarantee covers you. Either way, your Tetra has a 2-year warranty.

30-day money-back guarantee

Where can I get Tetra with the launch offer?

Three women’s wrists side by side wearing Tetra in Carmine Rose Gold, Crystal Silver and Imperial Green Gold

Was $279Now $229

$194.65 with SWITCH15, applied when you click

  • SWITCH15 applied for you, nothing to type
  • A second, soft band for sleeping, free
  • Free shipping
  • 30-day money-back guarantee
  • Free app for life, no subscription
  • 2-year warranty
  1. Step 1: Click the button below.
  2. Step 2: Pick your finish: Crystal Silver, Carmine Rose Gold or Imperial Green Gold.
  3. Step 3: Tap “Add my free gift” to get your second, soft band.

“…the return policy made me order now worry free.”

A Tetra customer, in our order survey
Get My Tetra

Launch offer: $194.65 with SWITCH15 · 30-day money-back guarantee

Before you order

“It isn’t cheap. Is it really worth it?”

You pay once: $194.65 with the launch offer and SWITCH15. Over its 2-year warranty, that’s about 27 cents a day, with no monthly fee. And if it isn’t for you, you have 30 days and our money-back guarantee.

“Will it look like cheap costume jewelry?”

Its look is the first reason women told us they ordered. If it doesn’t look right on you in person, you have 30 days and our money-back guarantee.

“I already have an Apple Watch.”

Keep it for texts if you love it, and wear Tetra for your weeks. Or do what some women do: put your analog watch back on, with Tetra next to it.

“Does it track my blood pressure?”

It follows your blood pressure trends, week after week: the direction it’s heading between two appointments, something you can show your doctor. For an exact reading on a given morning, your cuff is still the right tool.

“How do I know it actually works?”

You’ll see it yourself. Night 1: your night in phases, the next morning. The first weeks: your heart and stress start to show a pattern. Around day 30: your trends take shape.

“I’m not sure about sleeping in a bracelet.”

It weighs 12 grams, and the free soft band is made for nights. It runs about five days between charges and recharges fully in about two hours.

“Is this legit? A lot of what I see online isn’t as nice as it looks.”

Fair question. Fitmo has more than 100,000 orders and a 4.8 out of 5 rating. Every Tetra has a 30-day money-back guarantee and a 2-year warranty.

Enough guessing.

Keep your cuff. Keep your doctor. And for the weeks in between, wear the bracelet that finally writes them down.

Get My Tetra

Launch offer: $194.65 with SWITCH15 · 30-day money-back guarantee

Was $279 Now $229$194.65 with SWITCH1530-day money-back guarantee

Get My Tetra

30-day money-back guarantee