Which data does Trimetra read from your watch?
You connect your watch. You see "connected". And three weeks later your step goal is still on zero. What comes out of a connection, and what does it depend on when something does not?
Three reasons something does not come through
A connection usually tells you one thing: connected or not connected. What comes out of it is a second question. And "does not come from here" can mean three things, each with a different fix.
One: the connection offers it, and Trimetra does not read it yet. Your watch measures it and your connection passes it on. It is waiting on our side. Adding a second connection changes nothing here.
Two: the connection does not offer it. Your device may measure it perfectly well, but it does not come out along this route. That says something about the connection and nothing about your device. A band can count steps while its connection offers steps nowhere. Then it is the road in between.
Three: it cannot be checked. Not every manufacturer publishes its documentation. In that case "we do not know" is the most honest answer there is, and that is not the same as no.
The table below keeps those three apart, per brand and per kind.
What comes through per brand
Six kinds of data, because Trimetra works with those six: your workouts, your steps, your sleep, your resting heart rate, your HRV and your weight. If one stays empty, a goal or a card in the app stays empty. So for these six you want to know in advance where you stand.
The table is about what comes out of a connection once it is running. Whether you can start a connection today is a different question. That one lives on the connections page.
| Brand | Workouts | Steps | Sleep | Resting heart rate | HRV | Weight |
|---|---|---|---|---|---|---|
| Apple Health | Comes through | Comes through | Comes through | Comes through | Comes through — with a caveat | Comes through |
| COROS | Comes through | Not yet | Comes through | Comes through | Comes through | Unknown — with a caveat |
| Hammerhead | Comes through | Not via this connection | Not via this connection | Not via this connection — with a caveat | Not via this connection | Not via this connection — with a caveat |
| Health Connect | Comes through | Comes through | Comes through | Comes through | Comes through — with a caveat | Comes through |
| Polar | Comes through | Comes through | Comes through | Comes through — with a caveat | Comes through | Comes through — with a caveat |
| Strava | Comes through | Not via this connection | Not via this connection | Not via this connection | Not via this connection | Not via this connection |
| Suunto | Comes through | Comes through | Comes through — with a caveat | Not via this connection | Comes through | Not via this connection |
| Wahoo | Comes through | Not via this connection | Not via this connection | Not via this connection | Not via this connection | Comes through — with a caveat |
| WHOOP | Comes through | Not via this connection — with a caveat | Comes through | Comes through | Comes through | Comes through |
| Withings | Not yet | Not yet — with a caveat | Comes through | Comes through — with a caveat | Comes through — with a caveat | Comes through |
What the four answers mean
- Comes through — Trimetra pulls this from the connection and uses it. Do check the caveats below: with some brands it depends on which device you own.
- Not yet — this connection offers it, and Trimetra does not read it yet. There is nothing wrong with your device and nothing wrong with your connection. Adding a second source will not change this cell.
- Not via this connection — the connection does not pass this on. That says something about what is available along that route, and nothing about what your device can do. A watch can measure something perfectly well while the connection offers it nowhere.
- Unknown — we could not check, because this manufacturer’s documentation is not public. In that case we would rather say we do not know than guess.
- An asterisk after a sign means there is a caveat with it. Those are listed below.
Caveats to the table
One cell per brand cannot carry everything. For these combinations the answer depends on your device, or there is something to add.
- Apple Health · HRV — Apple passes HRV on as SDNN. Most watches show RMSSD, which is a different measure — the numbers do not compare one to one.
- COROS · Weight — COROS documentation is not publicly viewable, so we cannot point to where this would live. What COROS publishes itself mentions a weight as a profile field; we will not claim it any harder than that.
- Hammerhead · Resting heart rate — This field does exist in the Karoo connection, but only to send something to it. There is no way to read it back out.
- Hammerhead · Weight — This field does exist in the Karoo connection, but only to send something to it. There is no way to read it back out.
- Health Connect · HRV — Health Connect passes on whatever your watch or app puts into it. If your device does not put this in, it stays empty in Trimetra too.
- Polar · Resting heart rate — Polar sends a resting heart rate as a profile value from your watch settings, not as a daily measurement. Trimetra uses it to suggest your thresholds; it does not show up as a daily figure in your overview.
- Polar · Weight — Polar states how it knows your weight. If you stepped on a scale, it arrives as a weigh-in in your weight overview. If you typed it into Polar yourself, it fills your weight at Trimetra only while that is still empty. If Polar estimated it, it does not come through at all.
- Suunto · Sleep — Suunto contradicts itself here: their FAQ says sleep does not come through the connection yet, while their developer page documents a fully worked-out sleep message. Trimetra reads sleep. This caveat is here because the source contradicts itself.
- Wahoo · Weight — This is a single weight from your Wahoo profile, without a date and without history — not a series of weigh-ins you could read a trend from.
- WHOOP · Steps — Your band does count your steps. WHOOP’s connection does not make them available anywhere, so they do not come through. That is not the same as a band that cannot count.
- Withings · Steps — According to Withings’ own device list, this is on the trackers and on none of the scales.
- Withings · Resting heart rate — This is your heart rate at the moment you measure, from a blood pressure monitor or a ScanWatch — not a resting value across a whole day. A scale on its own does not provide it.
- Withings · HRV — According to Withings’ own device list, only the ScanWatch 2 measures this. If you have a scale or another Withings device, nothing comes through here.
This table comes from the same register as the connection screen in the app, so it can never say something different here than it does there. What comes through per brand was checked against each manufacturer’s documentation.
Why a brand name is not enough
A brand is not a device. One name often covers a watch, a scale, a chest strap and sometimes a sleep mat. Those do not measure the same things. A table with only brand names is soon too coarse.
Withings shows that most clearly. According to Withings’ own device list, only the ScanWatch 2 measures heart rate variability. Steps are on the trackers and on none of the scales. So "Withings provides HRV" holds for one device, and not for the scale most people picture.
That is why there is a list of caveats under the table. It is not small print. It is the part you need if you still have to decide what to buy.
Watch the shape of what comes in as well. A weight can be a series of weigh-ins you can read a trend from, or a single number from your profile without a date. A resting heart rate can be a daily measurement or a fixed value from your watch settings. HRV arrives as RMSSD or as SDNN, and you cannot put those two side by side. In the table they carry the same word. In the caveats you find the difference.
What "not yet" means
For a few brands there is an open circle: not yet. That means: the connection offers this, and Trimetra does not read it yet.
It has its own sign, because for you it means something different from a cross. There is nothing wrong with your device and nothing wrong with your connection. It is waiting on our side.
That saves you looking. If your brand has a circle for steps, a second connection will not get you further. If it has a cross, another source will.
There is no date for when such a cell flips over. A date you cannot make hard is a promise, and that does not belong in a table you need to be able to build on.
What Trimetra does with this
The table on this page comes from the same register as the connection screen in the app. There is no second list that anyone maintains by hand. If what the app reads changes, this page changes with it.
In the app you see per connection what comes out and what does not, in the same words as here. If something you need for a goal is missing, the app names the other connection that does pass it on. For steps those are Apple Health and Health Connect.
You can use two sources side by side. Plenty of people take their workouts from one platform and their daily figures from another. That is the ordinary way to fill an empty cell.
You do not need a connection to start. Trimetra can record on its own, and what you enter by hand counts just as heavily as what comes off a watch.
Frequently asked questions
Does Trimetra read my steps from Strava?
No. Strava collects workouts and is not a watch connection: there are no daily steps, sleep or HRV in it. If you want steps, add Apple Health or Health Connect. Those sit on your phone and do pass them on.
Why is my step goal on zero while my watch is connected?
Usually that connection passes on your workouts but no daily steps. Look up your brand in the table above. If there is no check mark in the steps column, that is your explanation. A second source fixes it as soon as that source passes steps on.
Does my WHOOP band not count steps?
Your band does count them. They do not make it through the connection: WHOOP does not expose steps there. That is a limit of the connection and not of your band.
I have a Withings scale. Do I also get HRV and resting heart rate?
No. According to Withings’ own device list only the ScanWatch 2 measures heart rate variability. The heart rate a scale or blood pressure monitor sends along is your pulse at the moment of measuring, not a resting value across the day. Your weight and your sleep do come through.
Can I connect my Garmin?
Not at the moment. Garmin removed the application form for new connections and is not reviewing new applications. There is no date for when that reopens. Other apps do show Garmin data: they had their access before that door closed. You can bring your Garmin workouts in through Strava, and your daily figures through Apple Health or Health Connect.
Why does COROS say "unknown"?
Because the COROS developer documentation is not public. We cannot check whether something is offered. So we mark it unknown, instead of writing a guess down as a fact.
Should I switch on several connections at once?
You can, and it is often the simplest fix: one source for your workouts and one for your daily figures. Trimetra keeps duplicate measurements apart, so the same workout does not land twice.
Trimetra tells you per connection what comes out and what does not, in the same words as on this page. If something is missing, the app names the connection that does pass it on. You can try everything for fourteen days; recording and collecting stay free after that.