Builds the program
Ask for a block and Harlen drafts a detailed, individualized program from that athlete’s physiology, then exports it straight to a spreadsheet.
Book a DemoFOR HIGH-TOUCH COACHES
The best coaches
don’t guess.
Harlen reads each client every morning against their own baseline and shows you exactly what changed. So you walk into every session knowing, not guessing.
Private beta. By invitation.
TALK TO YOUR DATA
Ask anything. In plain language.
Harlen has the whole picture of every client: wearables, check-ins, your notes, the full history. Ask it a question and it answers from all of it, cited to the data and the research. Type it, or just speak it.
YOU
Did Elena recover enough to add volume this week?
HARLEN
Not yet. Her restoration has sat 4–6% below her own baseline for three mornings, each after a short night, while load held steady. That reads as recovery debt, not adaptation. Hold volume through Thursday and recheck Monday.
2 studies · 14 days of dataAsk about any client…
Coaches ask things like“Who’s overreaching this week?”“Why has Elena plateaued?”“Is she ready to add volume?”“Who haven’t I heard from lately?”
Built for how coaches actually work.
Every feature points at the same thing: more depth per athlete, less time spent assembling it yourself.
Searches the science
Ask the research library any training question and Harlen pulls relevant peer-reviewed studies from PubMed. Save them, read them, or hand them to Harlen to apply to a specific client.
Cited, never guessed
Every answer is backed by peer-reviewed research with a near-zero hallucination rate, so you can stand behind every call you make.
Sees every signal
Full visualization of each client’s wearable data: recovery, sleep, HRV, load, and more. All read against their own baseline, in one place.
Notes that remember
Jot or speak a note right after a session. Harlen sorts what you said into events and durable facts and folds them into each client’s memory, so every future read gets sharper.
Tracks the body
Log body measurements like waist and arm alongside the wearable data, so progress shows up where it actually matters.
Connects everything
Wearables and apps, from Garmin, Oura, Apple, Polar, Coros, and Withings to MyFitnessPal. 500+ sources through Terra.
Reports clients can see
Harlen drafts progress reports and check-in messages you can hand straight to a client. Proof they’re improving, written in your voice.
WHAT OTHER SOFTWARE GETS WRONG
Built for women’s physiology, not just men’s.
Most analysis reads every athlete through a male baseline. So when a woman’s recovery markers swing across her cycle, HRV especially, the software flags it as chaos or overreaching.
It isn’t chaos. It’s a structured, hormonal rhythm. Harlen reads those markers in the context of the cycle, so normal monthly variation is understood, not mistaken for a problem. The calls you make for your female athletes are actually right.
HRV across one cycle~28 days
MenstrualFollicularOvulationLuteal
Better coaching is better business.
Going this deep used to mean carrying fewer clients. Because Harlen does the assembling, you can hold a full roster and still coach each person like they’re your only one.
Charge more
Back every decision with data and research your clients can see, then price like the specialist you are.
Retain longer
Show progress even on the plateau weeks, the moments clients usually quit. Proof keeps them.
Hold the edge
Offer a depth of attention per athlete that a coach without Harlen simply can’t match at scale.
THE DEVICES & APPS THEY ALREADY USE
Every signal, one connection.
Garmin, Oura, Coros, Polar, Withings, and Apple, plus apps like MyFitnessPal, all pulled into a single client model. No CSV exports, no blind spots between devices.
500+ sources through Terra. Every read cited to peer-reviewed research.
Three steps. Then you just coach.
No new dashboard to learn. No charts to interpret. Harlen does the reading so you can stay the coach.
Plug in their wearables
Connect Garmin, Oura, Apple, Coros, Polar, and Withings in one tap. Your client logs in once. You never see a CSV again.
Most clients connect in under two minutes.
Wake up to the brief
Each morning Harlen reads every client against their own baseline. You get a short brief in plain English, with the data underneath and the research it leans on.
Forty seconds to read. Twenty clients in ten minutes.
You make the call
Harlen never sends anything to your athlete. It hands you what changed, what it means, and a suggested move. You change the plan. You write the message.
No autopilot. The coach decides, every time.
PRIVATE BETA
See Harlen on your gym, before you pay.
We recommend a quick demo before you commit. Twenty minutes with a founder. We’ll show you exactly what Harlen looks like for a gym like yours. No client data needed.
$149/mo + $6 per client · first 10 clients free