What happened. Why. What changes.

The layer above your training stack: it reads your plan, your wearables, your own check-in, your nutrition, the conditions and what you take, gives you one training decision a day in one of eight words, then reads how you ran and how the next morning looks. For runners and hybrid athletes — HYROX and DEKA included — who already have a plan and wear a watch or ring, on iPhone.

You can hand a general model whatever you paste in. Octane is built around your continuously connected timeline — your goals, your plan, your workouts, your wearables, your recovery, your nutrition, and what happened after each earlier recommendation. It reads that every morning without being asked, and every number on the screen comes from a deterministic engine, not a model.

Garmin is one of the best sources Octane has. It knows your run and, if the watch stays on, your night. It doesn't know your Runna plan, your ring, what you ate, how you said you feel, or that Sunday's long run is the one worth protecting. Octane reads Garmin in that context.

Keep it. Octane isn't asking you to throw away a plan that works. Paste the calendar link and Octane reads every session, matches what you ran to what was planned, and reads the morning after — without touching the plan.

Each understands one part of you: the plan, the run, the night. Octane is the reading across all of them, plus your check-in, what you ate and what you take — it never replaces them, and never writes anything back.

No — averaging is how a real signal disappears. Octane reads one source per measurement per day: the device worn overnight for sleep, HRV and resting rate; the one worn all day for steps and energy; the richest recording for the session. It names the one it read, and the others stay on the record. Which one it reads is a rule about what a device is for, never a verdict on which device is right.

No. One is the ordinary case and the whole product works on it. Reading one source per measurement is what stops a second device from making things worse — it is not a reason to buy one.

One decision before you train — TRAIN AS PLANNED, PROCEED WITH CAUTION, REDUCE INTENSITY, SHORTEN, RECOVERY DAY, REST DAY, SESSION COMPLETE or NO PLAN — with the sentence that names what sat outside your usual range. Under it, what is still outstanding before the start. Then a read of the session once it syncs, and a read of the next morning against your baseline.

No. Every label keeps the session or reduces it — never “train harder”. Backing off on a day that turned out fine costs one session; the opposite mistake costs a block.

A score summarises one device's view of one morning. Octane's decision is about a specific planned session: it knows tomorrow's long run is the one worth protecting, what you ate yesterday, how you said you feel, and what you've started taking. And when nothing was measured, it says that, rather than showing a number built on one input.

Not unless you ask for a season. Octane reads the plan you already have, from Runna's private calendar link, a coach's calendar link, or typed in. With Pro you can have Octane lay out a season around the events you name; the morning decision still only ever reduces what is on the calendar.

Not on its own. When a morning asks for less, Octane says what today's session should become — shorter, easier, or a recovery day — in the plan's own units. Moving a session is yours: any Octane session can be moved, skipped or restored from the plan, and a watch that receives Octane's sessions follows. Sessions from Runna or another plan are moved in their own app.

Each run and each station, from your lap presses or the step markers of a session Octane sent to your watch. Every station is read against your own earlier sims at the same load, and the late runs against the early ones — held, slowed or faded. It never ranks a station as a weakness and never says why.

The read says so — “Stopped at 2.8 mi of a planned 4.5 mi.” — reads what you did run rather than the plan, withholds the split and fade lines a stopped run can't have, and asks why you stopped, in your words. If you were advised to shorten, it reads as the recommendation working.

Tomorrow's long run is fuelled tonight. Octane knows the session is coming, so the Add sheet carries one line — “Tomorrow: Long Run • 16mi · 249 / 375 g carbs today” — and yesterday's intake is one of the seven rows behind today's decision.

No. Speech is turned into text on this phone. The recording never leaves it. “My normal breakfast” and “same as yesterday” are answered from your own log, with no model involved; anything else goes to the model as text and you check it before it is logged.

No. Octane records what you tell it you take — a name, an amount as you state it, and whether it was logged. It never recommends, calculates or adjusts a dose, and the line about your stack on Today is a count only.

A word — High, Moderate, Low — with the five inputs behind it listed, never a percentage. Insights use five words of their own, from Strong signal to Not enough data, each with the counts it rests on.

The decision, its label, its sentence, the Why rows and every number on the screen come from deterministic engines reading your own data. A model writes the morning brief and reads meal photos — and any text carrying a number Octane didn't supply is rejected. The providers are Anthropic and Google, under contract, and they don't train on your data.

Octane doesn't sell your data, doesn't use ad networks, and ships no third-party analytics SDK. A shared card has no field for weight, HRV, medications or location. You can delete your account and everything in it from Settings at any time. Health data has its own policy: the Consumer Health Data Privacy Policy.

Free collects — connections, logging, workout numbers, the decision and its buttons, the check-in. Pro interprets — the Why, the session read, the morning after, the brief, the Stack response, the season — at $14.99/mo or $99.99/yr with a 14-day free trial. Founding is $69.99/yr.

One of the first 500 people building Octane with us: TestFlight first, a Founding Athlete number in the app, and everything in Pro at the founding price — locked in for as long as you stay subscribed. When the seats are gone, they're gone.

No Android — Octane is iPhone only, iOS 18 and up. It's on the App Store now — free to download, with a 14-day Pro trial.

No. Octane is not medical advice. Recovery signals come from consumer wearables, not medical devices. Octane tells you when something wasn't measured rather than guessing.