Now in private beta
The running coach
you've always needed.
Finally in your pocket.
Signal combines your training data, recovery metrics, and race calendar into one intelligent coach that knows exactly where you are — and exactly what it takes to get where you're going.
Works with Apple Watch · Garmin · Fitbit · Oura Ring · Strava
Good recovery today. Your HRV is trending up — a quality run is in order. Runna has 8mi on the schedule.
Sleep: 7h 20m with 1h 42m deep. REM slightly below baseline but recovery is solid overall.
Training: This is your third consecutive aerobic day. Effort should stay conversational — no hero miles today.
Weather: 58°F, clear. Good conditions.
Your aerobic efficiency is quietly improving. Three weeks ago, 9:04/mi cost you 146bpm — yesterday it cost 138bpm. That 8-beat drop at the same pace is a real fitness signal, not noise. Full zone 2 for all 6.2 miles. Keep stacking these easy efforts and your race ceiling rises with them.
Works seamlessly with
Today
Start every morning knowing exactly where you stand.
Every morning, Signal synthesizes your overnight recovery data — HRV, sleep quality, resting heart rate, sleep stages — into a single, clear picture of what today should look like for your training. No guessing. No generic advice.
The daily briefing covers sleep quality, training readiness, what's on your schedule, and the weather. Your TL;DR snapshot tells you in one sentence whether to push, hold back, or rest. Your body speaks. Signal translates.
Good recovery today. Your HRV is trending up — a quality run is in order. Runna has 8mi on the schedule.
Sleep: 7h 20m with 1h 42m deep. REM slightly below baseline but recovery is solid overall.
Training: This is your third consecutive aerobic day. Effort should stay conversational — no hero miles today.
Weather: 58°F, clear. Good conditions.
Your aerobic efficiency is quietly improving. Three weeks ago, 9:04/mi cost you 146bpm — yesterday it cost 138bpm. That 8-beat drop at the same pace is a real fitness signal, not noise. Full zone 2 for all 6.2 miles. Keep stacking these easy efforts and your race ceiling rises with them.
Activity
Every run you log deserves more than a number.
Signal reviews each run automatically — pace relative to heart rate, effort versus plan, what the data actually means for your fitness trajectory. Not just statistics. Coaching insights after every session, grounded in context.
A 9-minute mile means something very different at 135bpm than at 165bpm. Signal knows the difference, tracks your trends, and connects individual workouts to the bigger picture of race readiness. You'll always know if you're building or breaking down.
AI Coach
Ask anything.
Get a real answer.
Signal's AI Coach knows your full training history, your recovery data, your race goal, and your schedule. Not generic advice pulled from the internet — specific, personalized coaching based on your actual numbers.
Ask whether you're on track for a sub-1:50 half. Get a race fitness projection with real caveats. Ask what to prioritize this week. Get a concrete answer, not a hedge. Your coach is available at 2am when you're spiraling about taper week. It never tells you to "listen to your body."
Responses are generated from your actual training data
Log
Track everything that moves the needle.
Performance isn't just what happens on the road. Log strength sessions, nutrition, alcohol, and injuries directly in Signal. Every entry gives your coach the context to give you better advice.
HRV dropped overnight? If you logged two beers and a heavy squat session, Signal knows why — and accounts for it in your next briefing. Runners who log the full picture get coaching that reflects the full picture. Your life is part of your training.
Works with Signal
Signal connects to the tools you already use — automatically where possible, with a one-time setup where needed.
Every run triggers an automatic Signal review — pace vs. HR, effort vs. plan, race readiness impact. No manual logging.
Scheduled workouts, TSS targets, and coach-assigned plans synced directly into your daily briefing.
Signal reads your race events and key training dates directly from your calendar — no manual entry needed.
HRV, sleep stages, recovery score, and training load — pulled directly via device APIs into your daily briefing.
Who it's for
Signal isn't for everyone.
It's for you.
Signal is for the runner with a race on the calendar. The one who doesn't just log miles but wants to know what they mean. Who wakes up and wants a real answer to "should I push today?" — not a guess, not a vibe, not a generic training plan. If you take your goals seriously, Signal treats them that way.
From the blog
Training intel.
2026-05-01
Why Your Easy Runs Are Probably Too Hard
Most recreational runners spend nearly all their time in the wrong zone — too hard to recover from, too easy to adapt to. Here's what the data actually says.
2026-04-22
The Recovery Metric Elite Runners Check Every Morning
Heart rate variability isn't a fitness metric — it's a readiness metric. Here's what it's actually measuring, why it matters, and how to use it to train smarter.
2026-04-10
Are You Actually Ready for Race Day? Here's How to Tell
Race fitness isn't a gut feeling. There are real signals — in your training data, your recovery metrics, and your recent workouts — that tell you whether you're on track.
Get early access
Your next PR starts here.
Signal is in private beta. We're onboarding runners with a goal and a race on the calendar.