Real-time voice coaching triggered by your heart rate. Science-backed protocols. No subscription — ever. Pay $9.99 at launch, yours forever.
30-day free trial · No credit card required
The Problem
WHOOP buzzes your wrist. Strava charts your distance. None of them have a real voice that responds to your heart rate — in real time — and tells you exactly what to do.
Most running apps track your distance and lock your own data behind a monthly paywall. They measure your runs. They don't improve your life.
Garmin gives away VO2 max coaching — but only to Garmin owners. Apple Watch is the #1 smartwatch globally, and those users have been left out. Until now.
WHOOP: $200/yr. Runna: $120/yr. TrainingPeaks: $135/yr. The average person already spends $133/month on subscriptions. You don't need another one.
A real voice coach that listens to your heart rate and guides every interval, in real time. One-time $29.99 — no subscription, no monthly bill, no hidden costs.
Key Features
Your personal coach guides every run. Live heart rate zone feedback, pacing cues, and interval prompts keep you in the optimal zone — triggered by your actual HR, not a timer.
When your heart rate crosses a zone boundary, your coach responds immediately. Push too hard in Zone 4? You'll hear it. Drop too low in Zone 2? You'll hear that too.
Optimal cadence (170–180 SPM) reduces injury risk and metabolic cost. VO2boost's metronome runs alongside your voice coach — no second app, no second screen.
Watch your VO2 max climb with clear analytics that connect your training to real health outcomes — cardiovascular age, healthspan trajectory, and weekly progress.
Not generic interval workouts. The exact methods published in peer-reviewed research and used by elite endurance coaches worldwide — fully explained and coached.
Complete access to every protocol, every coaching session, every analytics tool — for a single one-time payment. No subscription. No renewal. No regret.
Training Protocols
Named after the researchers who proved them. Coached by a real voice that keeps you honest on every interval.
The gold standard for maximum VO2 max adaptation. 4 × 4 min at 90–95% HRmax with 3-min active recovery.
Alternating 30-second bursts at VO2max and 30-second recovery. High reward, manageable fatigue.
High-density intervals for lactate threshold and VO2 ceiling. 13 reps of 30s work / 15s rest.
The low-and-slow aerobic base work Peter Attia calls the foundation of longevity. Sustained, conversational effort.
12-minute field test to establish your VO2 max baseline. Run once, know your starting point forever.
Race-pace work to translate fitness into performance. Sustained effort at lactate threshold pace.
Pricing
While competitors charge you every month, VO2boost is a one-time purchase. You break even vs. Strava in 3 months — then pay nothing forever.
| App | Type | Cost |
|---|---|---|
| WHOOP | Subscription | $200 / yr |
| Runna | Subscription | $120 / yr |
| TrainingPeaks | Subscription | $135 / yr |
| Garmin Connect+ | Subscription | $70 / yr |
| VO2boost | One-time | $9.99 launch ONCE |
Early Feedback
"Finally an app that actually talks me through Norwegian 4x4. The voice coach calling out my HR zones mid-interval is a game changer. I don't have to look at my watch at all."
"I cancelled WHOOP and Strava the same week I installed this. $200 a year gone. VO2boost does what both of those promised to do — actually coaching me, not just measuring me."
"The built-in metronome running alongside the voice coach is the detail I didn't know I needed. My cadence went from 155 to 172 SPM in two weeks without even thinking about it."