Finish Your Workout.
Your AI Coach Takes It From Here.
No new apps. No manual logging. Connect your Strava account, and VibeWriter's AI automatically evaluates every workout, generates creative titles, tracks your goals, and summarizes your training — without you lifting a finger.
How It Works
Connect Strava
One click, ten seconds. Authorize VibeWriter to read your activities and you're done.
Train Like Normal
Use Strava, Garmin, your watch — whatever you already use. Nothing changes about your routine.
AI Does the Rest
Within seconds of finishing, your AI coach evaluates your workout, writes a title, and updates your training summary.
Everything Happens Automatically
AI Workout Evaluations
Finish a workout on Strava, and within seconds your AI coach analyzes your pacing, effort, and intervals — then posts detailed feedback right to your Strava activity description.
Creative Activity Titles
Boring "Morning Run" titles get automatically replaced with AI-generated titles that capture the vibe. Customize the tone with your own prompt, or let the AI surprise you.
Weekly Training Summaries
Every week, your AI coach synthesizes all your workouts into a training summary — volume, patterns, and progress. Like having a coach review your training log.
Goal Tracking
Tell the AI what you're training for — a marathon, a faster 5K, getting back in shape — and it weaves goal progress into every evaluation and summary.
Native iOS App
Check in on your training anywhere. The iOS app gives you your AI training summary, weekly stats, goals, and activity history — all synced automatically.
See What Your AI Coach Says
Strong negative split today. Your last 2 miles averaged 7:12/mi vs 7:45/mi in the first half — that's the kind of back-end speed that wins races.
HR stayed controlled through mile 4 before drifting up, which is exactly what you'd want in a tempo effort. Lactate threshold work like this is key for your April half marathon goal.
One thing to watch: your cadence dropped below 170 in miles 3-4. Try to keep it consistent — it'll help with efficiency as the distance increases.
What's New
VibeWriter ships often. Here's what landed recently.
AI evaluations and titles now recognize sauna and sauna + cold-plunge sessions from device temperature, instead of mislabeling them as workouts or junk volume.
Your activities are now titled for what they actually were — "3×1mi Threshold @ 6:45", "8mi Easy + Strides", "Hilly Trail Run, 2,400ft" — instead of only a creative one-liner. This is built from your AI workout evaluation, so the title reflects the real session, and it stays in sync: regenerate an evaluation (for example after adding context) and the title updates with it automatically. Descriptive is the new default for everyone. Prefer the dad jokes? Your custom prompt is untouched — just switch Title Style to **Creative** in Settings → AI Titles and you're back, now with one upgrade: creative titles finally get workout context, so a treadmill run won't get called a lakeside loop. Note: Descriptive titles need workout evaluations turned on — with evaluations off, choose Creative.
Your AI coach now treats the ultra-running knowledge base as the source of truth for any number or protocol it gives you — fueling (carbs/hr), paces, zones, weekly volume, taper, heat acclimation, and the like. Before this, on a multi-part question like "how should I race this?" it could ground the pacing in real methodology but answer the fueling from a generic guess — sometimes landing well below what the knowledge base actually supports for a hard, long effort. Now it consults the knowledge base for each part of the answer and won't state a performance number it didn't look up. It also holds its ground: if you push back, it re-checks the methodology and either explains why it stands or revises with the specific reason it changed — instead of instantly folding and walking the number around. And you'll now see a "Consulted knowledge base" chip beneath the coach's replies whenever it looked something up — a quiet, muted one if a lookup found nothing or failed — so it's clear when guidance is grounded. The same grounding now applies to AI workout evaluations.
Your Data, Your Control
We only access what's needed to coach you — your activity data. Evaluations are generated per-workout and posted directly to your Strava activity. We never store personal information beyond what Strava provides, and your data is never used to train AI models. Connect in seconds, disconnect anytime.