Precision training.Built to adapt.
Generic plans count flat kilometers and ignore the climb. Prysm rebuilds your plan around your vert, your terrain, and how you recover. After every run.
The week you actually had
No week ever goes to plan.
You miss Tuesday's tempo. A static plan pretends nothing happened — and the debt piles onto your long trail weekend. Prysm rebuilds the week around what actually happened.
- The missed tempo is simply gone
- Two hard days still stacked
- 22 km of trail on cold legs
The engine
Every run reshapes the next.
The loop runs after every session — not once a season. That's what separates an engine from a PDF.
You run
The session flows in from Strava, Apple Health or Polar. You rate the effort in one tap.
The engine reads what changed
LivePerceived effort, heart-rate variability, sleep — the raw reads from every session fuse into one readiness verdict.
Your week recalculates
Upcoming sessions are re-sized, moved or swapped — before fatigue turns into injury.
Adapting is not improvising
Every change passes the same physiology rules as the original plan. Your block stays coherent — it just matches reality.
- Weekly volume is capped — no incoherent jumps
- Deload weeks are enforced, not optional
- Your race taper is protected — hard sessions can't creep in
- Every session keeps a precise role in your block
The coach
Your coach doesn't just talk.
It acts.
Coach Prysm reads your fatigue, proposes concrete changes, and rewrites your plan — in one tap.
- Reads fatigue from your Load Ratio, how hard sessions felt, and recovery
- Proposes concrete changes — not vague advice
- Applies to your real plan in one tap
Built for the days that don't go to plan.
The session
Open. Run. Done.
No vague “run 45 minutes.” Every session opens as a precise structure — warm-up, climbs, recoveries, cool-down — each block carrying its own pace or effort target, built from your real fitness and the terrain.
Rolling Threshold
10.4 km · 620 D+ · 58 min
Your paces, not a chart's
CalibratedEvery range is recalibrated from your real runs. On the climbs, targets switch to effort and grade — never a pace you can't hold. As your fitness climbs, they tighten — automatically.
Six intents, one color code
Every block carries an intent — so you always know why you're running, not just how far.
The signals
Numbers that make decisions.
Prysm doesn't chart your data for decoration. Every signal has a threshold — cross it and your plan changes. You read a decision, not a graph.
Readiness
Today
Primed to push
↑ RisingSignals
Rough night→today's session eases itself.
Load Ratio
Acute ÷ chronic · 7 vs 28d
Acute
42
7-day load
Chronic
38
avg · 28d
Ratio
1.12
acute ÷ chron
Above 1.3→intensity steps down before injury risk climbs.
Consistency
This week · to date
6 / 7 sessions
Avg session quality87/100
A sustained drift→the plan trims volume, it doesn't just turn red.
Race day
Know what you're building toward.
Every week has its place in the block — base, build, peak, taper. You see where you are, what's left to climb, and the finish time it's building you toward.
Build
week 7/14Base
4w ✓
Build
4w
Peak
3w
Taper
3w
Projected finish · Trail 35K
3:42 – 3:55
You arrive rested at the line. Your taper eases the final weeks back on its own — nothing to manage in the home stretch.
The app
Your whole plan, in your pocket.
Open the app for today's session — paces, climbs and vert. Rate each run in a tap, and the coach reshapes your week — all from your phone.
Garmin, COROS, Suunto — coming soon
Pricing
14 days of Pro. Then Free, automatically.
- Running & trail plan
- 14-day preview for a new target every 30 days
- 1 AI plan personalization per month
- 5 coach messages per month
- 4 weeks of history
Then Free automatically
- Everything in Free
- Full running & trail calendar
- Automatic readjustment after missed sessions
- Performance predictions
- 4 AI plan personalizations per month
- 30 coach messages per month
- Unlimited history
- Everything in Basic
- Unlimited AI plan personalizations and coach messages
- Multisport: cycling and strength training
- Cross-training coordination
- Full session details with AI analysis
Cancel anytime. Upgrade or downgrade whenever you want.
Frequently asked questions
Everything you need to know before you start.
The engine redistributes your week: the key session moves to a realistic slot, volume and vert rebalance, and hard days keep their spacing. You never "catch up" by stacking climbs onto tired legs.
Train with a plan that plans back.
Setup takes three minutes. Try Pro for 14 days with no card, then continue on Free automatically.
Start your 14-day Pro trialFree plan · No card · 3-min setup