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Crux
FR

Coming soon to iOS & Android

Climb. Log.
Progress.

Your sends, your finger-strength sessions, how your fingers feel — so you progress without getting hurt. No ads, ever.

Get the app See how it works

Free tier forever · Optional Crux Plus · French and US grades

How it works

Four gestures, no friction.

The logbook and the coach — in the same app, no account, no hidden subscription.

  1. Log your sends

    Timer, type (boulder / route), grade — in three taps. French or US grading, your call.

  2. Follow a guided plan

    Finger strength, endurance, warm-up — each exercise has its timer and its description.

  3. Track how you feel

    Fatigue and finger condition after each session. Early injury signals show up in the data.

  4. See your progression

    Sends per grade, weekly trends, your next step. Always local, never shared.

Before · After

What actually changes.

Keeping a paper logbook is the chore half of climbers give up on after two months. Crux does the work for you.

Today, without Crux

  • Your sends end up in an iPhone note, then get lost when you switch phones.
  • You repeat the same grades because you don't have a progression plan.
  • You don't know if your fingers are better or worse — until something snaps.
  • You can't tell if you're climbing harder than three months ago.

With Crux

  • A chronological log of every session, kept local on your phone.
  • Guided finger-strength and endurance sessions, with per-exercise timers.
  • Finger condition noted after every session — an early warning you can act on.
  • Your progression by grade and by week, ready every Sunday evening.

Features

Three pillars, one logbook.

No half-finished features. We'd rather cover three needs well than ten poorly.

Sessions

The digital log of your sends, to the tap.

  • Per-send timer, boulder or route
  • French (6a, 7b+) or US (V5, 5.12a) grading
  • Full history, filterable by period

Workouts

Guided plans — finger strength, endurance, warm-up.

  • Per-exercise timer with structured rest
  • Session library (Pan Güllich, hangboard, ARC)
  • Post-session tracking: fatigue and finger condition

Progression

Your stats, your trend, your next step — every week.

  • Sends per grade and volume per week
  • Custom reminder if you haven't climbed in N days
  • No ads, no tracking — account optional

From your first boulder to your personal record.

Whatever your level, your gym or your discipline — it all fits in the logbook.

Pricing

Free for the community. Plus for the coach.

Logbook, workouts, stats, sync: all of Crux is free, forever. Crux Plus adds the AI coach — and funds the rest.

Free

€0 forever

  • Unlimited send logbook
  • Unlimited workouts, library included
  • Full stats and progression
  • Multi-device sync (free account)
At launch

Crux Plus

€3.99 / month

  • AI coach: rest or green light, explained
  • Generated training plans
  • Boulder photos backed up in the cloud
  • Early access to new features

Data hosted in Europe, never sold, never used to train AI.

FAQ

The questions we get.

If yours isn't here, write us at crux.app.support@gmail.com.

What is Crux, in one sentence?

A climbing session log with guided workouts for finger strength and endurance. Local, no account required, no ads.

Is it free?

Logbook, workouts, stats, sync: everything is free, forever. Crux Plus, the optional subscription, adds the AI coach (rest or green light based on your load and fingers), generated plans, and cloud backup of your photos.

Where is my data stored?

On your phone first. Cloud sync is optional and free (with an account) — without it, nothing leaves your device. No analytics, no ads, ever.

Are iOS and Android supported?

Yes, both — from the public launch.

Which grading systems are supported?

French (boulder 3a → 9c, route 3 → 9c) and US (V0 → V17, 5.6 → 5.15d). Pick one in Preferences — everything converts automatically.

When does it launch?

The app is in final testing with a hand-picked group of climbers. As soon as it feels solid, it lands on the App Store and Google Play.

Launch

Soon in your pocket.

Crux is in final testing with a hand-picked group of climbers. As soon as it feels solid, it launches publicly on both stores.

Coming soon App Store Coming soon Google Play

A question in the meantime? crux.app.support@gmail.com