Your AI coach calls every set in real time, scans any gym to adapt your split, and tracks exactly where you are from first rep to last.
Knurl — Intelligent Strength Coach
Train smarter. Get stronger.
Knurl is the workout tracker built around a coaching engine that actually knows your training. Log your lifts, follow your program, and get coaching grounded in what you've actually done — not generic advice.
A Coach With Your Real Numbers
The coach sees every set, weight, and rep from your last seven sessions. Ask why you're stalling on bench, whether your volume is high enough, or what you should do next. It reasons from your history, not a template.
Evidence-Based Programming
Every response is built on proven training science — progressive overload, rep ranges by goal, RPE and RIR, volume guidelines, plateau diagnosis, and deload protocols. No fluff.
Compete Against Real Lifters
Four live leaderboards — Volume, Consistency, Cardio, and Strength — updated weekly. See exactly where you rank against every other Knurl user. Your row stays visible no matter how far down the pack you are.
Gym Scanner
Point your camera at the gym floor and Knurl builds a workout template from the equipment it sees. Traveling or at an unfamiliar gym? You're still covered.
Full Workout Tracking
Log sets, weights, and reps. Built-in rest timer with notifications. Template plan visible on every exercise card during your session so you always know what the program calls for. Post-workout summary with volume, duration, and any PRs you hit.
Form Videos Built In
Every exercise has a technique demo pulled from YouTube, Vimeo, Bodybuilding.com, or MuscleWiki. Tap Form on any exercise mid-workout to watch it.
Progress That Makes Sense
Track your estimated 1-rep max and max weight over time on a shared scale. Log bodyweight and see the trend. Personal records tracked automatically.
Works Offline
Log workouts anywhere, with or without a signal. Sets sync automatically when you reconnect.
Ratings & Reviews
5.0
out of 5
4 Ratings
What’s New
• Smarter first sets — starting a new exercise for the first time now shows an estimated weight to start with, based on your history with similar lifts
• Total vs. per-side weight entry — log barbell, EZ bar, trap bar, and Smith machine lifts either as total weight or plates-per-side (with an editable bar weight) — no more mental math for exercises you track per side
• Fixed: the exercise search sheet no longer gets stuck behind the keyboard when adding an exercise mid-workout
• Fixed: starting a workout could occasionally fail silently with no feedback — you’ll now see a clear message if it doesn’t go through
Version 1.33
The developer, Knurl LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
Health & Fitness
Contact Info
User Content
Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Location
Usage Data
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Knurl LLC
Size
11.4 MB
Category
Health & Fitness
Compatibility
Requires iOS 15.0 or later.
iPhone Requires iOS 15.0 or later.
iPad Requires iPadOS 15.0 or later.
iPod touch Requires iOS 15.0 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.