Try it

Counts your reps,
while you just train

Prop up your phone and start the exercise. Mantis sees the movement, counts reps out loud and keeps your workout history on its own. No buttons between sets.

Get the subscription See how it works
Mantis screen: pose check before the set begins
Step into frame — counting starts on its own
Mantis screen: reps counted in real time, 8 of 12
8 of 12 — progress you can see mid-set
Mantis screen: exercise catalogue with ticks
Tick the exercises — the workout builds itself

HOW IT WORKS

Three steps between “phone propped up” and “workout recorded”

  1. Build your workout

    Tick exercises in the catalogue or start from one of your own. Reps and sets are typed in, not tapped up one plus at a time.

  2. Prop up your phone

    Mantis checks that you are in frame and starts the set by itself. Everything runs on the device — the video never leaves it.

  3. Train

    Reps are counted out loud, rest runs on a timer, and the result lands in your history and extends your day streak.

FEATURES

Everything you normally have to do by hand

CAMERA COUNTING

Your phone sees the set and counts for you

Counting works for every exercise in the catalogue: presses, rows, swings, squats, bodyweight moves. Set progress shows on screen as a lime bar, and the spoken count keeps your tempo when looking down is awkward.

  1. Auto-start from your pose, no tapping
  2. Switch between the front and rear camera mid-set
  3. Fix the count by hand if the camera missed a rep
Mantis screen: set progress bar and camera rep count
Mantis screen: workout builder with muscle group filters

BUILDER

Your own workouts, no limits

Filters by muscle group, search by name, ticks right in the list. Save as many of your own workouts as you like, reorder exercises and change reps before you start.

  • Free-form and sequential
  • Timed rest
  • Duplicate in one tap

DAY STREAK

14 days

Your streak grows with every recorded workout and shows on the home screen. Missing a day does not reset it instantly — you get one day of slack.

HISTORY

Every workout saves itself

Date, exercises, reps and time. Come back to any workout and repeat it without building it again.

WIDGET

Streak and start from the home screen

The widget shows your current streak and launches your last workout in one tap, skipping the app.

SUBSCRIPTION

Two plans. Both count reps with the camera

Starter

Rep counting and your own workouts

$6.99 / mo

$59.99 when billed yearly

  • Real-time camera rep counting for every exercise in the catalogue
  • Workout builder and an unlimited number of your own workouts
  • Workout history, day streak and a home screen widget
Choose Starter
MOST POPULAR

Pro

Form, stats and a voice coach

$12.99 / mo

$109.99 when billed yearly

  • Everything in Starter
  • Advanced stats and per-exercise progress
  • Voice coach and form demonstrations
  • Early access to new exercises
Choose Pro

Billed through the App Store. The subscription renews automatically and is cancelled in your Apple ID settings. The first 7 days are free for new users.

Mantis app icon

Your next workout will record itself

Download Mantis and try rep counting on your very first set.

Start free