Koma – Frame by Frame Video
Video analysis for dance & sports

Too fast to follow?
Watch it frame
by frame.

Koma is an iPhone & iPad video player built for studying dance choreography and sports form. Open any video from your library and break it down with frame stepping, slow motion, mirroring and side-by-side comparison.

Download on theApp Store — Free iPhone & iPad · No sign-up
  • Frame by frame
  • Slow motion from 0.1x
  • Mirror video
  • Side-by-side
  • A-B repeat
  • Jog wheel
Sound familiar?

You paused the video,
and still missed the move.

Regular video players aren't made for learning choreography or checking your form.

The moves are too fast

You replay the chorus again and again and still can't catch the hand movement.

→ Slow it down to 0.1x and step frame by frame

Left and right are flipped

Dancing along facing the screen means mirroring every move in your head.

→ Mirror the video and copy it as you see it

Hard to see what's off

Watching your video and the reference separately makes it hard to compare.

→ Play both side by side, perfectly in sync

Features

Everything you need to learn a routine or fix your form

All the ways you watch while you practice, in one app.

Frame-by-frame stepping

Pause and move one frame forward or back to catch the exact moment.

Jog wheel & ruler

No more tapping a button over and over. Turn the dial or drag the ruler to step frames without covering the video.

Slow motion (0.1x–3x)

Presets plus fine-tuning for any speed you like. Premium unlocks 0.01x to 50x.

Mirror video

Flip the picture left to right so you can dance along facing the same way.

Side-by-side comparison

Play two videos together and step them frame by frame in sync. Speed and repeat are set per video.

A-B repeat

Loop just the part you're working on and drill that 8-count until it clicks.

Return point

Drop a flag and jump back to it with one tap, even while the video is playing.

Pinch to zoom

Zoom in on hands, feet or posture. Each video zooms independently in comparison mode.

Hold to change speed

Press and hold to play faster or slower, then let go to return to your speed.

Screenshots

Take a look

Player screen with frame-by-frame controls
Frame by frame
Instructor and your own video side by side
Side by side
Mirrored video playback
Mirror
Slow motion, zoom and feature overview
Slow & zoom
How to

Three simple steps

  1. Pick a video

    Choose any dance or practice video from your photo library. No account needed.

  2. Slow it down

    Watch the whole routine slowly, then step frame by frame through the tricky moments.

  3. Mirror and compare

    Mirror the reference to dance along, then put your video next to it to spot the differences.

Use cases

Great for practicing

Dance & K-pop covers

Learn choreography, cover dances and audition routines. Catch every detail of the chorus.

Golf, baseball & tennis

Film your swing or pitch, slow it down, and compare it with a pro's form.

Coaches & teams

Walk students through their videos frame by frame to point out exactly what to fix.

Pricing

Free, with every core feature

Want no ads and finer speed control? Premium is a one-time purchase.

Free

$0
  • Frame stepping, jog wheel & ruler
  • Slow motion (0.1x–3x)
  • Mirror & side-by-side
  • A-B repeat, return point & zoom

👑 Premium

One-time (not a subscription)
  • No ads
  • Speeds from 0.01x to 50x
  • Picture in Picture (keep watching while using other apps)
  • Everything in Free
FAQ

FAQ

Is Koma free?

Yes. Frame stepping, slow motion, mirroring, side-by-side comparison and the other core features are free. Premium, a one-time purchase, removes ads.

Which videos can I open?

Any video saved in the Photos app on your iPhone or iPad, including videos you filmed and dance videos you saved.

Where are my videos stored?

Selected videos are copied only to your device and never uploaded. The app keeps the 10 most recent videos and removes older ones automatically.

How do I remove ads?

Purchase Premium (one-time) from the crown button in the app. Ads disappear, and speeds from 0.01x to 50x and Picture in Picture are unlocked.

I purchased but Premium isn't active

Tap “Restore Purchases” on the Premium screen.

There's no sound

Check the device volume. The app plays audio even when the silent switch is on. In comparison mode the second video starts muted (toggle it with the speaker button).

The screen doesn't rotate

By design, the app ignores device rotation. Use the rotate button at the top right to switch between portrait and landscape.

Is there an Android version?

Not yet. Koma is currently available for iPhone and iPad.

Start your next practice frame by frame.

Free to download. No sign-up required.

Download on theApp Store — Free