MOVINdow
Sports video analysis on iPhone — frame-by-frame, side-by-side, in sync
MOVINdow is a free sports video analysis app for iPhone, iPad, and Mac. Compare videos side by side in sync, with no preset limit (within your device's memory), step through the action frame by frame from 1/1000 of a second, zoom into details while the video plays, and overlay every phase of a movement with stroboscopic motion trails. Built for coaches and athletes. Works fully offline — no login, no ads.
Analysis tools
- Side-by-side comparison, in sync — as many videos as you need at once: different angles, different sessions, or you vs. a reference. Simultaneous play, pause, fast-forward, rewind.
- Frame-by-frame from 1/1000 second — advance and rewind multiple videos together to find the exact moment: release point, contact, take-off, edge change.
- Zoom, move, rotate during playback — pinch into the grip, the footwork, the racket face — while everything keeps playing in sync. 2D, 3D and 360° rotation.
- Motion Trails — overlay the phases of a swing or jump into one stroboscopic-style video. Ghost keeps things that move; Clone cuts out the athlete. Learn more
- Fragment analysis (patented) — split the frame into independent zones that keep playing: isolate and enlarge the hands, the hips, and the feet at the same time. Learn more
- Prep tools — trim from 1/100s, crop (incl. face-detection auto-crop), semi-transparent overlay for form comparison, screen recording to share your analysis.
By sport
- Baseball / softball — swing path, release point, pitch phases side by side.
- Golf — swing planes from face-on and down-the-line, in sync; motion-trail the full swing.
- Tennis — serve toss, contact point, footwork frame by frame.
- Football (soccer), rugby, American football — tactics from multiple angles, tackle and kick technique.
- Ski / snowboard — line, edging and body position across runs; compare today vs. last week.
- Track & field — long jump phases, sprint form, take-off timing with motion trails.
- Swimming, gymnastics, figure skating, dance, martial arts, motorsports — any movement, any angle, all in sync.
FAQ
- What's a good free app to compare two videos side by side?
- MOVINdow — play 2 or more videos (no preset limit, within device memory) in sync on iPhone, iPad, or Mac, free.
- Can I watch two videos at once and slow them down together?
- Yes. Playback speed and frame-stepping apply across videos simultaneously, down to 1/1000 second.
- Do I need internet?
- No — MOVINdow works fully offline. Processing is on-device, and MOVINdow itself does not upload your videos.
- Is it really free?
- Yes, currently all features are free, with no login and no ads. Sample videos included.