Invert Eye

Invert Eye is a video-analysis tool built for gymnastics coaches, for the moment on the floor when a gymnast asks "what did I do wrong?"

Film the skill on your phone or iPad. Step through it frame by frame. Draw the shape, the angle, the line you want on the frame itself. Record your voice over the top, and hand the finished clip to the gymnast to take away.

It is the same thing a good coach has always done with a whiteboard, done with the actual footage.

FOOTAGE NEVER LEAVES YOUR DEVICE Invert Eye stores a reference to the clip in your own photo library, not a copy. Nothing is uploaded. There is no cloud library of children's video, because that is a liability rather than a feature.

WHAT IT DOES • Frame-by-frame scrubbing, with a frame counter, at any speed you like • Draw on the frame — lines, angles and shapes that stay put as you step forward • Record a voice-over and export the clip with your explanation on it • Compare two clips side by side, to show last month against today • Works entirely offline, on the gym floor, with no signal

FREE, AND ACTUALLY FREE Every one of those features works with no account, no sign up and nothing to buy. There is no trial and no paywall. The free version keeps nothing between sessions — it is a tool, not a filing cabinet.

FOR CLUBS Gymnastics clubs can connect their coaches' devices to their own gymnast roster, so clips can be filed against a named gymnast and kept as a library the club owns. Clubs interested in that should get in touch; it is not sold inside the app.

CONSENT IS ENFORCED, NOT ASSUMED For club-connected devices, video consent is checked against the club's own records before a clip can be attached to any gymnast. A parent's "no" cannot be overridden by a coach, by club staff, or by us. If consent cannot be checked at all, the app refuses anyway — a consent check that guesses "yes" is not a consent check.

Made in New South Wales, Australia, by someone who runs a gymnastics club and got tired of explaining a giant with his hands.