# CoachAid - Review & Teach

> Slow-mo review & comparison

Canonical page: [https://chrome-stats.com/d/id6772896981](https://chrome-stats.com/d/id6772896981)

## Overview

- **ID:** `id6772896981`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** 伟杰 金
- **Category:** Sports
- **Version:** 1.4
- **Last updated:** 2026-06-24
- **First published:** 2026-06-10
- **Size:** 14 MB
- **Data as of:** 2026-09-18
- **Store listing:** [Apple App Store](https://apps.apple.com/cz/app/coachaid-review-teach/id6772896981)
- **Privacy policy:** [https://jinweijie.github.io/coachaid-site/privacy.html](https://jinweijie.github.io/coachaid-site/privacy.html)

## Description

Import or record clips, scrub frame-by-frame, draw and add text, compare side-by-side or transparent overlay, ball speed calculate. One-time purchase, no ads, no tricks.

CoachAid helps coaches and athletes review performance video on iPhone and iPad. It is a simple,
powerful, and completely private tool built to just work - one-time purchase, no subscriptions, no
ads.

RECORD OR IMPORT
Capture practice straight from the camera, or import existing videos from your photo library. Even
large videos come in with clear progress so you always know what is happening.

ORGANIZE YOUR LIBRARY
Keep source videos, trimmed clips, and saved comparisons together in one place. Tag anything, search
your whole library in seconds, and favorite the clips you use most.

ANALYZE WITH PRECISION
Scrub frame by frame, slow footage down to 0.1x, speed it up to 16x, and step one frame at a time to
catch the exact moment. Draw freehand, lines, arrows, rectangles, and circles, and add text directly
on the video to explain technique. Crop, zoom, and rotate to focus on what matters most.

MEASURE BALL SPEED
Use the built-in Ball Speed Calculator to mark start and end points on a clip and estimate speed for
tennis serves, baseball pitches, or custom distances. Save the measured result back onto the video
as an annotation for easy review and sharing.

COMPARE TWO CLIPS
Study two clips side by side, top and bottom, or in a transparent overlay so you can line up form
and timing frame by frame. Each clip keeps its own playback speed and scrub control.

EXPORT & SHARE
Save annotated snapshots and export comparison snapshots or videos when you are ready to share
feedback with an athlete or team.

PRIVATE BY DESIGN
Your library stays entirely on your device. No account, no sign-up, nothing uploaded.

Available in English, Simplified Chinese, Japanese, Korean, French, German, and Spanish.

Support: support@jinweijie.com
Privacy Policy: https://jinweijie.github.io/coachaid-site/privacy.html

## Rankings

- #2,044,226 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6772896981)