# Motion Snapshot vs J

The clearest difference is in-app purchases: J at none against Motion Snapshot's 1. J also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 5 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Motion Snapshot sells 1 in-app purchase, starting at $1.99 per month. J asks for nothing beyond the download.

Motion Snapshot ships an update every 5 weeks, J every 2 weeks. The most recent releases landed on October 16, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Motion Snapshot | J |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/motion-snapshot/id6738301692/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Ad-supported | — |
| Size | 28 MB | 3 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [takeshi ogawa](https://appshunter.io/developer/1676749157) | [Akinori Kanazawa](https://appshunter.io/developer/1876560461) |

## What reviewers say

### Motion Snapshot

[App page](https://appshunter.io/ios/app/motion-snapshot/id6738301692)

This app automatically extracts people from videos to create motion trail visualizations of their paths. It's ideal for analyzing sports form, dance choreography, or rehabilitation movements. It also supports tracking non-human objects like sports balls.

**Highlights:** Motion trail visualization, Automatic person extraction, Whole area analysis for objects, Customizable frame interval and opacity, No registration or usage limits

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly No Ads Plan | $1.99 | per month |


### J

[App page](https://appshunter.io/ios/app/j-kinetics/id6782524300)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Motion Snapshot free?

Motion Snapshot is free to download, with in-app purchases available.

### Is J free?

J is free to download, with no in-app purchases.

### Do Motion Snapshot or J have ads?

Motion Snapshot shows ads; J does not.

### Which is updated more often, Motion Snapshot or J?

Motion Snapshot ships an update every 5 weeks, and J every 2 weeks. Most recently, Motion Snapshot was updated on October 16, 2026 and J on October 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*