A vs J
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
A
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Simple motion capture utilizing the Apple Vision framework. It performs human body pose estimation and saves the resulting skeletal diagram video (MP4) to the Photos Library. From a security and privacy standpoint, raw camera images are not saved.
J
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撮影した写真または動画を選択すると、骨格推定されたメディアが新しく保存されます。 関節角度も表示され、跳躍力、床半力の可視化にも対応しています。 精度については無保証となります。
Screenshots
Verdict
The clearest difference is update cadence: A at every 5 days against J's every 2 weeks. J's advantage is iOS requirement (17.0 vs 26.4). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
A ships an update every 5 days, J every 2 weeks. Both last shipped on October 31, 2026.
| Parameter | A | J |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.4 | 17.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Mitsuhiko Fuda | Akinori Kanazawa |
In-app purchases
A
No in-app purchases
J
No in-app purchases
