# Smart Hand vs Polygraph AI

The clearest difference is in-app purchases: Polygraph AI at none against Smart Hand's 2. Polygraph AI also leads on update cadence (every 2 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Smart Hand sells 2 in-app purchases, starting at $3.99 per 7 days. Polygraph AI asks for nothing beyond the download.

Smart Hand ships an update weekly, Polygraph AI every 2 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Smart Hand | Polygraph AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/smart-hand-sign-master/id6768349013/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 186 MB | 31 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Minh Tri Nguyen](https://appshunter.io/developer/1857251131) | [Andres Saiz Ruiperez](https://appshunter.io/developer/6781788677) |

## What reviewers say

### Smart Hand

[App page](https://appshunter.io/ios/app/smart-hand-sign-master/id6768349013)

Transform your hand movements into interactive visual magic with real-time hand tracking. Control glowing particles, trigger visual reactions with gestures, and create animated scenes. Experience futuristic hand interactions and satisfying motion-based effects.

**Highlights:** Real-time hand and finger tracking, Interactive 3D particle effects, Gesture and hand sign recognition, Dynamic particle morphing, Creative card creator, Smooth camera interaction

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $3.99 | per 7 days |
| Yearly Premium | $19.99 | per year |


### Polygraph AI

[App page](https://appshunter.io/ios/app/polygraph-ai-lie-analysis/id6796011746)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Hand free?

Smart Hand is free to download, with in-app purchases available.

### Is Polygraph AI free?

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

### Do Smart Hand or Polygraph AI have ads?

Both Smart Hand and Polygraph AI show ads.

### Which is updated more often, Smart Hand or Polygraph AI?

Smart Hand ships an update weekly, and Polygraph AI every 2 days. Most recently, Smart Hand was updated on October 25, 2026 and Polygraph AI on October 25, 2026.

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