# AI Lie Detector vs Simple Motion

The clearest difference is price: AI Lie Detector at Free against Simple Motion's $2.99. AI Lie Detector also leads on ratings volume (44 vs 1) and iOS requirement (15.0 vs 26.0). Simple Motion's advantage is rating (5.0 vs 4.3) and in-app purchases (none vs 17). On ads and device support there is nothing between them.

AI Lie Detector is free to download; Simple Motion costs $2.99 up front. AI Lie Detector sells 17 in-app purchases, starting at $3.49 per 7 days. Simple Motion asks for nothing beyond the download.

Simple Motion holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: AI Lie Detector has 44 ratings behind it against 1, so its average is the more settled of the two.

AI Lie Detector ships an update every 5 weeks, Simple Motion every 8 days. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | AI Lie Detector | Simple Motion |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.3 (44 ratings)](https://appshunter.io/ios/app/ai-lie-detector-truth-test/id6502961125/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/simple-motion/id6760897792/reviews)** |
| Number of ratings | **44** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 8 days** |
| Monetization | Freemium | **Free** |
| Size | 37 MB | 4 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Firat Caliskan](https://appshunter.io/developer/1731312726) | [Duncan Pollock](https://appshunter.io/developer/1886679285) |

## What reviewers say

### AI Lie Detector

[App page](https://appshunter.io/ios/app/ai-lie-detector-truth-test/id6502961125)

This entertainment app uses AI to analyze photos and generate playful, surprising results for fun. Upload images or use your camera to see entertaining interpretations of facial cues, perfect for sharing with friends and sparking laughter. It's designed purely for amusement and does not offer scientific lie detection.

**Highlights:** Image-based AI analysis, Playful and surprising results, Shareable with friends, Magic 8 Ball feature, Sound effects, Flashlight and screen light tools

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

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.49 | per 7 days |
| Weekly | $3.99 | per 7 days |
| Weekly | $4.99 | per 7 days |
| Lie Detector Premium Weekly | $6.99 | per 7 days |
| Lie Detector Premium Weekly | $6.99 | per 7 days |
| Lie Detector Premium Weekly | $7.99 | per 7 days |
| Lie Detector Premium Weekly | $7.99 | per 7 days |
| Lie Detector Premium Weekly | $8.99 | per 7 days |
| Lie Detector Premium Weekly | $8.99 | per 7 days |
| Monthly | $9.99 | per month |
| Monthly | $11.99 | per month |
| Yearly | $19.99 | per year |
| Yearly | $29.99 | per year |
| Lie Detector Premium Yearly | $49.99 | per year |
| Lie Detector Premium Yearly | $49.99 | per year |
| Lifetime Premium | $59.99 | one-time |
| Lifetime Premium | $99.99 | one-time |


### Simple Motion

[App page](https://appshunter.io/ios/app/simple-motion/id6760897792)

Create hand-drawn animations with a focus on traditional animation techniques. Features include a drawing canvas, timeline, onion skinning, and multiple layer types for various animation styles. Ideal for learning and creating animations on mobile devices.

**Highlights:** Hand-drawn animation tools, Onion skinning for frame-by-frame animation, Timeline with frame manipulation, Multiple layer types (drawing, stop motion, video, audio), Apple Pencil support with pressure and tilt, Shape recognition and paint fill, Reference image/video pinning

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AI Lie Detector free?

AI Lie Detector is free to download, with in-app purchases available.

### Is Simple Motion free?

Simple Motion costs $2.99, with no in-app purchases.

### Which has better reviews, AI Lie Detector or Simple Motion?

Simple Motion is rated higher. AI Lie Detector averages 4.3 out of 5 from 44 ratings, while Simple Motion averages 5.0 from 1 ratings.

### Do AI Lie Detector or Simple Motion have ads?

Neither AI Lie Detector nor Simple Motion shows ads.

### Which is updated more often, AI Lie Detector or Simple Motion?

AI Lie Detector ships an update every 5 weeks, and Simple Motion every 8 days. Most recently, AI Lie Detector was updated on October 24, 2026 and Simple Motion on October 15, 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.*