# Lie Detector by the Expression vs Ghost Vision SLS

The clearest difference is review sentiment: Lie Detector by the Expression at 91% against Ghost Vision SLS's 48%. Lie Detector by the Expression also leads on device support (3 vs 1) and iOS requirement (11.0 vs 18.0). Ghost Vision SLS's advantage is rating (4.6 vs 4.2) and ratings volume (355 vs 60). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Lie Detector by the Expression sells 1 one-off in-app purchase and Ghost Vision SLS sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Ghost Vision SLS holds the better App Store score, 4.6 against 4.2. That said, the two scores are not equally well evidenced: Ghost Vision SLS has 355 ratings behind it against 60, so its average is the more settled of the two. Written reviews complicate that: 91% of Lie Detector by the Expression's written reviews are positive against 48% of Ghost Vision SLS's, so the app with the better star average is not the one people write more warmly about.

Lie Detector by the Expression ships an update every 3 months, Ghost Vision SLS every 4 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Lie Detector by the Expression | Ghost Vision SLS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (60 ratings)](https://appshunter.io/ios/app/lie-detector-by-the-expression/id1418456153/reviews) | **[4.6 (355 ratings)](https://appshunter.io/ios/app/ghost-vision-sls/id1595033309/reviews)** |
| Number of ratings | 60 | **355** |
| Positive reviews | **91.3% of reviews** | 48.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 40 MB | 176 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Jorge Gregorio Martin Bello](https://appshunter.io/developer/567988393) | [Michael Weber](https://appshunter.io/developer/349078052) |

## What reviewers say

### Lie Detector by the Expression

[App page](https://appshunter.io/ios/app/lie-detector-by-the-expression/id1418456153)

This app analyzes facial expressions in real-time to detect potential deception. It tracks eye movements, lips, and face shape, comparing them against nine expressions commonly associated with lying, based on psychological studies. Record a subject's face while asking questions to receive an instant 'Lie' or 'True' result.

**Highlights:** Real-time facial tracking, Analyzes eye movement, lips, and face shape, Detects nine common deception expressions, Based on psychological studies, Instant lie or truth results, Record video for analysis

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited time | $1.99 | one-time |


### Ghost Vision SLS

[App page](https://appshunter.io/ios/app/ghost-vision-sls/id1595033309)

This app uses advanced AI and lidar-enabled infrared imaging to detect human figures and provide unparalleled night vision. It offers 3D visualization, real-time alerts, and the ability to record and share findings, enhancing paranormal investigations.

**Highlights:** AI-driven infrared imaging, Real-time human figure detection, 3D visualization and analysis, Night vision in total darkness, Record and share findings, Lidar-enabled functionality (iPhone Pro)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access Subscription | $1.99 | per month |
| Lifetime Full Access | $11.95 | one-time |

**What reviewers like**

- 💡 Innovative LiDAR feature
- 👍 Great value for money (paid version)
- 👻 Fun and exciting experience
- ✅ Accurate representation (for some users)
- 🌟 Better than other ghost apps

**What reviewers complain about**

- 💰 Expensive paywall for features
- 💸 App takes money but gives nothing
- 👎 Fake SLS camera accusations
- 🚫 No free trial for full features
- 📉 Battery drain reported

**Reported bugs**

- Recorded files corrupted (no video/audio)
- Bug with turning LiDAR on/off in landscape orientation
- App freezes and not functioning
- Paid features not unlocking after payment
- App does not open after payment

**Requested features**

- Allow trial for paid features
- Add 4K recording
- Offer different color options for LiDAR depth and joints
- Option to save visible color video and LiDAR depth separately
- Repair corrupted video feature


## Frequently asked questions

### Is Lie Detector by the Expression free?

Lie Detector by the Expression is free to download, with in-app purchases available.

### Is Ghost Vision SLS free?

Ghost Vision SLS is free to download, with in-app purchases available.

### Which has better reviews, Lie Detector by the Expression or Ghost Vision SLS?

Ghost Vision SLS is rated higher. Lie Detector by the Expression averages 4.2 out of 5 from 60 ratings, while Ghost Vision SLS averages 4.6 from 355 ratings.

### Do Lie Detector by the Expression or Ghost Vision SLS have ads?

Neither Lie Detector by the Expression nor Ghost Vision SLS shows ads.

### Which is updated more often, Lie Detector by the Expression or Ghost Vision SLS?

Lie Detector by the Expression ships an update every 3 months, and Ghost Vision SLS every 4 months. Most recently, Lie Detector by the Expression was updated on October 25, 2026 and Ghost Vision SLS on October 27, 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.*