# Lie Detector vs Lie Detector Test

The clearest difference is rating: Lie Detector Test at 3.4 against Lie Detector's 2.7. Lie Detector Test also leads on in-app purchases (none vs 4) and review sentiment (36% vs 14%). Lie Detector's advantage is update cadence (every 8 months vs every 42 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Lie Detector sells 4 one-off in-app purchases. Lie Detector Test asks for nothing beyond the download.

Lie Detector Test holds the better App Store score, 3.4 against 2.7. That said, the two scores are not equally well evidenced: Lie Detector Test has 1.6K ratings behind it against 30, so its average is the more settled of the two. Written reviews point the same way: 14% of Lie Detector's written reviews are positive against 36% of Lie Detector Test's.

Lie Detector ships an update every 8 months, Lie Detector Test every 42 months. Both last shipped on October 21, 2026.

## The numbers

| Metric | Lie Detector | Lie Detector Test |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (30 ratings)](https://appshunter.io/ios/app/lie-detector-truth-test-scan/id807454884/reviews) | **[3.4 (1.6K ratings)](https://appshunter.io/ios/app/lie-detector-test-simulator/id1219798065/reviews)** |
| Number of ratings | 30 | **1.6K** |
| Positive reviews | 13.8% of reviews | **36.5% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 8 months** | Every 42 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 88 MB | 22 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iDevver Apps Limited](https://appshunter.io/developer/453983205) | [Denis Batishchev](https://appshunter.io/developer/1179896396) |

## What reviewers say

### Lie Detector

[App page](https://appshunter.io/ios/app/lie-detector-truth-test-scan/id807454884)

This app simulates lie detection using fingerprint, voice, and camera scanning for entertainment purposes. It's designed for pranks and novelty, offering a fun way to playfully question truthfulness.

**Highlights:** Fingerprint scanner simulation, Voice scanner simulation, Camera scanner simulation, Entertainment and novelty purposes, Prank functionality

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Fingerprint Analysis Mode | $0.99 | one-time |
| Unlock Camera Analysis Mode | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |
| Ultimate Spy Pack | $2.99 | one-time |


### Lie Detector Test

[App page](https://appshunter.io/ios/app/lie-detector-test-simulator/id1219798065)

Simulate a lie detector test using your fingerprint. Fool your friends with this fun prank app that analyzes a "scan" of their finger to determine if they are telling the truth or lying. Perfect for lighthearted entertainment.

**Highlights:** Fingerprint scanner simulation, Prank mode to fool friends, Fake lie/truth results, Laser Xray effect, Random result generation

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Fun to prank friends
- 😯 Surprisingly accurate at times
- 🤩 Amazing programming

**What reviewers complain about**

- 🐛 Inconsistent results
- 💩 Completely fake/inaccurate
- 🤬 Too many ads
- 😡 Always says 'true'

**Reported bugs**

- Incorrectly identifies true statements as lies
- Freezes after each use

**Requested features**

- More realistic lie detection
- Option to change language


## Frequently asked questions

### Is Lie Detector free?

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

### Is Lie Detector Test free?

Lie Detector Test is free to download, with no in-app purchases.

### Which has better reviews, Lie Detector or Lie Detector Test?

Lie Detector Test is rated higher. Lie Detector averages 2.7 out of 5 from 30 ratings, while Lie Detector Test averages 3.4 from 1.6K ratings.

### Do Lie Detector or Lie Detector Test have ads?

Both Lie Detector and Lie Detector Test show ads.

### Which is updated more often, Lie Detector or Lie Detector Test?

Lie Detector ships an update every 8 months, and Lie Detector Test every 42 months. Most recently, Lie Detector was updated on October 21, 2026 and Lie Detector Test on October 21, 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.*