# Lie Detector Test vs Lie / Truth Detector

The clearest difference is rating: Lie / Truth Detector at 4.0 against Lie Detector Test's 3.4. Lie / Truth Detector also leads on update cadence (monthly vs every 42 months). Lie Detector Test's advantage is in-app purchases (none vs 3) and ratings volume (1.6K vs 291). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Lie / Truth Detector sells 3 one-off in-app purchases. Lie Detector Test asks for nothing beyond the download.

Lie / Truth Detector holds the better App Store score, 4.0 against 3.4. That said, the two scores are not equally well evidenced: Lie Detector Test has 1.6K ratings behind it against 291, so its average is the more settled of the two. Written reviews point the same way: 36% of Lie Detector Test's written reviews are positive against 44% of Lie / Truth Detector's.

Lie Detector Test ships an update every 42 months, Lie / Truth Detector monthly. The most recent releases landed on September 25, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Lie Detector Test | Lie / Truth Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (1.6K ratings)](https://appshunter.io/ios/app/lie-detector-test-simulator/id1219798065/reviews) | **[4.0 (291 ratings)](https://appshunter.io/ios/app/lie-truth-detector-polygraph/id1558500142/reviews)** |
| Number of ratings | **1.6K** | 291 |
| Positive reviews | 36.5% of reviews | **44.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 42 months | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 22 MB | 120 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Denis Batishchev](https://appshunter.io/developer/1179896396) | [Luis Hernando Prada](https://appshunter.io/developer/1554735315) |

## What reviewers say

### 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


### Lie / Truth Detector

[App page](https://appshunter.io/ios/app/lie-truth-detector-polygraph/id1558500142)

Simulate a lie or truth detector with this fun app. Analyze what your friends and family say and see if the simulated polygraph detects truth or lies. Features fantastic graphics and effects for hours of entertainment.

**Highlights:** Simulates lie/truth detection, Polygraph simulation, Fantastic graphics, Engaging effects, Hours of fun

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove the ads | $2.99 | one-time |
| AI Detector | $3.99 | one-time |
| All features + no ads | $5.99 | one-time |


## Frequently asked questions

### Is Lie Detector Test free?

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

### Is Lie / Truth Detector free?

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

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

Lie / Truth Detector is rated higher. Lie Detector Test averages 3.4 out of 5 from 1.6K ratings, while Lie / Truth Detector averages 4.0 from 291 ratings.

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

Both Lie Detector Test and Lie / Truth Detector show ads.

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

Lie Detector Test ships an update every 42 months, and Lie / Truth Detector monthly. Most recently, Lie Detector Test was updated on September 25, 2026 and Lie / Truth Detector on September 14, 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.*