# Lie / Truth Detector vs Liar Catcher Detector

The clearest difference is update cadence: Lie / Truth Detector at monthly against Liar Catcher Detector's every 4 months. Lie / Truth Detector also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Lie / Truth Detector sells 3 one-off in-app purchases and Liar Catcher Detector sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Lie / Truth Detector ships an update monthly, Liar Catcher Detector every 4 months. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Lie / Truth Detector | Liar Catcher Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (306 ratings)](https://appshunter.io/ios/app/lie-truth-detector-polygraph/id1558500142/reviews)** | — |
| Number of ratings | **306** | — |
| Positive reviews | 44.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 120 MB | 7 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Luis Hernando Prada](https://appshunter.io/developer/1554735315) | [Maria Bayas](https://appshunter.io/developer/1178999943) |

## What reviewers say

### 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 |


### Liar Catcher Detector

[App page](https://appshunter.io/ios/app/liar-catcher-detector/id6758356557)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Year | $14.99 | per year |


## Frequently asked questions

### Is Lie / Truth Detector free?

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

### Is Liar Catcher Detector free?

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

### Do Lie / Truth Detector or Liar Catcher Detector have ads?

Both Lie / Truth Detector and Liar Catcher Detector show ads.

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

Lie / Truth Detector ships an update monthly, and Liar Catcher Detector every 4 months. Most recently, Lie / Truth Detector was updated on November 7, 2026 and Liar Catcher Detector on October 31, 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.*