# Lie Finder vs Polygraph AI

The clearest difference is ads: Lie Finder at none against Polygraph AI's shown. Polygraph AI's advantage is update cadence (every 2 days vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Lie Finder ships an update every 2 months, Polygraph AI every 2 days. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Lie Finder | Polygraph AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/lie-finder/id1459593709/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 119 MB | 31 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AndEtc, Inc.](https://appshunter.io/developer/1311918485) | [Andres Saiz Ruiperez](https://appshunter.io/developer/6781788677) |

## What reviewers say

### Lie Finder

[App page](https://appshunter.io/ios/app/lie-finder/id1459593709)

This entertainment app claims to detect lies by analyzing voice audio. It processes sound frequencies to differentiate between truthful and deceptive speech, offering a fun way to uncover the truth in everyday situations. Use it to test friends, family, or even pets for amusement.

**Highlights:** Voice audio analysis, Pseudo-Dynamic Wave Interpretation, Lie detection, Fun for friends and family, Real-time feedback

**In-app purchases:** none


### Polygraph AI

[App page](https://appshunter.io/ios/app/polygraph-ai-lie-analysis/id6796011746)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lie Finder free?

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

### Is Polygraph AI free?

Polygraph AI is free to download, with no in-app purchases.

### Do Lie Finder or Polygraph AI have ads?

Polygraph AI shows ads; Lie Finder does not.

### Which is updated more often, Lie Finder or Polygraph AI?

Lie Finder ships an update every 2 months, and Polygraph AI every 2 days. Most recently, Lie Finder was updated on November 3, 2026 and Polygraph AI on November 6, 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.*