# Lie / Truth Detector vs Sweepz

The clearest difference is in-app purchases: Sweepz at none against Lie / Truth Detector's 3. Lie / Truth Detector's advantage is update cadence (monthly vs every 30 months) and device support. On price and iOS requirement there is nothing between them.

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

Lie / Truth Detector ships an update monthly, Sweepz every 30 months. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Lie / Truth Detector | Sweepz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (291 ratings)](https://appshunter.io/ios/app/lie-truth-detector-polygraph/id1558500142/reviews)** | — |
| Number of ratings | **291** | — |
| Positive reviews | 44.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | **Monthly** | Every 30 months |
| Monetization | Free with in-app purchases | — |
| Size | 120 MB | 0 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 12+ |
| Developer | [Luis Hernando Prada](https://appshunter.io/developer/1554735315) | [The Native Dev, LLC](https://appshunter.io/developer/1462671328) |

## 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 |


### Sweepz

[App page](https://appshunter.io/ios/app/sweepz/id6465692423)

**In-app purchases:** none


## Frequently asked questions

### Is Lie / Truth Detector free?

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

### Is Sweepz free?

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

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

Lie / Truth Detector ships an update monthly, and Sweepz every 30 months. Most recently, Lie / Truth Detector was updated on October 15, 2026 and Sweepz on October 3, 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.*