# Lie Detector vs JDKit Science

The clearest difference is in-app purchases: JDKit Science at none against Lie Detector's 4. JDKit Science also leads on ads (none vs shown) and iOS requirement (9.0 vs 12.0). Lie Detector's advantage is update cadence (every 8 months vs every 67 months). On price and device support there is nothing between them.

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

Lie Detector ships an update every 8 months, JDKit Science every 67 months. The most recent releases landed on October 27, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Lie Detector | JDKit Science |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (30 ratings)](https://appshunter.io/ios/app/lie-detector-truth-test-scan/id807454884/reviews)** | — |
| Number of ratings | **30** | — |
| Positive reviews | 13.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 8 months** | Every 67 months |
| Monetization | Free with in-app purchases | — |
| Size | 88 MB | 8 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iDevver Apps Limited](https://appshunter.io/developer/453983205) | [InSoo Kim](https://appshunter.io/developer/975978291) |

## 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, Vision Pro support

**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 |


### JDKit Science

[App page](https://appshunter.io/ios/app/jdkit-science/id1186722278)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lie Detector free?

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

### Is JDKit Science free?

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

### Do Lie Detector or JDKit Science have ads?

Lie Detector shows ads; JDKit Science does not.

### Which is updated more often, Lie Detector or JDKit Science?

Lie Detector ships an update every 8 months, and JDKit Science every 67 months. Most recently, Lie Detector was updated on October 27, 2026 and JDKit Science on October 26, 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.*