# Fibster vs Truth Scan Biometric Polygraph

The clearest difference is update cadence: Fibster at every 6 days against Truth Scan Biometric Polygraph's every 6 weeks. Fibster also leads on chart position (#197 vs unranked). Truth Scan Biometric Polygraph's advantage is price ($0.99 vs $6.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Fibster costs $6.99 and Truth Scan Biometric Polygraph $0.99 up front. Fibster sells 3 in-app purchases, starting at $0.99 per month and Truth Scan Biometric Polygraph sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Fibster ships an update every 6 days, Truth Scan Biometric Polygraph every 6 weeks. The most recent releases landed on October 19, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Fibster | Truth Scan Biometric Polygraph |
| --- | --- | --- |
| Price | $6.99 | **$0.99** |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/fibster-lie-detector/id6478163053/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 6 weeks |
| Monetization | Paid | — |
| Best chart rank | **#197** | — |
| Size | 2 MB | 8 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Drew Smith](https://appshunter.io/developer/1710757678) | [Thomas Adler](https://appshunter.io/developer/1863023993) |

## What reviewers say

### Fibster

[App page](https://appshunter.io/ios/app/fibster-lie-detector/id6478163053)

**Currently charting:** #197 Top Paid · Entertainment (US App Store)

This app simulates a lie detector test using your phone's camera to analyze heart rate data. It's designed for entertainment, offering a quick, engaging experience to explore physiological reactions to questions.

**Highlights:** Heart rate analysis via camera, Simulated polygraph test, Question creation guide, Quick 80-second tests, Entertainment focused, iCloud authentication

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annual | $7.99 | per year |
| Lifetime | Free | one-time |


### Truth Scan Biometric Polygraph

[App page](https://appshunter.io/ios/app/truth-scan-biometric-polygraph/id6770013367)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Truth Scan Pro | $3.99 | per month |
| yearly | $39.99 | per year |


## Frequently asked questions

### Is Fibster free?

Fibster costs $6.99, and also offers in-app purchases.

### Is Truth Scan Biometric Polygraph free?

Truth Scan Biometric Polygraph costs $0.99, and also offers in-app purchases.

### Do Fibster or Truth Scan Biometric Polygraph have ads?

Neither Fibster nor Truth Scan Biometric Polygraph shows ads.

### Which is updated more often, Fibster or Truth Scan Biometric Polygraph?

Fibster ships an update every 6 days, and Truth Scan Biometric Polygraph every 6 weeks. Most recently, Fibster was updated on October 19, 2026 and Truth Scan Biometric Polygraph on October 12, 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.*