# Fibster vs Petschats

The clearest difference is price: Petschats at Free against Fibster's $6.99. Petschats also leads on in-app purchases (none vs 3) and device support (3 vs 1). Fibster's advantage is update cadence (every 6 days vs every 7 months). On ads there is nothing between them.

Petschats is free to download; Fibster costs $6.99 up front. Fibster sells 3 in-app purchases, starting at $0.99 per month. Petschats asks for nothing beyond the download.

Fibster ships an update every 6 days, Petschats every 7 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | Fibster | Petschats |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/fibster-lie-detector/id6478163053/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 7 months |
| Monetization | Paid | — |
| Size | 2 MB | 16 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Drew Smith](https://appshunter.io/developer/1710757678) | [DIMARIS AQUINO](https://appshunter.io/developer/1802010320) |

## What reviewers say

### Fibster

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

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 |


### Petschats

[App page](https://appshunter.io/ios/app/petschats/id6743237758)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fibster free?

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

### Is Petschats free?

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

### Do Fibster or Petschats have ads?

Neither Fibster nor Petschats shows ads.

### Which is updated more often, Fibster or Petschats?

Fibster ships an update every 6 days, and Petschats every 7 months. Most recently, Fibster was updated on October 25, 2026 and Petschats on October 25, 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.*