# Fibster: Lie Detector — Advanced Lie Detector Test

> Simulated lie detector test using heart rate analysis for entertainment. (iPhone/iPad app by Drew Smith.)

- Source: https://appshunter.io/ios/app/fibster-lie-detector/id6478163053 (this page in markdown: same URL + `.md`)
- Developer: [Drew Smith](https://appshunter.io/developer/1710757678)
- Category: Entertainment
- Price: $6.99 with in-app purchases (on sale, was $14.99)
- Rating: 2.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.4 · 2 MB
- Languages: American English
- Released: 2024-02-22
- Data updated: 2026-08-15
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/fibster-lie-detector/id6478163053/reviews.md

## What is Fibster?

Discover Fibster, the most advanced lie detector test app ever created. A leap beyond other lie detector test apps, utilizing the participant's real physiological (heart rate) data. As questions are asked and answered, Fibster analyzes real-time reactions, subtle changes in the intervals between heartbeats, to determine test results. Ideal for lively game nights or a playful peek into what a polygraph test feels like.

Based on scientific principles used in professional polygraph practice, Fibster simplifies complex lie detection into an engaging user experience. With just four questions—two baseline, two relevant—dive into a quick, 80-second truth-seeking adventure. The app guides you on creating effective questions in the FAQs, enhancing your Fibster experience. FAQs are accessed by tapping the icon (?) on the top right of the Home Screen.

How it works:

Fibster uses technology that turns your camera/flash into a photoplethysmogram (PPG), which is what many wearable devices use to measure pulse. This app goes further than simply measuring pulse, beats per minute (BPM); it analyzes the micro time intervals between heartbeats, which is a key indicator for stress. Then by comparing the changes in stress levels between irrelevant and relevant questions, using our scoring algorithm, it determines test results. 

The following is a guide to using the app:

- Enable iCloud Authentication.
- Tap the logo (button) to begin.
- Agree to the acknowledgement.
- Create two relevant questions, tap next.
- Create two irrelevant questions, tap save.
- Instructions on question creation are in the FAQs (“?”) section of the app, icon on the top right of the Home Screen.
- Review questions, tap start test.
- Calibrating message pops up on screen; participant places finger over camera/flash to begin acquiring heart rate data.
- Go through all eight test questions. Each question is designed to be at least 10 seconds in order to analyze the required information.
- After all questions are completed, the result screen displays the outcome of the test.

Attention:

- This app is not 100% accurate.
- Do not make important decisions based on this app.
- Do not force people to use this app (take tests).

Disclaimer: This app is designed for entertainment purposes only and is not a substitute for professional polygraph examinations conducted by seasoned examiners with sophisticated instruments. Fibster is not an accredited/recognized polygraph or lie detection device. Heart rate data analyzed during tests is never saved or stored.

By downloading and using this app, you agree to the Privacy Policy and Terms of Service:

Privacy Policy:
https://app.termly.io/document/privacy-policy/42bed339-306e-4d61-b5f3-38364946dd52

Terms of Service:
https://app.termly.io/document/terms-of-service/a9202476-3c03-4f35-9764-95dad02fa842

## Key features

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

## Pricing and in-app purchases

Base price: $6.99.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Annual | $7.99 | per year |
| Monthly | $0.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | Free | one-time |


## Chart rankings

- #187 in Top Paid · Entertainment (US App Store)


## Frequently asked questions about Fibster

### What is Fibster?

Fibster is an entertainment app that simulates a lie detector test. It uses your phone's camera to analyze heart rate data and determine test results for amusement.

### How does Fibster work?

Fibster uses your phone's camera and flash to measure heart rate, analyzing micro time intervals between heartbeats to detect stress levels. It compares these changes between irrelevant and relevant questions to simulate a test outcome.

### Is Fibster accurate?

No, Fibster is designed for entertainment purposes only and is not 100% accurate. It is not a substitute for professional polygraph examinations and important decisions should not be based on its results.

### What are the subscription options for Fibster?

Fibster offers a monthly subscription for $0.99 and an annual subscription for $7.99. These plans provide access to the app's features.

### What devices does Fibster support?

Currently, Fibster is supported on iPhone devices. The app is designed to work with the camera and flash functionalities available on these devices.

### How often is Fibster updated?

The latest version of Fibster is 1.0.6, last updated on November 8, 2024. Updates typically include improvements and bug fixes to enhance the user experience.

### Can I use Fibster offline?

The provided data does not specify offline functionality. However, features like iCloud authentication suggest an internet connection may be required for certain operations.

### What is the age rating for Fibster?

Fibster has an age rating of 4+. This indicates it is suitable for a wide audience, though parental guidance is always recommended for entertainment apps.

## Version history (last 5 releases)

### 1.0.6 — 2024-11-08

- Added Heart Rate Graph; Shows Fluctuations in Real-Time (Normal[green]-High[Red]) 
- Added Heart Rate Chart on Results Screen; Improved Transparency 
- Removed "Ask" and "Answered" Buttons; Easier/Improved User Experience 
- Added Value and Removed Subscriptions & Free Version; Updated to Paid-App Only 
- Early Adopters (Existing Users) Will be Given Free Access; Thank You for Your Support! 
- Bug Fixes /\/\(•⏝•)/\/\

### 1.0.5 — 2024-11-07

- Added Heart Rate Graph; Shows Fluctuations in Real-Time (Normal[green]-High[Red])
- Added Heart Rate Chart on Results Screen; Improved Transparency
- Removed "Ask" and "Answered" Buttons; Easier/Improved User Experience
- Removed Subscriptions and Free Version; Updated to Paid-App Only

### 1.0.4 — 2024-10-31

- Added Heart Rate Graph; Shows Fluctuations in Real-Time (Normal[green]-High[Red])
- Added Heart Rate Chart on Results Screen; Improved Transparency
- Removed "Ask" and "Answered" Buttons; Easier/Improved User Experience
- Removed Subscriptions and Free Version; Updated to Paid-App Only

### 1.0.3 — 2024-10-30

- Added Heart Rate Graph; Shows Fluctuations in Real-Time (Normal[green]-High[Red])
- Added Heart Rate Chart on Results Screen; Improved Transparency
- Removed "Ask" and "Answered" Buttons; Easier/Improved User Experience
- Removed Subscriptions and Free Version; Updated to Paid-App Only

### 1.0.2 — 2024-10-25

- Added Heart Rate Graph; Shows Fluctuations in Real-Time (Normal[green]-High[Red])
- Added Heart Rate Chart on Results Screen; Improved Transparency
- Removed "Ask" and "Answered" Buttons; Easier/Improved User Experience
- Removed Subscriptions and Free Version; Updated to Paid-App Only

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*