The Master Key System vs AI Lie Detector.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The Master Key System
This application provides an audio version of "The Master Key System," a personal development book focusing on New Thought principles. It features synchronized narration, allowing users to read and listen simultaneously, with exercises and Q&A sections for each chapter.
- Synchronized audio narration
- Chapter exercises and Q&A
- Adjustable font size and style
- Night and day reading modes
- Background audio playback
- Text highlighting
Read full descriptionHide full description
This app combines "The Master Key System", a personal development book by Charles F. Haanel with professional human narration. The book describes many New Thought beliefs such as the law of attraction, creative visualization and man's unity with God, and teaches the importance of truth, harmonious thinking and the ability to concentrate. Each of the 24 chapters contains an introduction, followed by a sequentially numbered section which includes an exercise towards the end, followed by a section with questions and answers. Each chapter ends with an exercise which the reader is encouraged to undertake every day for the following 4–7 days. The exercises are meditations that require the reader to first sit comfortably in a chair. The ideas behind the book mainly come from New Thought philosophy, but there are influences from other sources such as Hinduism, Masonic and Rosicrucian teachings, Theosophy, and the Bible. Benefits of sync audio feature: ● a valuable tool for people affected by reading disorders and dyslexia ● a useful tool for kids to learn reading or for people to learn a foreign language ● allowing everybody to enjoy their favourite book by reading, listening or reading+listening ● Long press a word and tap "Play" to activate sync narration You can both read and listen to your favorite book. The app will highlight the sentence being narrated so that you can follow along as the words are read aloud. Thanks to sync narration feature, you can change from reading to listening or vice versa easily. ● other features: - change font size and style - night and day reading mode - highlight text - Audio play in background (you can listen to the audio, while using other apps) ● If you want to give feedback, please use the feedback feature in the settings
AI Lie Detector.
Engage in realistic Q&A sessions where an AI analyzes voice recordings to detect truthfulness. Powered by GPT-4, it evaluates context, logic, tone, and emotion, providing explanations for its judgments. This app is designed for entertainment and fun interactions.
- Voice-based Q&A analysis
- AI truth/lie detection
- GPT-4 powered analysis
- Explanation of judgments
- Psychological game for friends
- Easy-to-use interface
Read full descriptionHide full description
[AI Lie Detector: AI Judges Truth and Lies] Ask questions, answer by voice, and let AI analyze the conversation to detect truth or lies. [Realistic Q&A, AI Judgment] Record your question and answer with voice. AI evaluates the context, logic, tone, and emotion to determine truthfulness. [Powered by GPT-4] Not just keywords—AI uses advanced language analysis for precise detection. [Reasons Provided] AI explains why it judged the answer as true or false, analyzing emotions and logic. [Easy to Use] Open the app Record question Record answer Get instant AI result [Fun & Friendly] Play with friends anytime as a psychological game. [Note] For entertainment only—not for legal or scientific use. [Perfect For] Truth games with friends or couples Testing sincerity with AI Fun, new communication experiences
Screenshots
Verdict
The clearest difference is in-app purchases: AI Lie Detector. at none against The Master Key System's 1. The Master Key System's advantage is review sentiment (25% vs 0%) and iOS requirement (8.0 vs 17.0). On price, ads, monetization model and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. The Master Key System sells 1 one-off in-app purchase. AI Lie Detector. asks for nothing beyond the download.
| Parameter | The Master Key System | AI Lie Detector. |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (7 ratings) — better | — |
| Positive reviews | 25.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 7 — better | — |
| Update frequency | — | Every 2 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 49 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Huong Nguyen | GKUER |
Customer experience
The Master Key System
AI Lie Detector.
In-app purchases
The Master Key System
- Unlock All$0.99
AI Lie Detector.
No in-app purchases
Questions
Is The Master Key System free?
Is AI Lie Detector. free?
Do The Master Key System or AI Lie Detector. have ads?
Other comparisons















