# Ace Lie Detector Polygraph vs Mood Scanner

The clearest difference is ads: Ace Lie Detector Polygraph at none against Mood Scanner's shown. Ace Lie Detector Polygraph also leads on update cadence (every 4 weeks vs every 13 months) and review sentiment (37% vs 10%). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Ace Lie Detector Polygraph sells 1 one-off in-app purchase and Mood Scanner sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Ace Lie Detector Polygraph holds the better App Store score, 3.1 against 2.8. Both are backed by a comparable volume of ratings — 18 and 39 respectively. Written reviews point the same way: 37% of Ace Lie Detector Polygraph's written reviews are positive against 10% of Mood Scanner's.

Ace Lie Detector Polygraph ships an update every 4 weeks, Mood Scanner every 13 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Ace Lie Detector Polygraph | Mood Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (18 ratings)](https://appshunter.io/ios/app/ace-lie-detector-polygraph/id425093062/reviews)** | [2.8 (39 ratings)](https://appshunter.io/ios/app/mood-scanner-mood-detector/id1226419952/reviews) |
| Number of ratings | 18 | **39** |
| Positive reviews | **36.9% of reviews** | 10.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 weeks** | Every 13 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 15 MB | 7 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tiny Mobile Inc.](https://appshunter.io/developer/360543132) | [Fahad Manzoor](https://appshunter.io/developer/1144176876) |

## What reviewers say

### Ace Lie Detector Polygraph

[App page](https://appshunter.io/ios/app/ace-lie-detector-polygraph/id425093062)

This entertainment app simulates a lie detector for fun. Use its visual technology to "detect" truths from friends and family. Upgrade to manipulate results for jokes.

**Highlights:** Simulated lie detection, TruthWave™ visual technology, Live data display, Result manipulation for jokes, Impress and intimidate friends

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lie Detector Upgrade - Lie Detection special | $0.99 | one-time |

**What reviewers like**

- 🚀 Straight awesomeness
- 👍 Funny and entertaining
- 🤖 Surprisingly accurate at times

**What reviewers complain about**

- 🐛 Inconsistent results
- 💤 Boring and not very useful
- 🤷‍♀️ Doesn't actually work as a lie detector

**Reported bugs**

- App loads upside down on some devices
- Upgrade doesn't work as expected

**Requested features**

- Ability to record audio for more accurate detection
- Option to customize the detection logic


### Mood Scanner

[App page](https://appshunter.io/ios/app/mood-scanner-mood-detector/id1226419952)

Simulate a mood scanner with realistic graphics to entertain friends and family. This app is for amusement only and does not detect actual moods.

**Highlights:** Realistic scanning graphics, Simulates mood detection, Entertain friends and family, Amusement purposes only

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $3.99 | one-time |


## Frequently asked questions

### Is Ace Lie Detector Polygraph free?

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

### Is Mood Scanner free?

Mood Scanner is free to download, with in-app purchases available.

### Which has better reviews, Ace Lie Detector Polygraph or Mood Scanner?

Ace Lie Detector Polygraph is rated higher. Ace Lie Detector Polygraph averages 3.1 out of 5 from 18 ratings, while Mood Scanner averages 2.8 from 39 ratings.

### Do Ace Lie Detector Polygraph or Mood Scanner have ads?

Mood Scanner shows ads; Ace Lie Detector Polygraph does not.

### Which is updated more often, Ace Lie Detector Polygraph or Mood Scanner?

Ace Lie Detector Polygraph ships an update every 4 weeks, and Mood Scanner every 13 months. Most recently, Ace Lie Detector Polygraph was updated on November 1, 2026 and Mood Scanner on November 2, 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.*