Liar Checker vs ETPhone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Liar Checker
This utility app tracks eye movements while you speak to analyze potential thought processes. It helps identify if someone is looking in a particular direction for an extended period, suggesting they might be thinking. Useful for understanding non-verbal cues during conversations.
- Tracks eye direction during conversations
- Analyzes eye movement patterns
- Infers potential thought processes from gaze
- Helps understand non-verbal cues
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---- CORRESPONDING DEVICE --- iPhone 11 Pro Max iPhone 11 Pro iPhone 11 iPhone Xs Max iPhone Xs iPhone XR iPhone X --------- This app allows you to check where your eyes turned. By talking while using the application, you can check the movement of the eyes of the talker. For example, if the talker is looking at the upper left for a long time, there is a high possibility that the person is talking while thinking something.
ETPhone
This application enables real-time gaze computation and recording for eye tracking data collection using a compatible wearable device. It offers control over camera settings, participant calibration, and data recording to an SD card. Collected data can be easily transferred for detailed analysis on a PC.
- Real-time gaze computation
- Gaze data recording
- Camera gain and quality control
- Participant calibration
- SD card recording control
- Data download for PC analysis
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Argus Science is pleased to release the latest version of the ETPhone App for use with the Argus Science ETVision wearable eye tracker. This Release builds upon the original ETPhone App by adding real-time gaze computation and recording directly on your iOS Phone or Tablet, allowing increased flexibility and control for eye tracking data collection. With this latest ETPhone Release you may name files, control gain and quality of the ETVision cameras, calibrate participants, record gaze data and control recording to an SD card inserted in the ETVision controller. After data is collected, it is easy to download the gaze data to a PC with Argus Science’s ETAnalysis program which allows the researcher to perform typical gaze analysis functions such as Fixation definition, Pupillometry and blink criteria as well as automated area of interest creation to name a few.
Screenshots
Verdict
The clearest difference is rating: ETPhone at 3.0 against Liar Checker's 2.1. Liar Checker's advantage is review sentiment (40% vs 0%) and update cadence (every 2 months vs every 16 months). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
ETPhone holds the better App Store score, 3.0 against 2.1. Both are backed by a comparable volume of ratings — 7 and 6 respectively. Written reviews complicate that: 40% of Liar Checker's written reviews are positive against 0% of ETPhone's, so the app with the better star average is not the one people write more warmly about.
Liar Checker ships an update every 2 months, ETPhone every 16 months. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.
| Parameter | Liar Checker | ETPhone |
|---|---|---|
| Price | Free | Free |
| Rating | 2.1 (7 ratings) | 3.0 (6 ratings) — better |
| Positive reviews | 40.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 7 — better | 6 |
| Update frequency | Every 2 months — better | Every 16 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.2 — better | 16 |
| Further details — not scored | ||
| Size | 10 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Jun Izutsu | Argus Science, LLC |
Customer experience
Liar Checker
ETPhone
In-app purchases
Liar Checker
No in-app purchases
ETPhone
No in-app purchases
