Lie Detector by the Expression Downloads & RevenueLie Detector by the Expression · App Store
Not in any tracked top chart right now.
Updated 11 Nov 2026 · rankings refresh through the day
DeveloperJorge Gregorio Martin Bello
CategoryUtilities
PriceFree
Released
Rating★ 4.2 (60)
Version1.6
Age rating4+
First seen by us
23 Oct 2026
Lie Detector by the Expression update history & changes
Last change · 3 events since 7 Sep 2018Full timeline ↓Full timeline · 2 events in the last 12 months
- 🆕Lie Detector by the Expression first spotted by AppInsiderUnited States (found via developer)
- 🆕Lie Detector by the Expression released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.2 ★
60 ratings
Measured
Lie Detector by the Expression on the App Store
App details
App ID
1418456153
Publisher
Jorge Gregorio Martin Bello
On the store since
Sep 2018
8 years on the store
Minimum OS
iOS 11.0+
iPhone 5s and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
1
EN
Size
42 MB
Also listed in
Entertainment
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.2 ★
60 ratings
Measured
Ratings
60
Measured
About Lie Detector by the Expression
Discover this lie detector that tracks the face expressions to know when someone tells a lie. Based in real psychology studies.
"Lie Detector by the Expression" is based in live real tracking of the face.
This app is able to track the eyes movement, lips and face shape to compare with nine different expressions that unconsciously make people when they lie.
Instructions:
Record the face of the user you want to track face and press record button.
Ask him a question while you are recording the face.
Press Stop button when the answer finishes and you will get instantly the result: Lie or True.
Of course the result depends on the ability of user to keep a neutral face while answering.
The result is not totally reliable, but is is based in real psychology studies.
The expressions that are studied to determine the result are:
1) Eyes darting: People´s eyes usually dart back and forth when they feel uncomfortable.
2) Rapid Blinking: When people are stressed about lying, they may blink five or six times in rapid succession.
3) Closing eyes for more than one second at a time: People often close their eyes for more than a second at a time when they are lying.
4) Looking up to the right: Right-handed people usually look up to their right when they are about what they saw.
5) Looking directly to the right: Right-handed people look directly to their right when lying about what they heard.
6) Looking down to the right: Right-handed people often look down to their right when they are lying aout smells or sensations.
7) False smile: A false smile do not affect the eyes and it´s just done with the mouth.
8) Pursed lips: People may purse their lips to counteract the dry mouth that comes when lying.
9) Head shaking: If people shake their heads while saying something, they have just denied their statement.
Download now "Lie Detector by the Expression" and do not try lie!
"Lie Detector by the Expression" is based in live real tracking of the face.
This app is able to track the eyes movement, lips and face shape to compare with nine different expressions that unconsciously make people when they lie.
Instructions:
Record the face of the user you want to track face and press record button.
Ask him a question while you are recording the face.
Press Stop button when the answer finishes and you will get instantly the result: Lie or True.
Of course the result depends on the ability of user to keep a neutral face while answering.
The result is not totally reliable, but is is based in real psychology studies.
The expressions that are studied to determine the result are:
1) Eyes darting: People´s eyes usually dart back and forth when they feel uncomfortable.
2) Rapid Blinking: When people are stressed about lying, they may blink five or six times in rapid succession.
3) Closing eyes for more than one second at a time: People often close their eyes for more than a second at a time when they are lying.
4) Looking up to the right: Right-handed people usually look up to their right when they are about what they saw.
5) Looking directly to the right: Right-handed people look directly to their right when lying about what they heard.
6) Looking down to the right: Right-handed people often look down to their right when they are lying aout smells or sensations.
7) False smile: A false smile do not affect the eyes and it´s just done with the mouth.
8) Pursed lips: People may purse their lips to counteract the dry mouth that comes when lying.
9) Head shaking: If people shake their heads while saying something, they have just denied their statement.
Download now "Lie Detector by the Expression" and do not try lie!
Latest updates
1.6
New icon.
New name.