Comparison

Ace Lie Detector Polygraph vs Lie Detector Finger Scan

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ace Lie Detector Polygraph

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
Read full description

This app is intended for entertainment purposes only and does not provide true polygraph functionality. Find the TRUE answer to any question you ask of friends, parents, girlfriends, boyfriends, teachers! Lie Detector Polygraph with TruthWave™ visual technology has never been so accessible and affordable! Ultra-cool polygraph TruthWave™ data is displayed live while you conduct your interrogation and it looks awesome! Impress and intimidate your friends with this super slick and useful app! Upgrade to manipulate the results and play jokes on your friends. Trust us it's funny!

About

Lie Detector Finger Scan

This entertainment app simulates a lie detector using fingerprint scanning. Prank friends and family by making them believe you can detect if they are lying. It offers preset truth or lie answers or random results for fun.

Highlights
  • Fingerprint scanner simulation
  • Preset truth/lie answers
  • Random result mode
  • Realistic animations and sounds
  • Prank friends and family
Features
Read full description

Settle the moment with a playful truth test and skip awkward guessing. Run a finger scan, get a dramatic lie detector verdict, and turn any hangout into a quick party game. Lie Detector Finger Scan helps friends run a simulated lie detector scan for laughs, party prompts, and shareable results. Everything happens on this device, with no account needed and no real lie detection claims. The app is built for entertainment, keeps a clear “For entertainment only” label on results, and gives you quick ways to start a scan, stop it, replay past results, or jump into party games when you want more than a simple finger scan. - Run a Fingerprint scan with a large touch stage, animated scan line, progress bar, and clear Start Scan or Stop control. - Switch result mode between Random and Preset when you want a surprise verdict or want to pin TRUE or LIE for a repeated demo. - Turn on MAYBE for an inconclusive result and add more variety to each truth detector moment. - Watch the verdict reel spin into TRUE, LIE, or MAYBE for a playful reveal, with a simulated stress meter shown beside the polygraph-style gauge. - Save recent lie detector results with time and simulated stress, review summary counts, or clear history in one tap. - Add your own question before a scan or use the random question generator when nobody knows what to ask. - Use Shake-to-Scan for a faster party flow, and keep a Truth Streak going when the same result lands more than once. - Jump into Party Games with decks like Truth or Dare, Would You Rather, Two Truths One Lie, Never Have I Ever, Hot Seat, Couples Quiz, Friend Confessions, and Icebreakers. - Save favorite party cards, filter by category, share a party card image, or test reflexes in Reaction Time with personal-best tracking. - Check Insights to see your TRUE, LIE, and MAYBE split, daily activity, scan mode usage, and party deck activity over time. - Share a result card image with a simulated entertainment badge so friends see the joke right away. - Break the ice at a party with Duo mode, then pass the phone back and forth for turn-based scans. - Add a random question before a Fingerprint scan when the group wants a quick truth or dare style prompt. - Use the History list after game night to replay funny verdicts and compare simulated stress scores. - Open the daily question from the Home Screen widget when you want a fresh prompt without thinking. - Start a quick reaction challenge between rounds of Would You Rather or Never Have I Ever. Pro adds more ways to play: Voice mode with a live waveform, Face mode with a live camera preview and playful pulse highlights, Duo mode, Truth Mode for planned TRUE, LIE, or MAYBE runs, premium party decks, extra voice packs, scan replay from history, a shareable polygraph report, Live Activity during a scan, and ad-free use. Microphone and camera access are only used for simulated scan views, and no audio, photos, or video are recorded. Your scans, favorites, and history stay on this device unless you choose to share or export. Try a finger scan, pick a question, and bring a little drama to your next party. Terms of Use (EULA) - http://www.apple.com/legal/itunes/appstore/dev/stdeula

Screenshots

Ace Lie Detector Polygraph1 screens
Lie Detector Finger Scan4 screens

Verdict

The call

The clearest difference is rating: Lie Detector Finger Scan at 4.0 against Ace Lie Detector Polygraph's 3.1. Lie Detector Finger Scan also leads on monetization model (free vs free with in-app purchases). Ace Lie Detector Polygraph's advantage is ads (none vs shown) and update cadence (every 4 weeks vs every 3 months). On price, review sentiment, ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Ace Lie Detector Polygraph sells 1 one-off in-app purchase and Lie Detector Finger Scan sells 10 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Lie Detector Finger Scan holds the better App Store score, 4.0 against 3.1. Both are backed by a comparable volume of ratings — 18 and 8 respectively. Written reviews complicate that: 37% of Ace Lie Detector Polygraph's written reviews are positive against 33% of Lie Detector Finger Scan's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Ace Lie Detector Polygraph ships an update every 4 weeks, Lie Detector Finger Scan every 3 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 5 level
Ace Lie Detector Polygraph versus Lie Detector Finger Scan: the parameters behind the verdict, then further details
ParameterAce Lie Detector PolygraphLie Detector Finger Scan
PriceFreeFree
Rating3.1 (18 ratings)4.0 (8 ratings) — better
Positive reviews36.9% of reviews — better33.3% of reviews
Number of ratings18 — better8
Update frequencyEvery 4 weeks — betterEvery 3 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better26.0
Further details — not scored
Size15 MB12 MB
Age rating4+4+
DeveloperTiny Mobile Inc.Sandeep Bhandari

Customer experience

Ace Lie Detector Polygraph

All ratings18 ratings
Positive44.4%
Neutral11.1%
Negative44.4%
Written reviews160 reviews
Positive36.9%
Neutral12.5%
Negative50.6%

Lie Detector Finger Scan

All ratings8 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

Bugs and requests

Ace Lie Detector Polygraph

Reported bugs

2 issues
  • App loads upside down on some devices
  • Upgrade doesn't work as expected

Requested features

2 requests
  • Ability to record audio for more accurate detection
  • Option to customize the detection logic

Lie Detector Finger Scan

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Ace Lie Detector Polygraph

One-time1
  • Lie Detector Upgrade - Lie Detection special$0.99
10 purchases

Lie Detector Finger Scan

Subscriptions8
  • Weekly Subscription$1.997 Days
  • Monthly Subscription7 Days trial$4.991 Month
  • Pro Weekly$4.997 Days
Show 5 more
  • Yearly Subscription Discount7 Days trial$14.991 Year
  • Yearly Subscription Sale$14.991 Year
  • Yearly Subscription Special$19.991 Year
  • Yearly Subscription1 Year trial$29.991 Year
  • Pro Annual7 Days trial$29.991 Year
One-time2
  • Forever Pro Discount$79.99
  • Forever Pro$99.99

Questions

Is Ace Lie Detector Polygraph free?
Ace Lie Detector Polygraph is free to download, with in-app purchases available.
Is Lie Detector Finger Scan free?
Lie Detector Finger Scan is free to download, with in-app purchases available.
Which has better reviews, Ace Lie Detector Polygraph or Lie Detector Finger Scan?
Lie Detector Finger Scan is rated higher. Ace Lie Detector Polygraph averages 3.1 out of 5 from 18 ratings, while Lie Detector Finger Scan averages 4.0 from 8 ratings.
Do Ace Lie Detector Polygraph or Lie Detector Finger Scan have ads?
Lie Detector Finger Scan shows ads; Ace Lie Detector Polygraph does not.
Which is updated more often, Ace Lie Detector Polygraph or Lie Detector Finger Scan?
Ace Lie Detector Polygraph ships an update every 4 weeks, and Lie Detector Finger Scan every 3 months. Most recently, Ace Lie Detector Polygraph was updated on November 1, 2026 and Lie Detector Finger Scan on November 6, 2026.

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