Naughty or Nice Test Meter vs Sleuth Star
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Naughty or Nice Test Meter
This app lets you test if you or your kids are naughty or nice with a fun "fingerprint scan" and animated elves. Generate official Nice/Naughty Certificates for your children, which can be customized and shared.
- "Fingerprint Scan" for testing
- Animated elves analysis
- Get certified Nice or Naughty
- Customizable Santa's Certificates
- Save and share certificates
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Have you been naughty or nice this year? How about having your kids take the Naughty or Nice test and get certified as Nice? The Naughty or Nice Test Meter features a unique tool to create Nice/Naughty Certificates for your kids. FEATURES • “Fingerprint Scan” for testing (not an actual fingerprint scan but your kids will think it is!) • Beautifully animated elves analyzing your fingerprint • Get certified as Nice or Naughty • Outcome can be set to Random, Naughty, or Nice on the ‘Parents Only’ page • Validate Santa’s beautiful Official Certificates with your child’s photo, name and age • Parents can also edit certificate contents to encourage good behavior • Save or share your official Santa’s Nice/Naughty Certificates PLEASE NOTE All prices are in USD. Pricing in other countries may vary.
Sleuth Star
Engage in a noir detective experience, meticulously searching crime scenes for clues. Analyze evidence with specialized tools and present your findings to a judge to unravel mysteries. Progress through a career ladder with unlockable items that alter gameplay.
- Crime scene investigation
- Clue analysis with equipment
- Present evidence to a judge
- Six hand-crafted cases
- Eight-rank career ladder
- Unlockable items that change gameplay
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Sleuth Star is a noir detective game where you work the case yourself. Step into a 1940s detective's office, search crime scenes for fingerprints and hidden notes, analyze every clue with your equipment, and present what you've found to the bench. Watch the judge react to each exhibit, then reveal what really happened. Six hand-crafted cases across four difficulty tiers, an eight-rank career ladder, seventeen unlockable items that actually change how you play. No ads, no microtransactions, no tracking. Plays fully offline on iPhone and iPad.
Screenshots
Verdict
The clearest difference is review sentiment: Sleuth Star at 100% against Naughty or Nice Test Meter's 43%. Sleuth Star also leads on rating (5.0 vs 4.5) and in-app purchases (none vs 1). Naughty or Nice Test Meter's advantage is ratings volume (4.8K vs 4) and iOS requirement (10.0 vs 17.0). On price 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. Naughty or Nice Test Meter sells 1 one-off in-app purchase. Sleuth Star asks for nothing beyond the download.
Sleuth Star holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Naughty or Nice Test Meter has 4.8K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 43% of Naughty or Nice Test Meter's written reviews are positive against 100% of Sleuth Star's.
Naughty or Nice Test Meter ships an update every 7 months, Sleuth Star daily. The most recent releases landed on October 26, 2026 and October 14, 2026 respectively.
| Parameter | Naughty or Nice Test Meter | Sleuth Star |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4.8K ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 43.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 4.8K — better | 4 |
| Update frequency | Every 7 months | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 41 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Dualverse, Inc. | Mathew Konopinski |
Customer experience
Naughty or Nice Test Meter
Sleuth Star
Bugs and requests
Naughty or Nice Test Meter
Reported bugs
3 issues- Keeps saying 'naughty' even for good behavior
- Doesn't recognize different fingers properly
- Crashes or freezes frequently
Requested features
3 requests- More detailed feedback on why you're naughty or nice
- Option to customize 'naughty' or 'nice' criteria
- Integration with real Santa/elf system
Sleuth Star
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Naughty or Nice Test Meter
- Premium Certificate$3.99
Sleuth Star
No in-app purchases
Questions
Is Naughty or Nice Test Meter free?
Is Sleuth Star free?
Which has better reviews, Naughty or Nice Test Meter or Sleuth Star?
Do Naughty or Nice Test Meter or Sleuth Star have ads?
Which is updated more often, Naughty or Nice Test Meter or Sleuth Star?
Other comparisons
