Fallacy vs Stargazer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fallacy
This app teaches logical reasoning and critical thinking skills by turning the identification of logical fallacies and cognitive biases into a game. It offers structured brain training with daily exercises and timed challenges, using real-world scenarios and media to build applied intelligence.
- Identify 30+ logical fallacies
- Recognize 20+ cognitive biases
- Daily brain exercises
- Timed reasoning challenges
- Debate Mode with real-world arguments
- Progressive difficulty levels
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Do you trust your own thinking? Most people unknowingly fall for the same logical fallacies and cognitive biases every day — in conversations, on social media, in the news, and in their own decisions. Fallacy is the first brain training app built to sharpen one critical skill: your ability to think clearly, spot flawed reasoning, and win any argument with logic. PEOPLE YOU MEET — OUTSMART REAL-LIFE CHARACTERS Ever tried reasoning with a WhatsApp Uncle who forwards conspiracy theories? Or an overconfident AI that sounds smart but gets everything wrong? In People You Meet, you go head-to-head with characters inspired by people in your life. Spot their logical fallacies, identify their cognitive biases, plan your comeback, and win arguments using critical thinking instead of volume. Every character uses different reasoning tricks — this brain training mode teaches you more about logic and flawed thinking than any textbook. MASTER 30+ LOGICAL FALLACIES From Ad Hominem and Straw Man to the Slippery Slope and Appeal to Authority — master every major logical fallacy through real-world brain training scenarios. Each logical fallacy includes clear explanations, everyday examples, and progressive reasoning challenges that build genuine critical thinking. Whether you encounter these logical fallacies in the news, at work, or in a debate, you will spot them instantly after training. RECOGNIZE 20+ COGNITIVE BIASES Confirmation bias. Anchoring. The Dunning-Kruger effect. These invisible cognitive biases shape your decisions every day. Fallacy is the only brain training game that teaches you to detect cognitive biases in yourself and others through hands-on reasoning exercises. Understanding your cognitive biases is the foundation of stronger critical thinking and better decisions. DEBATE MODE — SHARPEN YOUR REASONING Step into real debates on real topics. Read opposing arguments, spot the logical fallacies hidden inside, and build powerful reasoning skills. Debate Mode is the ultimate brain training for critical thinking — improve how you argue, evaluate claims, and win debates using pure logic. Every debate round strengthens your reasoning and sharpens your ability to spot cognitive biases under pressure. CHALLENGE MODE — SPOT BIAS IN REAL NEWS Scroll through headlines and posts from real-world news sources. Your mission: spot the flawed reasoning and logical fallacies before time runs out. Challenge Mode is brain training for the real world — building the critical thinking and media literacy skills you need to detect cognitive biases in the news you consume daily. PRECISION IQ SCORING & PROGRESS TRACKING Your reasoning ability is measured with a precision IQ score that updates as you train. Track your 30, 60, and 90-day progress. Watch your critical thinking improve with clear insights into your cognitive growth. Brain training works best when you see results — Fallacy shows you exactly how your reasoning improves over time. DAILY BRAIN EXERCISES & 5 DIFFICULTY LEVELS Build a daily brain training habit with fresh logic puzzles and reasoning challenges every day. Maintain your streak and strengthen your mental fitness. Five difficulty levels take you from beginner to expert reasoning — keeping brain training challenging no matter your skill level. WHY FALLACY IS THE SMARTEST BRAIN TRAINING APP Other brain games train memory or math. Fallacy is the only brain training app focused on logical fallacies, cognitive biases, and real-world critical thinking. From planning a comeback against flawed reasoning to winning debates with logic — this is brain training that makes you smarter in conversations, arguments, and everyday life. Download Fallacy for free. Start brain training and master the critical thinking skills that actually matter. https://www.spotfallacy.com/privacy-policy https://www.spotfallacy.com/terms-and-conditions
Stargazer
Explore the night sky by pointing your device upwards. Identify planets, constellations, stars, and satellites. Features an AI assistant for astronomy questions and an augmented reality mode to visualize celestial bodies.
- Point-and-identify celestial objects
- AI-powered astronomy assistant
- Augmented reality solar system exploration
- Constellation artwork and facts
- Night photography planning
- Printable star charts
- Interactive sky quiz
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Point your phone at the sky. Stargazer tells you exactly what you're looking at. Free. Genuinely free — no ads, no in-app purchases, no subscription, no account, no tracking. Not "free to start". Free, forever, everywhere. Knowing what's above your head shouldn't cost money. POINT AND KNOW Hold your phone up and the sky moves with you. Every planet, all 88 constellations, thousands of stars, deep-sky wonders, comets, asteroids and the satellites passing overhead right now. Tap anything to find out what it is. TWO SKIES OVER THE SAME STARS All 88 IAU constellations, each with classic hand-painted artwork warped onto the real stars. Then switch to the Boorong sky — the stars as read by the Boorong people of north-western Victoria — and the Southern Cross becomes a tree with a possum up it, chased by Tchingal the Emu: a constellation made not of stars but of the dark dust lanes of the Milky Way. Every figure names the nation it belongs to and cites its source. THE MOON, AS YOU ACTUALLY SEE IT Tilted the way it truly appears from your latitude — from the southern hemisphere it looks "upside down" compared with northern pictures, and Stargazer is one of the very few apps that gets this right. Drag through minutes, hours, days or a month. See whether tonight's Moon really is bigger than average, against a ring showing its usual size. SPIN THE EARTH Every satellite in orbit right now, wrapped around a globe you can spin and zoom. Search for one, or filter to Starlink and watch hundreds sweep past in formation. NOVA — PRIVATE AI THAT KNOWS ITS ASTRONOMY Ask anything. "Why does the Moon change shape?" "What's that bright star?" Nova runs on Apple Intelligence, entirely on your device. Your questions never leave your phone — there's no server to send them to. Grounded in a verified knowledge base, so answers are right rather than merely confident. A KIDS MODE THAT DOESN'T TALK DOWN Simpler words, same real science. Ask "how big is the Sun?" and get an answer a seven-year-old understands and an adult won't wince at. WALK AROUND THE SOLAR SYSTEM IN AR Put Saturn on your kitchen table. Walk around it, drag it, pinch to resize it. View planets, moons and the ISS in 3D, then step inside an AR orrery and watch the planets orbit around you. BUILT FOR CLASSROOMS No ads to distract. Nothing to buy. No sign-in, no data collection, nothing to consent to — so it clears school IT review easily. Printable A4 star charts for your date and place. A sky quiz with three levels. First Nations seasonal knowledge, sourced and attributed, for the cross-curriculum priority. Teachers: the whole sky, the phases, the seasons, the scale of the solar system — demonstrable in seconds on any iPhone, iPad or Mac in the room. ALSO INSIDE • Tonight — ISS passes, meteor showers, conjunctions, what's up now • 5,000+ fact-checked space facts, a new one every day • Night photography planner: darkness, moonless windows, Milky Way core • Time travel — tonight, next month, ten thousand years • Ask Siri for the moon phase or what's up tonight • Dark-sky finder and live stargazing conditions • Home-screen widgets, night-vision red mode, metric or imperial • VoiceOver labels throughout and full Dynamic Type support YOUR PRIVACY, PLAINLY We collect nothing. No analytics, no advertising identifiers, no profiles, no third-party SDKs. Your location is used on your device to work out your sky and is never transmitted. There's no account, because there's nothing to store. The AI is on-device. We couldn't sell your data if we wanted to — we don't have it. Made for anyone who has ever looked up and wondered. Kids, teachers, campers, insomniacs, grandparents, and everyone who has pointed at a bright dot and asked what it was. Look up. It's free.
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Verdict
The clearest difference is rating: Fallacy at 4.5 against Stargazer's 3.0. Fallacy also leads on ratings volume (58 vs 2) and iOS requirement (15.1 vs 26.0). Stargazer's advantage is in-app purchases (none vs 6) and update cadence (weekly vs fortnightly). On price, ads 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. Fallacy sells 6 in-app purchases, starting at $6.99 per 7 days. Stargazer asks for nothing beyond the download.
Fallacy holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Fallacy has 58 ratings behind it against 2, so its average is the more settled of the two.
Fallacy ships an update fortnightly, Stargazer weekly. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.
| Parameter | Fallacy | Stargazer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (58 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 76.9% of reviews | — |
| Number of ratings | 58 — better | 2 |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 95 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | VERTEX STUDIOS LTD | Kendal Slack |
Customer experience
Fallacy
Stargazer
In-app purchases
Fallacy
- Weekly Premium Access$6.997 Days
- Monthly Subscription Fallacy7 Days trial$12.991 Month
- Monthly Premium Access1 Month trial$12.991 Month
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- Yearly Premium Access7 Days trial$49.991 Year
- Yearly Subscription Fallacy7 Days trial$59.991 Year
- Lifetime Access - Premium$79.99
Stargazer
No in-app purchases









