BrainHero vs Stargazer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BrainHero
Engage in quick, fun brain training exercises across various categories like memory, logic, math, and reaction. Earn XP, level up, and build streaks with a daily challenge. Designed for short, satisfying sessions to boost cognitive skills.
- Card matching and pattern recall
- Logic puzzles and circuit challenges
- Math practice (addition, subtraction, etc.)
- Attention and reaction speed tests
- Daily challenges and streak building
- Leaderboards and reward collection
Read full descriptionHide full description
Make a few minutes count with BrainHero—a playful collection of quick, engaging brain training exercises designed for short, satisfying sessions. EXPLORE VARIED TRAINING • Card Match: find matching pairs, recall patterns, and recognize what you’ve seen. • Logic: sort cargo, connect circuits, and guide lasers through clever challenges. • Math: practice addition, subtraction, multiplication, division, and number-based exercises. • Attention & reaction: respond to signals, spot targets, and react at the right moment. BUILD YOUR HERO JOURNEY Complete training sessions to earn XP and level up through a colorful journey. Return for a fresh Daily Challenge, build your streak, and follow the playful BrainHero mascot along the way. TRAIN YOUR WAY Choose a category and difficulty, then jump into short exercises that fit easily into a break or quiet moment. Aim for better results, collect rewards, and climb the leaderboard whenever you want an extra challenge. BrainHero is designed for entertainment and skill-based practice. It does not provide medical advice or promise improvements to intelligence or health. ### Subscription Details - Payment: Charged to your iTunes account at confirmation of purchase. - Auto-renewal: Subscription renews automatically unless turned off at least 24 hours before the end of the current period. - Renewal charge: Your account is charged within 24 hours before the end of the current period. - Manage subscription: You can manage subscriptions and turn off auto-renewal in Account Settings after purchase. - Cancellation and refunds: Managed directly by the store. - Free trial: Any unused portion of a free trial is forfeited after purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.kai7.app/p/privacy-policy-no-tracking.html
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
Read full descriptionHide full description
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. ALL 88 CONSTELLATIONS, BEAUTIFULLY DRAWN Not just the famous dozen. Every IAU constellation, each with classic hand-painted artwork warped onto the real stars — so you see the Hunter, the Swan and the Scorpion laid over the sky exactly where they belong. 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 THE BIG SCREEN Optimised for iPhone Duo. On its inner display — or an iPad or Mac — details open in a panel beside the sky rather than over it, and the sky re-aims so what you tapped stays in view. Half-fold the Duo and the layout splits along the hinge itself. 5,000+ VERIFIED SPACE FACTS A new one every day, every one fact-checked. Share beautiful cards of your favourites. PRINTABLE STAR CHARTS Generate a proper A4 star chart for tonight and your exact spot, then print it. Designed for paper — black on white, sized for a classroom handout. SKY QUIZ Three levels, from Explorer to Astronomer. Every question is built from the real sky, and every answer has a "show me" button that points you at it. NIGHT PHOTOGRAPHY PLANNER When it gets properly dark, when the Moon is out of the way, when the Milky Way core rises, and how long you can expose before the stars trail. ASK SIRI "What's the moon phase?" "What's up tonight?" Answered on your device, without opening the app. TIME TRAVEL Scrub forwards or back — tonight, next month, ten thousand years. Watch the sky wheel, eclipses arrive, and the constellations slowly deform as the stars drift apart. 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. Available free through Apple School Manager and Volume Purchase. Teachers: the whole sky, the phases, the seasons, the scale of the solar system — demonstrable in seconds on any iPhone or iPad in the room. ALSO INSIDE • Tonight — ISS passes, meteor showers, conjunctions, what's up now • A moon-phase view that finally explains why phases happen • Real photography of planets, nebulae and galaxies • Dark-sky finder and live stargazing conditions • Home-screen widget: tonight's sky, moon phase, daily fact • Night-vision red mode to protect your dark adaptation • Metric or imperial, your choice 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.
Screenshots
Verdict
The clearest difference is rating: BrainHero at 5.0 against Stargazer's 3.0. BrainHero also leads on update cadence (every 2 days vs weekly) and iOS requirement (17.0 vs 26.0). Stargazer's advantage is monetization model (free vs free with in-app purchases) and device support (3 vs 1). 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.
BrainHero holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively.
BrainHero ships an update every 2 days, Stargazer weekly. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.
| Parameter | BrainHero | Stargazer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 5 — better | 2 |
| Update frequency | Every 2 days — better | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, iPad, Mac — better |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 49 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Kai Chi Tsao | Kendal Slack |
Customer experience
BrainHero
Stargazer
In-app purchases
BrainHero
No in-app purchases
Stargazer
No in-app purchases









