Sharp Eye Challenge vs GoBrain
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sharp Eye Challenge
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Sharpen your eyes and find the differences! Relax with a beautiful puzzle game that challenges your observation skills. In each level, you’ll see two similar images. Your mission is simple: spot all the differences before time runs out! Sounds easy? Look closer — some differences are harder to find than you think. Perfect for quick breaks or long relaxing sessions, this game is designed for players who enjoy casual brain training and visual puzzles. Plenty of Beautiful Levels Explore a wide collection of carefully designed images full of hidden differences. Challenge Your Observation Skills Train your brain and improve your focus while enjoying fun puzzles. Hint System Stuck on a tricky difference? Use hints to help you continue the level. Daily Rewards Play every day and collect rewards to help you progress faster. Relaxing Gameplay No complicated rules — just tap the differences and enjoy the game. Play Anywhere Great for short breaks, commuting, or relaxing before bed. Why You'll Love This Game • Simple and addictive gameplay • Improves attention to detail • Suitable for all ages • Beautiful images and smooth experience
GoBrain
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GoBrain is a clean, ad-free collection of brain and logic puzzles you can play completely offline. Open the Discover hub, pick a game, and start training your brain. PUZZLE GAMES INSIDE • 2048 — swipe to merge matching numbers and reach the 2048 tile. • Sudoku — fill every row, column and 3×3 box with 1–9. 100+ puzzles. • Zip — draw one continuous path through every cell, passing the numbered dots in order. 99 levels. • Patch — split the grid into rectangles so each number's region has the right size and shape (Shikaku-style). 99 levels. • Tango — fill the grid with two symbols so every row and column stays balanced and follows the clues. 99 levels. • Wend — trace hidden words through a grid of letters, using every tile exactly once. 99 levels. • Mend — restore the broken pattern by mirroring each tile back into symmetry. 99 levels. • Plus quick arcade breaks like Flap and a bubble shooter. WHY GOBRAIN • 100% offline — play anywhere, no internet needed. • No ads, no pop-ups, no tracking. Just the games. • Dozens of hand-tuned levels per puzzle, getting gradually harder. • A guided tutorial the first time you open each game. • Auto-saves your progress in every game. FEATURES • A Discover dashboard to browse and launch every game. • Dark, Light, and System themes. • 6 languages: English, Tiếng Việt, 한êµì–´, 䏿–‡, 日本語, العربية. • Settings screen: theme, language, and quick links. • Tiny download, instant to start. Simple to learn, hard to master — perfect for a quick break or a long focus session. GOBRAIN PLUS (OPTIONAL) GoBrain Plus unlocks the full Brain Index with its 60-day trend, the Daily Archive, double coins, half-price shop items and exclusive tile skins. It is available as a one-time purchase or as a yearly auto-renewable subscription. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period; you can manage or cancel it any time in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://gobrain.fighttech.vn/privacy/
Screenshots
Verdict
Sharp Eye Challenge and GoBrain are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
| Parameter | Sharp Eye Challenge | GoBrain |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 4 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 100 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Thai Tran Hong | Tran Trung Hieu |
In-app purchases
Sharp Eye Challenge
No in-app purchases
GoBrain
No in-app purchases
Questions
Is Sharp Eye Challenge free?
Is GoBrain free?
Do Sharp Eye Challenge or GoBrain have ads?
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