Grass Fire vs Area Sense Test
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Grass Fire
This educational app explores how the human brain interprets visual shapes. It's designed to help users understand the cognitive processes behind shape recognition and perception.
- Understanding shape interpretation
- Cognitive process exploration
- Visual perception testing
- Educational content
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Grass Fire helps players understand how our brains understand what shapes represent.
Area Sense Test
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Can you tell which shape has a larger area? Two shapes appear side by side — pick the one with more area. Shapes that look larger are not always larger. Five rounds of optical illusions and clever traps test your true spatial perception. [How It Works] - Two shapes are displayed side by side — tap the one with the larger area - After you choose, the actual area values are revealed - 5 rounds featuring circles, rectangles, triangles, scattered shapes, and L-shapes [5 Rounds Full of Tricks] - Large circle vs small circle (straightforward comparison) - Vertical rectangle vs horizontal rectangle (same area — a trap!) - Large triangle vs medium circle (triangle looks bigger but circle wins) - 8 small circles vs 1 large circle (scattered vs concentrated) - L-shape vs rectangle (complex shape comparison — L-shape is larger) [6 Result Types] - Area Eagle (5/5) - Perfect spatial sense - Sharp Instinct (4/5) - Outstanding area judgment - Decent Eye (3/5) - Average spatial perception - Tricked Eye (2/5) - Fooled by optical illusions - Intuitive Judge (1/5) - Going with gut feeling - Artistic Vision (0/5) - You see beauty, not area [Key Features] - 5-round area comparison test with optical illusions and tricks - Actual area values revealed after each answer - Share your result screenshot with friends - 8 languages supported Find out your spatial sense type and challenge your friends!
Screenshots
Verdict
The clearest difference is update cadence: Area Sense Test at daily against Grass Fire's every 15 months. Grass Fire's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Grass Fire ships an update every 15 months, Area Sense Test daily. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.
| Parameter | Grass Fire | Area Sense Test |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 15 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 66 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | arludo Pty Ltd | pilyeong heo |
In-app purchases
Grass Fire
No in-app purchases
Area Sense Test
No in-app purchases









