QuackyBrush vs COSMOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QuackyBrush
Create and paint 3D models using intuitive tools and primitives. Sculpt characters, props, or geometric art, then bring them to life with color. Save your creations and render them in scenes.
- Place and manipulate 3D primitives
- Negative-space carving
- Group and pre-bake model components
- Mirroring for symmetry
- Direct surface painting
- Scene creation with lighting
- AR placement
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QuackyBrush 3D is a freestyle 3D modeler and painter. Tap to place primitives — sphere, ellipsoid, cylinder, capsule, cone, frustum, torus, box. Move, resize, rotate, mirror, group, and carve them into anything you can picture. When the shape is right, bake to fuse the primitives into a single smooth model. Then paint directly on the surface. Save as a Creation. Place it in a Scene with a movable light and other models. Render the scene to your camera roll. Built for everyone - ideal for 7+ (kids who play Minecraft/Roblox or other 3D games performed well in UX testing). The interface respects your time. Drag-first input on top of an SDF + smooth-min CSG engine. Premium creative ownership - buy once, no subscription. What you can make. Stuffed animals, cute characters, low-poly game assets, 3D-print-ready props, game mascots, geometric sculpture, snowmen, ducks, chess pieces, mushrooms, robots. The primitive set composes into more than its parts. Negative-space carving. Switch any primitive to Carve mode and it becomes a subtractive ghost - eye sockets, mouth slots, embossed details, cavities. Smooth-min CSG fillets the boundary so carves feel hand-shaped, not Boolean-clean. Groups + pre-bake. Build a head, group its parts, pre-bake the group into a single fused unit. Drag the head as one piece while you keep adding to the body. Mirror. X, Y, or Z. Place one ear, get the other automatically. Place one eye, get the second symmetric. Free trackball rotate. Drag in any direction - the model rotates around the axis perpendicular to your finger. Need axis-locked rotation? Switch to X / Y / Z sub-tools. Orthographic toggle: Faux-orthographic camera for design-grade views.
COSMOS
Explore a real-time 3D model of the solar system, accurately depicting planet positions based on orbital mechanics. Zoom in on celestial bodies, control time to view past or future sky events, and learn details about each planet. This app offers an ad-free, offline experience with a one-time purchase.
- Real-time planet and moon positions
- Scrub through time for past/future views
- Photo-realistic textures
- Adjustable time scale
- Free exploration with pinch and swipe
- Detailed information on celestial bodies
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COSMOS is a solar system you hold in your hand. This is not a decoration. Every planet sits exactly where it is right now, computed from real orbital mechanics. Where is Jupiter tonight? How are Saturn's rings tilted? Open the app — the answer is there. - REAL ORBITS Positions of all 8 planets and the Moon are computed from Keplerian orbital elements in real time. Scrub through time to see the sky 10 years from now — or the day you were born. - PHOTO-REAL TEXTURES Saturn's rings, Jupiter's Great Red Spot, sunspots and solar granulation — every texture is generated on your device and stays crisp as you zoom. - CONTROL TIME From one second = hours, to one second = years. Watch the Moon change phase and the planets trace their orbits with your own eyes. - EXPLORE FREELY Pinch and swipe from outside the solar system down to a planet's face. Tap any body for details. - DESIGNED WITH RESPECT - No ads, ever - No in-app purchases — one simple price - Works fully offline, on a plane or on a mountain - Collects zero personal data For curious kids asking "why?" For stargazers who want a quiet moment of awe. The real universe, in your pocket. LANGUAGES English, Japanese, Simplified Chinese, Korean, Spanish, French, German
Screenshots
Verdict
The clearest difference is monetization model: QuackyBrush at free against COSMOS's paid. COSMOS's advantage is iOS requirement (15.0 vs 18.0). On price, rating, ratings volume and ads 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.
On the App Store both sit at effectively the same score — 5.0 for QuackyBrush against 5.0 for COSMOS. Both are backed by a comparable volume of ratings — 3 and 3 respectively.
| Parameter | QuackyBrush | COSMOS |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (3 ratings) |
| Number of ratings | 3 | 3 |
| Update frequency | — | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Porter360, LLC | yuudai tasaki |
In-app purchases
QuackyBrush
No in-app purchases
COSMOS
No in-app purchases









