Comparison

Castle Model Viewer vs Clayoo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Castle Model Viewer

View and interact with a wide range of 2D and 3D model formats. Explore models, play animations, and save screenshots. Supports various file types including glTF, X3D, and OBJ, with options to open ZIP archives containing models and textures.

Highlights
  • Supports glTF, X3D, VRML, IFC, Spine JSON, and more
  • Open ZIP files with models and textures
  • Change navigation types (walk, fly, examine, 2D)
  • Play animations
  • Save screenshots
  • Display scene statistics
Features
Read full description

Viewer for 3D and 2D model formats supported by the Castle Game Engine: - glTF - X3D - VRML - IFC - Spine JSON - sprite sheets (in Castle Game Engine, Cocos2D and Starling XML formats) - MD3 - Wavefront OBJ - 3DS - STL - Collada - and more. In addition to the above formats, it also allows to open a ZIP file that contains a single model and associated media (like textures, sounds etc.). You can change navigation type (walk, fly, examine, 2D), jump between viewpoints, play chosen animations, save a screenshot, display scene statistics (triangle, vertex count) and more. The application comes with a few sample files, and naturally you can open your own 3D and 2D model files. The models must be self-contained, e.g. you have to - use GLB with all the textures packed in one file, - or X3D with all textures expressed as PixelTexture or data URI, - or just put your model with data (like textures) inside a zip. - We have documented how to make your models self-contained here: https://castle-engine.io/castle-model-viewer-mobile This is an open-source software, available to you for free. There are no ads or tracking. We appreciate if you can support us: https://www.patreon.com/castleengine !

About

Clayoo

Features
Read full description

What if you could draw something and hold it in your hands almost? Clayoo is a creative canvas that bridges the gap between 2D sketches and 3D models. Draw anything using professional tools, tap a single button, and let AI transform your artwork into a fully textured, realistic 3D model, ready to rotate, explore, and even place in your room using augmented reality. No 3D modeling experience required. If you can draw it, Clayoo can build it. POWERFUL DRAWING TOOLS Clayoo gives you everything you need to bring your ideas to life on canvas. Choose from 5 distinct brush styles , Round, Flat, Marker, Pencil, and Spray, each with adjustable size and opacity. Add depth with gradient strokes and gradient fills in 4 directions. Use the intelligent flood fill to color regions with a single tap, respecting stroke boundaries automatically. QUICKSHAPE TECHNOLOGY Draw a shape and hold your finger down, Clayoo detects your intent and snaps it into a perfect circle, rectangle, triangle, or straight line. Inspired by professional illustration apps, QuickShape makes precise drawing effortless. MULTI-LAYER CANVAS Work across multiple layers to build complex compositions. Each layer has independent strokes and fills, letting you organize your artwork just like in a pro design tool. Rearrange elements with the shape selector to control what sits on top. AI-POWERED 3D GENERATION When you're ready, tap Generate. Clayoo sends your drawing to an AI engine that creates a fully textured 3D model complete with PBR (physically-based rendering) materials. Your model is delivered in USDZ format, Apple's native 3D file format, compatible across iPhone, iPad, Mac, and Vision Pro. VIEW IN 3D & AUGMENTED REALITY Explore your creation in an interactive 3D viewer, rotate, zoom, and inspect every angle. Then switch to AR mode and place your model on your desk, floor, or anywhere around you. See your sketch come to life in real space. CLOUD MODEL LIBRARY Every model you generate is automatically saved to the cloud. Open your library anytime to browse past creations, re-download models, and pick up right where you left off, even on a new device. SHARE YOUR CREATIONS Export and share your 3D models with friends, collaborators, or across your other apps. USDZ files work seamlessly with Messages, Mail, and any app that supports 3D Quick Look. WHO IS CLAYOO FOR? Whether you're an artist experimenting with 3D, a hobbyist who loves to sketch, a game designer prototyping characters, or just someone curious about turning flat drawings into something you can spin around, Clayoo was made for you. Draw it. Generate it. Explore it. Place it in your world.

Screenshots

Castle Model Viewer4 screens
Clayoo3 screens

Verdict

The call

The clearest difference is iOS requirement: Castle Model Viewer at 13.0 against Clayoo's 18.0. 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 7 level
Castle Model Viewer versus Clayoo: the parameters behind the verdict, then further details
ParameterCastle Model ViewerClayoo
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.0
Further details — not scored
Size72 MB14 MB
Age rating4+4+
DeveloperMICHALIS KAMBURELISRahul Sehgal

In-app purchases

None

Castle Model Viewer

No in-app purchases

None

Clayoo

No in-app purchases

Questions

Is Castle Model Viewer free?
Castle Model Viewer is free to download, with no in-app purchases.
Is Clayoo free?
Clayoo is free to download, with no in-app purchases.
Do Castle Model Viewer or Clayoo have ads?
Neither Castle Model Viewer nor Clayoo shows ads.

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