Comparison

3D Simplify vs Model Viewer | CAD Viewer

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

Head to head
About

3D Simplify

Features
Read full description

Too heavy to send, open or load in AR? 3D Simplify makes 3D models lighter on your device: fewer polygons, smaller textures, the same look. It opens LiDAR, photogrammetry and Object Capture scans as well as models from other apps, and exports a light USDZ, GLB or OBJ. Nothing is uploaded and there is no account to create. SEE WHERE THE SIZE IS Most 3D files are mostly textures. 3D Simplify shows how much of a file is textures and how much is geometry. When textures make up most of it, Compress Textures Only (Pro) shrinks them in one tap and keeps every face. WHO IT IS FOR • 3D scanning users whose LiDAR, photogrammetry or Object Capture results are too heavy to share or open in AR • AR, RealityKit and visionOS developers who need assets that load quickly in AR Quick Look • Game developers building LODs and trimming heavy props for real-time engines • Online stores and web teams shipping 3D product models that have to download fast • Engineers and designers turning machinery and CAD-style models into something an iPhone can show HOW IT WORKS 1. Open a model from the Files app, or drag it into the viewer on iPad and Mac. 2. Let Auto pick the reduction, or set a ratio, face count or file size (Pro). 3. Compare Original and Simplified side by side, shaded or in wireframe. 4. Export USDZ, or GLB and OBJ with levels of detail (Pro). FREE • Automatic smart reduction that picks the target polygon count for you • Viewer with shaded, untextured and wireframe views, side-by-side comparison and a frame button; the camera stays put when you switch • Live face count, file size and texture/geometry split • Preview in AR Quick Look before you share • USDZ export at the model's real-world size • Batch Reduce for a folder of up to 3 models at a fixed 50% reduction • Shortcuts action for your own automations • Interface in 9 languages, including English, Spanish, German, French and Russian 3D SIMPLIFY PRO • Reduce by ratio in 5% steps, by target face count or by target file size • Hard-surface mode: removes whole edge loops so cylinders and machinery stay round and evenly spaced instead of turning into slivers • Texture Size (Original, 1/2, 1/4) and one-tap Compress Textures Only • Re-bake Textures: re-wraps the textures onto the lighter mesh and keeps normal, roughness, metallic, transparency and glow maps. Up to 8K on Mac and on iPads with 16 GB of memory, 4K on iPads with 8 GB • Hausdorff quality reading and output validation after a re-bake • GLB and OBJ export, plus LOD0, LOD1 and LOD2 in one go • Saved Models Library • Unlimited files per batch run, with Texture Size and Re-bake FORMATS • Open: USDZ, USD, USDA, USDC, OBJ, STL, PLY, GLB, glTF, and ZIP files containing a model • Export: USDZ (free), GLB and OBJ (Pro) PRIVACY AND PERFORMANCE Everything runs on your device and the texture steps are Metal-accelerated. No account, no upload, no cloud - it works in airplane mode. PLEASE NOTE 3D Simplify makes a model you already have lighter. It is not a 3D scanner or a modelling app, and it does not remesh or repair broken geometry. Reducing a mesh always removes detail, so the side-by-side view is there for you to decide how much is acceptable. PLATFORMS iPhone and iPad (iOS/iPadOS 17 or later) and a native Mac app (macOS 14 or later). SUBSCRIPTION 3D Simplify Pro is an auto-renewing subscription: US$2.99 per month or US$19.99 per year (US pricing; your local price is shown before you confirm). Payment is charged to your Apple Account at confirmation of purchase. It renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period, and renewal is charged within 24 hours before the period ends. Manage or cancel any time in Settings > Apple Account > Subscriptions. Privacy Policy: https://mapohin.com/3dSimplifier/policy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Support: https://mapohin.com/3dSimplifier/support

About

Model Viewer | CAD Viewer

View and inspect 3D model files with ease. Import various formats, manipulate the view with intuitive controls, and access basic model information on a clear workspace.

Highlights
  • 3D model inspection
  • Import multiple file formats
  • Rotate, pan, and zoom controls
  • Toggle grid workspace
  • View basic model details
Features
Read full description

Model Viewer is an app for opening and inspecting 3D model files on a clean grid workspace. Import supported files from Files, rotate, pan, zoom, reset the view, toggle the grid, and review basic model details. Supported formats include STL, GLB, GLTF, USD, USDA, USDC, USDZ, OBJ, PLY, DAE, ABC, and SCN. MODEL VIEWER PRO Viewing models is free. Model Viewer Pro unlocks rendered, mesh wireframe, edges, and X-ray modes, clipping planes, studio backgrounds and lighting, favorites, folders, and a saved view for every model. Model Viewer Pro is an optional auto-renewable subscription, available monthly or yearly. Payment is charged to your Apple Account when you confirm the purchase. The subscription renews automatically unless it is canceled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. You can manage or cancel your subscription in your Apple Account settings after purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://greatminds-create.com/legal/model-viewer/privacy/

Screenshots

3D Simplify4 screens
Model Viewer | CAD Viewer2 screens

Verdict

The call

The clearest difference is update cadence: 3D Simplify at every 4 days against Model Viewer | CAD Viewer's every 2 weeks. 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. 3D Simplify sells 2 in-app purchases, starting at $2.99 per month and Model Viewer | CAD Viewer sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

3D Simplify ships an update every 4 days, Model Viewer | CAD Viewer every 2 weeks. The most recent releases landed on October 17, 2026 and October 19, 2026 respectively.

Scorecard1 real difference · 8 level
3D Simplify versus Model Viewer | CAD Viewer: the parameters behind the verdict, then further details
Parameter3D SimplifyModel Viewer | CAD Viewer
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 4 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size7 MB12 MB
Age rating4+4+
DeveloperPo hin MaAstonish Innovations

In-app purchases

2 purchases

3D Simplify

Subscriptions2
  • Reduce3D Pro Monthly$2.991 Month
  • Reduce3D Pro Yearly$19.991 Year
2 purchases

Model Viewer | CAD Viewer

Subscriptions2
  • Model Viewer Pro Monthly$1.991 Month
  • Model Viewer Pro Yearly$19.991 Year

Questions

Is 3D Simplify free?
3D Simplify is free to download, with in-app purchases available.
Is Model Viewer | CAD Viewer free?
Model Viewer | CAD Viewer is free to download, with in-app purchases available.
Do 3D Simplify or Model Viewer | CAD Viewer have ads?
Neither 3D Simplify nor Model Viewer | CAD Viewer shows ads.
Which is updated more often, 3D Simplify or Model Viewer | CAD Viewer?
3D Simplify ships an update every 4 days, and Model Viewer | CAD Viewer every 2 weeks. Most recently, 3D Simplify was updated on October 17, 2026 and Model Viewer | CAD Viewer on October 19, 2026.

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