Comparison

Viewport 3D vs Stable Diffusion

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

Head to head
About

Viewport 3D

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Viewport is a fast, focused 3D viewer built for artists. Open models straight from the Files app on iPhone or iPad β€” iCloud Drive, Google Drive, Dropbox, OneDrive, Downloads or AirDrop β€” and inspect them in a clean, professional viewport. No account. No cloud. No clutter. OPEN ALMOST ANYTHING β€’ USD family + Reality load natively: USDZ, USD, USDA, USDC, .reality β€’ OBJ, STL and PLY β€’ FBX, glTF, GLB, DAE and 20+ more formats via an in-app importer β€’ Pick a model and its texture files together to keep materials INSPECT LIKE A PRO β€’ Smooth orbit, pan, pinch-zoom and double-tap to frame β€’ Studio lighting presets + intensity, multiple backgrounds (studio, blueprint, gradient, checker…) β€’ Render channels: shaded, albedo, normals, roughness and UVs β€’ Turntable auto-spin and a reference ground grid β€’ Scene info: bounding box, dimensions, vertex/triangle/material/texture counts β€” real values, never faked ANIMATION β€’ Plays node/transform animation and skeletal (bone) skinning on supported models β€’ Simple play / pause / loop transport AR β€’ Place supported static models on real surfaces β€’ Real World and Studio lighting modes β€’ Stable placement, flexible scaling and grounding shadows MORE β€’ Capture a screenshot and share it β€’ Recent files with search, sorting, date grouping and thumbnails β€’ Adaptive layouts and multitasking support on iPad PRIVACY FIRST All 3D processing happens on your device. Viewport has no accounts, no tracking, no ads, and never uploads your files. Made by Reimagine Fx. More formats and tools coming.

About

Stable Diffusion

Features
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Stable Diffusion: AI 3D creator turns an idea or one source image into a usable 3D asset. Create from text in any supported language, or upload a clear image of an object or character. Choose an optional visual style, generation quality, and output profile while seeing the exact credit cost before you begin. Built for real workflows: β€’ Text to 3D and image to 3D β€’ Optional AI-created source image when you do not have one β€’ Optional styles that guide appearance without replacing the subject β€’ Quality choices shown without technical provider names β€’ Local model library with preview, share, re-download, and delete β€’ Exports for web, Apple AR, games, 3D editing, and 3D printing β€’ Transparent credits, fair-use limits, and automatic refunds for confirmed failures No account is required. Glayzer Studio does not keep a copy of submitted photos or store model files on its servers. Prompts and optional source images are securely sent to AI providers only to perform the generation. StoreKit handles purchases, and the app does not use advertising trackers. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel in your Apple Account subscription settings. Weekly, monthly, and annual plans include recurring credits. Active members can purchase optional extra credit packs; purchased extra credits do not expire and remain usable after membership ends. Stable Diffusion AI 3D Creator & AI Photo Creator Results from generative AI can vary. You are responsible for content you submit and for confirming that an output is suitable for your intended use. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Viewport 3D4 screens
Stable Diffusion4 screens

Verdict

The call

The clearest difference is in-app purchases: Viewport 3D at none against Stable Diffusion's 5. Stable Diffusion's advantage is update cadence (every 6 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Stable Diffusion sells 5 in-app purchases, starting at $5.99 per 7 days. Viewport 3D asks for nothing beyond the download.

UpkeepUpdate frequency

Viewport 3D ships an update every 2 weeks, Stable Diffusion every 6 days. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

Scorecard2 real differences Β· 4 level
Viewport 3D versus Stable Diffusion: the parameters behind the verdict, then further details
ParameterViewport 3DStable Diffusion
PriceFreeFree
Update frequencyEvery 2 weeksEvery 6 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad β€” betteriPhone
Requires iOS17.017.0
Further details β€” not scored
Size47 MB15 MB
Age rating4+9+
DeveloperAmar ShindeGlayzer LLC

In-app purchases

None

Viewport 3D

No in-app purchases

5 purchases

Stable Diffusion

Subscriptions2
  • 3D Studio Weekly$5.997 Days
  • 3D Studio Annual$299.991 Year
One-time3
  • 100 Credits$4.99
  • 300 Credits$14.99
  • 800 Credits$39.99

Questions

Is Viewport 3D free?
Viewport 3D is free to download, with no in-app purchases.
Is Stable Diffusion free?
Stable Diffusion is free to download, with in-app purchases available.
Do Viewport 3D or Stable Diffusion have ads?
Neither Viewport 3D nor Stable Diffusion shows ads.
Which is updated more often, Viewport 3D or Stable Diffusion?
Viewport 3D ships an update every 2 weeks, and Stable Diffusion every 6 days. Most recently, Viewport 3D was updated on October 5, 2026 and Stable Diffusion on October 7, 2026.

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