Comparison

3D Model Viewer vs Tarja

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

Head to head
About

3D Model Viewer

View and interact with various 3D model formats in both AR and 3D modes. This intuitive tool supports local and cloud documents, custom backgrounds, and shadow casting. Easily import models via multiple methods and share your creations.

Highlights
  • AR and 3D viewing modes
  • Supports numerous 3D file formats
  • Local and cloud document integration
  • Customizable backgrounds and shadows
  • Model information display (size, volume, etc.)
  • Multiple import and sharing options
Features
Read full description

An advanced 3D model viewer for viewing all kinds of 3D models. Featuring AR viewing, custom rotation pivot and exploded assembly view. Preview mesh models including OBJ, STL, STP, DAE, PLY and Blend, supporting rendering, animation playback, 3D printing and model data inspection. Features 1. Support AR and 3D viewing modes. 2. Customizable background and environment lighting. 3. Animation preview for GLB, GLTF, FBX and more formats. 4. Real-time shadow casting. 5. Local & cloud document management (iCloud, DropBox, etc.). 6. Set custom rotation pivot point for model viewing. 7. Exploded view function to separate assembly parts. 8. Wide format support: STP, STEP, BERP, IGES, 3DS, OBJ, GLB, GLTF, STL, SLC, 3MF, PLY, OFF, DAE, Blend, FBX, USDZ, MD2, MD3, MD5, MDL, MS3D, DXF, X Read packaged archives containing models, MTL files and textures: ZIP, RAR. 9. Multiple import ways: iTunes File Sharing, AirDrop, iCloud, email attachments, web download. 10. File sharing via AirDrop or Email. 11. Capture, share and save screenshots. 12. Auto rotation and full-screen viewing mode. 13. Display model metrics: dimensions, volume, surface area, vertex count and triangle count. 14. Folder management in the file browser. If you have any suggestions or questions, please email belighten@gmail.com. Thank you for your support!

About

Tarja

Features
Read full description

Tarja translates your voice in real-time. Speak naturally in your language — Tarja transcribes, translates, and speaks the translation aloud. INTERPRETER MODE Solo: Translate what you're hearing — lectures, conversations, media. Hold the button, speak, and hear the translation instantly. Conversation: Face-to-face bilingual conversations. Each person speaks their language, and both hear the translation in real-time. INTENT CALLING Call your contacts with a reason attached. The recipient sees why you're calling before they answer. Calls are fully translated in real-time so each person hears the other in their own language. TRANSLATED MESSAGING Send text or voice messages that are automatically translated to the recipient's language. Play the original or the translation. KEY FEATURES Real-time speech-to-speech translation 60+ languages supported Solo and Conversation interpreter modes Intent Calling with translated call reasons Voice and text messaging with auto-translation Auto-detect spoken language Call history with full transcripts and AI summaries Add contacts via QR code, email, or invite link Do Not Disturb mode Dark and light themes PRIVACY FIRST All processing runs on private servers — your conversations are never sent to third-party cloud APIs. Audio is processed and discarded. Built by Sahouri Consulting LLC.

Screenshots

3D Model Viewer3 screens
Tarja4 screens

Verdict

The call

The clearest difference is in-app purchases: Tarja at none against 3D Model Viewer's 5. Tarja also leads on ads (none vs shown). On price, device support and iOS requirement 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 Model Viewer sells 5 one-off in-app purchases. Tarja asks for nothing beyond the download.

Scorecard2 real differences · 8 level
3D Model Viewer versus Tarja: the parameters behind the verdict, then further details
Parameter3D Model ViewerTarja
PriceFreeFree
Rating4.2 (328 ratings) — better—
Positive reviews59.2% of reviews—
Number of ratings328 — better—
Update frequencyEvery 3 weeks—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size28 MB32 MB
Age rating4+4+
Developer健 钟Tim Sahouri

Bugs and requests

3D Model Viewer

Reported bugs

3 issues
  • App crashes when trying to delete models
  • Cannot open .3mf and .glb files
  • Texture and shading issues with some models

Requested features

4 requests
  • Add support for more 3D file formats
  • Improve model rendering quality
  • Implement better file management options
  • Provide more customization and control over model view

Tarja

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

3D Model Viewer

One-time5
  • Remove Ads$1.99
  • Model & Screenshot Output$1.99
  • Background from Album$1.99
Show 2 more
  • Large File Model$1.99
  • All Features$5.99
None

Tarja

No in-app purchases

Questions

Is 3D Model Viewer free?
3D Model Viewer is free to download, with in-app purchases available.
Is Tarja free?
Tarja is free to download, with no in-app purchases.
Do 3D Model Viewer or Tarja have ads?
3D Model Viewer shows ads; Tarja does not.

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