Comparison

3D Model Viewer vs Narrowstack CRM

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

Explore and interact with 3D models on your mobile device. Simulate the 3D printing process to identify potential issues before committing to a print. Visualize your models in augmented reality, adjusting scale and rotation within your real-world environment.

Highlights
  • View 3D models in real-time
  • Rotate, zoom, and paint models
  • Simulate 3D printing process
  • View models in AR mode
  • Adjust scale and rotation in AR
  • Supports multiple 3D file formats
Features
Read full description

Have you ever wanted to view and interact with 3D Models? 3D Model Viewer allows you to view compatible 3D Models using your mobile device. You can even simulate 3D Printing and view your model in AR mode! -- View 3D Models Import and view your 3D models in real time, rotating, zooming and painting! -- Simulate 3D Printing Watch a simulation of your model being 3D printed from bottom to top and identify any potential problems with the model without wasting any printing material! -- AR Mode View your 3D models inserted into the real world, being able to adjust scale and rotation! -- Compatible with many formats 3D Model Viewer supports the following formats: .stl, .obj*, .abc, .ply, .usdz, .usd, .usda, .dae *.obj files can be imported with textures in the format of a .zip file 3D Model Viewer is now available for all iOS devices!

About

Narrowstack CRM

Features
Read full description

Narrowstack is an all-in-one CRM and marketing platform for service-based businesses. It consolidates lead capture, customer communication, sales management, payments, and marketing into a single dashboard. Features Lead Capture Build landing pages, websites, forms, and booking calendars to collect leads. Contacts are automatically added to your CRM. Unified Inbox Manage conversations across SMS, email, phone, social media, and web chat from one place. Email & SMS Marketing Create and send email and text message campaigns. Set up drip sequences and broadcast messages to segmented contact lists. CRM & Pipeline Management Track contacts through customizable sales pipelines. View deal stages, assign tasks, and manage your sales process. Workflow Automation Build automated workflows triggered by events like form submissions, appointment bookings, or pipeline stage changes. Automate follow-ups, task assignments, and notifications. Invoicing & Payments Send invoices, collect payments, and manage billing. Integrates with Stripe, PayPal, and other payment processors. Reputation Management Send review requests, monitor reviews across platforms, and respond from a central dashboard. Courses & Memberships Create and host online courses, membership sites, and learning portals with gated content. AI Suite Conversation AI — Automated chat responses for web and SMS Content AI — Generate marketing copy, emails, and social posts Voice AI — AI-powered phone call handling Workflow AI — Intelligent automation suggestions Integrations Connects with 200+ third-party tools including Google, Facebook, Zapier, QuickBooks, and more.

Screenshots

3D Model Viewer3 screens
Narrowstack CRM3 screens

Verdict

The call

The clearest difference is in-app purchases: Narrowstack CRM at none against 3D Model Viewer's 1. Narrowstack CRM also leads on update cadence (every 2 days vs weekly). 3D Model Viewer's advantage is device support (4 vs 2). On price, ads 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 1 one-off in-app purchase. Narrowstack CRM asks for nothing beyond the download.

UpkeepUpdate frequency

3D Model Viewer ships an update weekly, Narrowstack CRM every 2 days. The most recent releases landed on October 25, 2026 and October 17, 2026 respectively.

Scorecard3 real differences · 7 level
3D Model Viewer versus Narrowstack CRM: the parameters behind the verdict, then further details
Parameter3D Model ViewerNarrowstack CRM
PriceFreeFree
Rating4.4 (361 ratings) — better—
Positive reviews20.5% of reviews—
Number of ratings361 — better—
Update frequencyWeeklyEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Vision Pro — betteriPhone, iPad
Requires iOS15.6 — better16.6
Further details — not scored
Size17 MB344 MB
Age rating4+4+
DeveloperArthur Eduardo Skaetta Alvarez Desenvolvimento de Software LTDA.Narrowstack LLC

Bugs and requests

3D Model Viewer

Reported bugs

10 issues
  • App crashes immediately after upload
  • App crashes when importing PLY files
  • App crashes after payment
  • App crashes when importing large files
  • App crashes on iPad Pro
Show 5 more
  • VR crashes
  • Model centering limits viewing
  • Paint function assigns random color
  • Incorrect AR sizing
  • Y axis is up in AR

Requested features

11 requests
  • Allow changing background color
  • Allow changing lighting positions
  • Add axis lock object rotation
  • Add way to rotate side to side (turntable)
  • Option to slow down rotation/movements
Show 6 more
  • Add arrange by recent for downloaded STLs
  • Add ability to list most recent STL at top
  • Allow models to scale larger in AR mode
  • Add free rotation
  • Improve AR sizing accuracy
  • Use Z axis as up for AR and print sim

Narrowstack CRM

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

3D Model Viewer

One-time1
  • Model Viewer Premium$1.99
None

Narrowstack CRM

No in-app purchases

Questions

Is 3D Model Viewer free?
3D Model Viewer is free to download, with in-app purchases available.
Is Narrowstack CRM free?
Narrowstack CRM is free to download, with no in-app purchases.
Do 3D Model Viewer or Narrowstack CRM have ads?
Neither 3D Model Viewer nor Narrowstack CRM shows ads.
Which is updated more often, 3D Model Viewer or Narrowstack CRM?
3D Model Viewer ships an update weekly, and Narrowstack CRM every 2 days. Most recently, 3D Model Viewer was updated on October 25, 2026 and Narrowstack CRM on October 17, 2026.

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