Comparison

3D Model Viewer vs TimeISpent

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

TimeISpent

Features
Read full description

TimeISpent is the activity tracking app designed for freelancers, consultants, and employees who manage multiple projects and juggle several professional situations every day. REAL-TIME TRACKING Start a timer in 2 taps on any project. Pause, resume, and stop your sessions with ease. Pause time is calculated automatically. Retroactively edit the start time if you forgot to launch the timer. Set up automatic session stop at end of day. POLISHED PROJECT MANAGEMENT Create and organize your projects with names, descriptions, and planned dates. Categorize and view all your work sequences by project with a built-in calendar (daily, weekly, monthly views). Configure a planning horizon for your future sessions. DETAILED WORK SESSIONS Add notes, images (built-in camera capture), and customizable categories to each session. Each category has its own color and icon. View your images fullscreen with zoom. Exclude specific sessions from reports if needed. SMART PROJECT SWITCHING Switch projects during your day with 3 modes: Save your sequence and start a new one on another project in 1 click, Change projects on the fly, or Pause on a project and save your interruption on another project. HISTORY AND FILTERING Browse your history by week, month, or year. Filter by project or category for a focused view of your activity. PROFESSIONAL REPORTS Export your data to PDF with period-specific layouts (daily, weekly, monthly, yearly). Customize table columns, add your logo and company colors. Also export to CSV with encoding options and international formats. Preview your reports before sharing. INTERACTIVE WIDGET AND LIVE ACTIVITY Access your 4 favorite projects from the home screen. Start, pause, or switch projects in 1 click. Track your active session on the lock screen and Dynamic Island (iPhone 14 Pro+). Custom branding in the widget. SYNC AND BACKUP Control and secure where your data lives: locally on each device, or synced and shared on iCloud automatically across all your Apple devices. Complete backup system in JSON format: export and restore your data (projects, sessions, categories, images) safely. MULTI-PROFILE Manage multiple user profiles with complete data and settings isolation. You work as a freelancer and also within a company. Switch profiles as you wish and share a customized activity report in both cases. START YOUR DAY ON YOUR IPHONE, FINISH ON YOUR MAC Thanks to iOS compatibility, TimeISpent works on your Mac. Record your activity during the day on your iPhone. Then review, adjust, and enrich your descriptions later on your Mac. From there, you can access reporting in HTML format. YOUR PRODUCTIVITY HAS NO LIMITS Do you use the Apple Shortcuts app? Integrate TimeISpent activities to optimize your daily workflow. PRICING TimeISpent is free with essential features to get you started, but limited in data volume. Try all Pro features free for 7 days, no commitment, no credit card required. The Pro subscription unlocks everything with no limits: unlimited projects and categories, professional PDF export, full backup, advanced switching, widget favorites, and more. - Pro Monthly: $2.99/month - Pro Yearly: $24/year Built with SwiftUI for a native and fluid experience. Compatible with iPhone, iPad, and Mac in iOS compatibility mode. Website: https://bd2db.app/timeispent Privacy Policy: https://bd2db.app/timeispent/policy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

3D Model Viewer3 screens
TimeISpent4 screens

Verdict

The call

The clearest difference is device support: 3D Model Viewer at 4 against TimeISpent's 2. 3D Model Viewer also leads on iOS requirement (15.6 vs 18.5). On price, update cadence, ads and in-app purchases 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 and TimeISpent sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. Both last shipped on October 25, 2026.

Scorecard2 real differences · 8 level
3D Model Viewer versus TimeISpent: the parameters behind the verdict, then further details
Parameter3D Model ViewerTimeISpent
PriceFreeFree
Rating4.4 (361 ratings) — better—
Positive reviews20.5% of reviews—
Number of ratings361 — better—
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Vision Pro — betteriPhone, iPad
Requires iOS15.6 — better18.5
Further details — not scored
Size17 MB11 MB
Age rating4+9+
DeveloperArthur Eduardo Skaetta Alvarez Desenvolvimento de Software LTDA.BD2DB

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

TimeISpent

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

3D Model Viewer

One-time1
  • Model Viewer Premium$1.99
2 purchases

TimeISpent

Subscriptions2
  • Pro - 1 month$2.991 Month
  • Pro - 1 year$22.991 Year

Questions

Is 3D Model Viewer free?
3D Model Viewer is free to download, with in-app purchases available.
Is TimeISpent free?
TimeISpent is free to download, with in-app purchases available.
Do 3D Model Viewer or TimeISpent have ads?
Neither 3D Model Viewer nor TimeISpent shows ads.
Which is updated more often, 3D Model Viewer or TimeISpent?
3D Model Viewer ships an update weekly, and TimeISpent weekly. Most recently, 3D Model Viewer was updated on October 25, 2026 and TimeISpent on October 25, 2026.

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