Comparison

STL Simple Viewer vs EarnTime

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

Head to head
About

STL Simple Viewer

Easily view and interact with 3D STL CAD models. Supports various file types and offers advanced rendering options for detailed analysis. Get model information and explore interiors with clipping planes.

Highlights
  • View ASCII and Binary STL files
  • Load STL from ZIP
  • Rotate, pan, and zoom
  • Orthogonal and Perspective modes
  • Model info (triangle count, bounding box)
  • Rendering options (faces, edges, transparency)
  • Clipping plane for interiors
Features
Read full description

STL Simple Viewer is a great app to quickly view STL, 3MF & DXF 3D files and export them to the most commonly used CAD formats. Features: - Supports STL files both ASCII and Binary formats. - Supports 3MF & DXF files. - Load files directly from ZIP archives. - Export to DXF, OBJ, DAE, PLY, USD, STL & 3MF. - Measure distances between points within your model. - Rotate, pan, and zoom models with intuitive touch controls. - Configure rendering options: faces, edges, points, background and transparency. - Render using a clipping plane (useful for viewing model interiors). - View models in Orthographic or Perspective mode. - Obtain model information including triangle count, bounding box, surface area, and volume. Privacy Policy: https://www.boviosoft.com/apps/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ For support or questions: support@boviosoft.com

About

EarnTime

This app intelligently blocks distracting applications by requiring users to earn screen time through physical activity. It offers workout immunity and allows unused time to roll over, promoting a healthier balance between digital habits and physical well-being.

Highlights
  • Earn screen time through physical activity
  • Workout immunity for active sessions
  • Intelligent app shielding
  • Screen-off audio doesn't count against time
  • Rest day grace period and reserves
  • Apple Watch and iOS widgets
  • 100% on-device privacy
Features
Read full description

Tired of doomscrolling? Earn your screen time through real movement. Intelligent app blocking that only counts true visual screen time: free background audio, workout immunity, and rest day reserves—with zero subscriptions and 100% on-device privacy. Most screen time blockers treat you like a child, forcing rigid locks that punish you for listening to music or working out. EarnTime is different. It seamlessly aligns your physical health with your digital habits: close your Apple Watch rings, earn minutes, and spend them without guilt. SMART SCREEN TIME: ONLY REAL USAGE COUNTS • Free Screen-Off Audio: Listening to YouTube, Spotify, or podcasts with your screen locked in your pocket? It won't cost you a single second. We detect display state and only count time when your eyes are actually on the screen. • Workout Immunity: Out for a run, cycling, or lifting at the gym? Monitored apps stay completely unlocked during active Apple Watch workout sessions. Never get locked out of your workout playlist or training log. • Exercise Adds Time: Each synced Exercise ring minute earns one minute of unlocked app allowance. Active movement above your daily baseline earns an extra bonus. • Keep Room for Rest: Real life happens. You start each day with a 30-minute grace period, backed by a 60-minute weekly reserve (up to 120 minutes) for rest days and recovery. • Intelligent Shielding: When your daily allowance and reserve run out, selected distracting apps are gently shielded until you get moving again. A GLANCE ON YOUR WRIST & HOME SCREEN • Apple Watch Companion: Check your live remaining allowance, reserve, and status directly from your wrist. • iOS Widgets: Beautiful Lock Screen and Home Screen widgets keep your balance visible at all times. • History & Marks: Track your weekly progress, celebrate streaks without punitive broken-streak penalties, and collect editorial weekly covers. WHY EARNTIME IS DIFFERENT • No Subscriptions: Free to start with 1 monitored app. Unlock up to 10 apps with a single, tiny $1.99 one-time purchase. Future core updates included forever. • 100% Private & Local: No accounts, no ads, no trackers, and no remote servers. Everything runs strictly on your device via Apple’s native Screen Time and HealthKit APIs. • Guilt-Free Balance: We don't believe in digital starvation. Unused daily time rolls over into your reserve, turning your screen time into a healthy, earned reward. COMPATIBILITY & NOTES Requires an iPhone with iOS 17.4 or later and Apple Watch Exercise ring data in Apple Health. Health read access and individual Screen Time authorization are required. The Apple Watch companion app requires watchOS 10.0 or later. Balance updates after exercise data syncs via HealthKit. Sync and callback frequency are managed by iOS.

Screenshots

STL Simple Viewer4 screens
EarnTime4 screens

Verdict

The call

The clearest difference is review sentiment: EarnTime at 100% against STL Simple Viewer's 18%. EarnTime also leads on rating (5.0 vs 4.3) and ads (none vs shown). STL Simple Viewer's advantage is ratings volume (918 vs 1). On price, in-app purchases, monetization model 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. STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days and EarnTime sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

EarnTime holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: STL Simple Viewer has 918 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 18% of STL Simple Viewer's written reviews are positive against 100% of EarnTime's.

UpkeepUpdate frequency

STL Simple Viewer ships an update every 5 months, EarnTime every 3 days. The most recent releases landed on October 26, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
STL Simple Viewer versus EarnTime: the parameters behind the verdict, then further details
ParameterSTL Simple ViewerEarnTime
PriceFreeFree
Rating4.3 (918 ratings)5.0 (1 ratings) — better
Positive reviews18.1% of reviews100.0% of reviews — better
Number of ratings918 — better1
Update frequencyEvery 5 monthsEvery 3 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS17.0 — better17.4
Further details — not scored
Size19 MB11 MB
Age rating4+4+
DeveloperVictor BovioHangfang Zhang

Customer experience

STL Simple Viewer

All ratings909 ratings
Positive80.3%
Neutral4.5%
Negative15.2%
Written reviews166 reviews
Positive18.1%
Neutral11.4%
Negative70.5%

EarnTime

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

STL Simple Viewer

Reported bugs

3 issues
  • App crashes when opening larger STL files
  • Inability to open some file formats
  • Ads continue to appear even after paying for ad removal

Requested features

3 requests
  • Add ability to save color/lighting settings
  • Improve stability and reduce crashes
  • Provide an ad-free paid version

EarnTime

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

STL Simple Viewer

Subscriptions2
  • Pro version (1 week plan)$0.997 Days
  • Pro version (1 month plan)3 Days trial$1.991 Month
One-time2
  • Remove Ads$2.99
  • Export Pack$3.99
1 purchases

EarnTime

One-time1
  • EarnTime Full$1.99

Questions

Is STL Simple Viewer free?
STL Simple Viewer is free to download, with in-app purchases available.
Is EarnTime free?
EarnTime is free to download, with in-app purchases available.
Which has better reviews, STL Simple Viewer or EarnTime?
EarnTime is rated higher. STL Simple Viewer averages 4.3 out of 5 from 918 ratings, while EarnTime averages 5.0 from 1 ratings.
Do STL Simple Viewer or EarnTime have ads?
STL Simple Viewer shows ads; EarnTime does not.
Which is updated more often, STL Simple Viewer or EarnTime?
STL Simple Viewer ships an update every 5 months, and EarnTime every 3 days. Most recently, STL Simple Viewer was updated on October 26, 2026 and EarnTime on October 9, 2026.

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