Comparison

STL Simple Viewer vs Modo

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

Modo

Features
Read full description

MODO is your physical key for digital focus. Tap your MODO card to your iPhone and every app that drags you out of flow is instantly locked – Instagram, TikTok, YouTube, games, whatever your weak spot is. When you’re truly done, tap again and everything’s back. No passwords you set for yourself. No timers you swipe away. Just you, your card, and real focus. HOW IT WORKS • Pick the apps and websites you want blocked • Build your modes: Deep Work, Study, Evening, Workout • Tap your MODO card to your iPhone – locked • Tap again – unlocked WHY MODO • Physical friction beats willpower • Powered by Apple Screen Time – stable and native • Schedules for recurring focus blocks • Emergency codes for real exceptions (limited on purpose – friction is the point) • Weekly stats so you see the time you got back WHO IT'S FOR Students, knowledge workers, creators, parents – anyone tired of the endless scroll who wants their attention back. YOUR DATA Everything stays on your device. No tracking, no cloud login, no ads. Note: MODO requires a MODO NFC card (sold separately), iOS 17, and an iPhone with NFC. What's New (1.0) Hello world. This is MODO 1.0 – your first real focus key. We’d love your feedback.

Screenshots

STL Simple Viewer4 screens
Modo4 screens

Verdict

The call

The clearest difference is in-app purchases: Modo at none against STL Simple Viewer's 4. Modo also leads on ads (none vs shown) and update cadence (every 3 days vs every 5 months). 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. STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days. Modo asks for nothing beyond the download.

UpkeepUpdate frequency

STL Simple Viewer ships an update every 5 months, Modo every 3 days. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 7 level
STL Simple Viewer versus Modo: the parameters behind the verdict, then further details
ParameterSTL Simple ViewerModo
PriceFreeFree
Rating4.3 (909 ratings) — better—
Positive reviews18.1% of reviews—
Number of ratings909 — better—
Update frequencyEvery 5 monthsEvery 3 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size19 MB10 MB
Age rating4+4+
DeveloperVictor BovioAppRise UG (haftungsbeschränkt)

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

Modo

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
None

Modo

No in-app purchases

Questions

Is STL Simple Viewer free?
STL Simple Viewer is free to download, with in-app purchases available.
Is Modo free?
Modo is free to download, with no in-app purchases.
Do STL Simple Viewer or Modo have ads?
STL Simple Viewer shows ads; Modo does not.
Which is updated more often, STL Simple Viewer or Modo?
STL Simple Viewer ships an update every 5 months, and Modo every 3 days. Most recently, STL Simple Viewer was updated on October 14, 2026 and Modo on October 13, 2026.

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