Comparison

STL Simple Viewer vs Read Master

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

Read Master

Features
Read full description

Open, view and manage all your documents quickly, without needing multiple apps installed. With Read Master you can open almost any file format: PDF, Word (DOC/DOCX), Excel (XLS/XLSX), PowerPoint (PPT/PPTX), TXT, P7M (digitally signed files), images, and many more. FEATURES: • Open PDF, DOC, DOCX, XLS, XLSX, PPT, PPTX, TXT and P7M files • Fast and lightweight file viewer • Built-in file manager to browse all documents on your device • Simple, clean and intuitive interface • Search for files by name or type • Recent files list for quick access • Share documents easily with other apps • Works offline, no internet connection required to view files • Supports digitally signed P7M documents, ideal for legal and administrative files Whether you need to check a PDF contract, review a signed P7M document, open an Office file sent by email, or simply browse the files stored on your phone, Read Master gives you a single, reliable tool to do it all. No clutter, no unnecessary permissions — just a fast, dependable document reader designed to make your daily file management easier. Download Read Master today and keep all your documents organized and accessible in one place! PDF EDITOR AND SIGNATURE: • Tap a line of text and rewrite it, right on the page • Add text with size, colour and bold • Whiteout, highlight, underline, strikethrough, shapes, free drawing • Draw your signature and drag it exactly where it belongs, resize it, add several • Fill in PDF forms and save them • Undo and redo, then save as a new PDF • Two compression levels: light (keeps the text) or strong (smaller scans) • Interface in 10 languages, right-to-left for Arabic Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://gist.github.com/alutori-lang/2ba10df05262d9141daa0c822b83bc20

Screenshots

STL Simple Viewer4 screens
Read Master4 screens

Verdict

The call

The clearest difference is update cadence: Read Master at weekly against STL Simple Viewer's every 5 months. On price, ads, in-app purchases 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 Read Master sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

STL Simple Viewer ships an update every 5 months, Read Master weekly. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard1 real difference · 9 level
STL Simple Viewer versus Read Master: the parameters behind the verdict, then further details
ParameterSTL Simple ViewerRead Master
PriceFreeFree
Rating4.3 (920 ratings) — better—
Positive reviews18.1% of reviews—
Number of ratings920 — better—
Update frequencyEvery 5 monthsWeekly — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size19 MB40 MB
Age rating4+4+
DeveloperVictor BovioAdnan riaz

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

Read Master

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
3 purchases

Read Master

Subscriptions2
  • Premium Monthly$3.991 Month
  • Premium Yearly7 Days trial$22.991 Year
One-time1
  • Premium Lifetime$24.99

Questions

Is STL Simple Viewer free?
STL Simple Viewer is free to download, with in-app purchases available.
Is Read Master free?
Read Master is free to download, with in-app purchases available.
Do STL Simple Viewer or Read Master have ads?
Both STL Simple Viewer and Read Master show ads.
Which is updated more often, STL Simple Viewer or Read Master?
STL Simple Viewer ships an update every 5 months, and Read Master weekly. Most recently, STL Simple Viewer was updated on October 29, 2026 and Read Master on October 24, 2026.

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