Comparison

STL Viewer vs Gcode Viewer & Simulator

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

Head to head
About

STL Viewer

Features
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View STL 3D models and prepare them for 3D printing on your iPhone or iPad. Built for makers, engineers, designers, and 3D printing enthusiasts who need to open, inspect, measure, and export 3D mesh files with precision. KEY FEATURES UNIVERSAL STL SUPPORT • STL (binary and ASCII) • High-poly mesh handling • Fast file opening from Files app, share sheet, or AirDrop • Direct import from Thingiverse, Printables, MakerWorld, and other 3D model sites PRECISION MEASUREMENT TOOLS • Distance measurement between any two points on the mesh • Angle measurement across three vertices • Bounding box with exact X, Y, Z dimensions • Measurement units: mm, cm, inches PROFESSIONAL 3D INSPECTION • Solid and wireframe render modes • Smooth orbit camera with pinch-to-zoom, pan, and rotate gestures • Floor grid overlay for scale reference • Customizable model color • Real-time lit shading with directional and ambient lighting EXPORT & SHARE • Export to OBJ, DAE, and DXF formats • Capture high-resolution screenshots of any view • Share directly to Prusa Slicer, Bambu Studio, Creality Print, and other slicers • Preserve mesh integrity across exports PERFECT FOR • 3D printer owners checking models before slicing • Engineers inspecting CAD exports as STL • Designers reviewing client meshes on the go • Makers browsing Thingiverse, Printables, MakerWorld files • Students learning 3D modeling and printing • Anyone who needs to view STL files without a desktop PRECISION VIEWER • Hardware-accelerated 3D rendering • Infinite pinch-to-zoom for detailed inspection • Smooth gesture controls for any model size • Handles models with hundreds of thousands of triangles PRIVACY FIRST • All processing happens entirely on-device • No internet connection required • Your files never leave your device • Works completely offline — 100% private and secure Download now and inspect your STL files with professional-grade precision. Privacy Policy: https://nagy-legal.vercel.app/stl-viewer/privacy.html

About

Gcode Viewer & Simulator

Features
Read full description

Open any gcode file and see exactly what your 3D printer will print — before you start. Gcode Viewer renders the complete toolpath in 3D: rotate, zoom and pan the model, scrub through every layer, and measure real distances in millimetres. WHAT YOU CAN DO • Open gcode from your slicer, Files, iCloud or a share sheet • View the print in 3D — top, front, side and ISO • Scrub the layer slider to check the print builds correctly • Measure distances and the print height • See print time, filament weight and cost estimates • Follow a running print layer by layer Built for makers who want to check a file before committing filament and time. SUBSCRIPTION Opening your own files requires a subscription. The bundled sample model is free to view. • Pro Weekly — full access, billed every week • Pro Monthly — full access, billed every month • Pro Yearly — full access, billed once a year Subscriptions renew automatically. Cancel anytime in your App Store settings. Terms: https://codigitalsolutions.com/terms Privacy: https://codigitalsolutions.com/privacy

Screenshots

STL Viewer4 screens
Gcode Viewer & Simulator4 screens

Verdict

The call

STL Viewer and Gcode Viewer & Simulator are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. STL Viewer sells 1 one-off in-app purchase and Gcode Viewer & Simulator sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
STL Viewer versus Gcode Viewer & Simulator: the parameters behind the verdict, then further details
ParameterSTL ViewerGcode Viewer & Simulator
PriceFreeFree
Update frequencyEvery 11 days—
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size39 MB38 MB
Age rating12+4+
DeveloperMohamed NagyCODIGITAL SOLUTIONS

In-app purchases

1 purchases

STL Viewer

One-time1
  • Lifetime$9.99
3 purchases

Gcode Viewer & Simulator

Subscriptions3
  • Weekly$2.997 Days
  • Monthly$4.991 Month
  • Yearly$29.991 Year

Questions

Is STL Viewer free?
STL Viewer is free to download, with in-app purchases available.
Is Gcode Viewer & Simulator free?
Gcode Viewer & Simulator is free to download, with in-app purchases available.
Do STL Viewer or Gcode Viewer & Simulator have ads?
Neither STL Viewer nor Gcode Viewer & Simulator shows ads.

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