Comparison

CASA Space Frame 3D vs Sketch Viewer UP

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

Head to head
About

CASA Space Frame 3D

This app enables structural engineers to perform static and dynamic elastic analysis of 3D space-frames. It offers quick and precise modeling with graphical interaction, providing numerical and graphical results for deflections, forces, and mode shapes.

Highlights
  • Linear static analysis
  • Non-linear static analysis (P-Delta)
  • Dynamic analysis (natural modes, footfall)
  • Extensive section and material libraries
  • Graphical interactive results
  • Metric & imperial units
Read full description

Structural / Civil Engineering App for static & dynamic elastic analysis of general 3D space-frames. With CASA SF-3D an engineer can create 3D structural models of space-frames and obtain both the numerical results and graphical representation of the deflections, forces, natural frequencies, and mode shapes. There is an emphasis on quick and precise modelling with graphical interaction. Results are graphically interactive with a sliding readout of numerical results at any point along a member. More information about this App can be found in its integrated help and on our website. The App also contains "Replay Demonstrations" which describe and enact its use. === This App includes the following features: * Linear static analysis. * P-Delta non-linear static analysis. * Natural mode dynamic analysis. * Footfall dynamic analysis. * Sway-cases. * Geometry groups: - Include or exclude geometry from the analysis. - Groups can be combined into supergroups. * Multi-copying for rapid generation of regular geometry. * Rotation and reflection of geometry. * Solid rendering of geometry: - Member cross-sections drawn to scale. - Colour-coded by groups. * Viewpoint memories: - Store and recall for quick navigation. * Members can be oriented to a third node. * Gravity (self-weight) loading. * Factored load-case combinations. * Rubber-band box for large-area selection. === General Technical Features === * Automatic analysis. * Integrated extensive section library: - British, European, American, Canadian, Australian, South African, Japanese, Russian. - See our website for the range of shapes. * Integrated section generator for common shapes: - Open: I/H, channel, zed, angle, tee. - Hollow: Oval, Rectangular. - Solid: Oval, Rectangular. - Calculates: Area, Inertia, Torsional constant, Elastic moduli, mass. * Integrated material library: - Steel, Aluminium, Concrete, Timber, Glass. - User materials can be added. * Member ends can be rigid or pinned. * Loads applied as point, couple, trapezoid. * Multiple load-cases. * Statics results include: - Reactions, deflections, bending moments, shear forces, bending stress. - Points of interest. - Results given all along members. * Dynamic analysis considers self weight plus additional mass-cases. * Dynamic results include:   - Resonant frequencies   - Undamped oscillation mode shapes * Footfall results include: - Response factors. - Critical frequencies. - Both impulse and resonant responses. === General User Interface Features === * Universal App - for iPhone, iPod touch, and iPad. * Metric & imperial units. * Four simple interactive screens: - Geometry, Loading, Results: for interacting with the model. - Utilities: Supplementary functions (see below). * Easy modelling: - Tap to select; tap to edit. - Move and copy geometry. - Slide nodes along members. - Change member spans. - Split members. - Replicate loading across members. * Graphical drag-and-tap controls: - Rotate, pan, zoom the view with simple gestures. - Drag nodes for positions. - Drag loads for positions and magnitudes. - Drag marker along member to read off results values. - Tap on Points of Interest for important results.  - Select nodes to measure distances, angles, and areas between them. * Numeric entry available: - Double-tap on a datum to enter its numerical value. - Includes a convenient built-in calculator. * Straightforward section library: - Pick from country, shape, and size. - View diagram and properties. - For custom shapes, double-tap on dimensions to edit. - Axes can be rotated by 90 degrees. * Report generation: - Configurable content. - Graphical layout. - On-screen preview. - Export PDF by e-mail. - AirPrint. - CSV export of numerical data. * Supplementary functions: - Document titles. - Choice of unit system (UK/EU Metric, US Imperial). - On-line help. - Load, save, and export models.

About

Sketch Viewer UP

This application allows users to import and view 3D models from various professional design software. It supports a wide range of file formats, making it convenient for designers, engineers, and students to access and analyze 3D drawings on their mobile devices.

Highlights
  • Import and view 3D drawings
  • Supports multiple professional 3D file formats
  • Collection of standard industry libraries
  • Mobile 3D viewing software
  • Professional CAD drawing and modeling
Features
Read full description

A professional 3D model browsing and viewing tool Designed for designers, artists, teachers, students, engineers, and those involved in engineering drawing, suitable for various professional scenarios in multiple industries. It comes with a vast library of industry-standard models and supports the import and viewing of various 3D drawings, with efficient and convenient operations. 1. Professional software for designers, artists, scholars, students, teachers, engineering drafters, and engineers 2. Comprehensive standard libraries for all industries 3. Supports importing and viewing 3D drawings, quick and convenient. 4. Supports multiple formats, including SKP, SolidWorks, ProE/Creo, sview, CATIA, Fbx, Ifc, Inventor, JT, Parasolid, PDMS, Rhino, U3D, UG, CGR, Maya, LightWave (mainstream formats), parsing and browsing dae, max, 3ds, obj, ABC, FBX, DAE, OBJ, BVH, DXF, PSK, STL, PLY, X3D, JCD, svp. At the same time, SU supports mobile 3D viewing software, professional CAD viewing, drawing, modeling! Privacy Policy: https://kdocs.cn/l/coraO45x7Hrz User Agreement: https://kdocs.cn/l/ciYVcrmHDELu

Screenshots

CASA Space Frame 3D4 screens
Sketch Viewer UP4 screens

Verdict

The call

The clearest difference is review sentiment: CASA Space Frame 3D at 100% against Sketch Viewer UP's 0%. CASA Space Frame 3D also leads on rating (4.0 vs 1.6) and in-app purchases (none vs 3). Sketch Viewer UP's advantage is price (Free vs $299.99) and update cadence (every 8 days vs every 3 months). On ads, 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

Sketch Viewer UP is free to download; CASA Space Frame 3D costs $299.99 up front. Sketch Viewer UP sells 3 one-off in-app purchases. CASA Space Frame 3D asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

CASA Space Frame 3D holds the better App Store score, 4.0 against 1.6. That said, the two scores are not equally well evidenced: Sketch Viewer UP has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of CASA Space Frame 3D's written reviews are positive against 0% of Sketch Viewer UP's.

UpkeepUpdate frequency

CASA Space Frame 3D ships an update every 3 months, Sketch Viewer UP every 8 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard7 real differences · 3 level
CASA Space Frame 3D versus Sketch Viewer UP: the parameters behind the verdict, then further details
ParameterCASA Space Frame 3DSketch Viewer UP
Price$299.99Free — better
Rating4.0 (1 ratings) — better1.6 (10 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings110 — better
Update frequencyEvery 3 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.113.0 — better
Further details — not scored
Size6 MB40 MB
Age rating4+17+
DeveloperIntesym Ltd.骁宇 陈

Customer experience

CASA Space Frame 3D

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Sketch Viewer UP

All ratings10 ratings
Positive10.0%
Neutral10.0%
Negative80.0%
Written reviews8 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

CASA Space Frame 3D

No in-app purchases

3 purchases

Sketch Viewer UP

One-time3
  • 一季度会员$9.99
  • 一年会员$24.99
  • 永久会员$29.99

Questions

Is CASA Space Frame 3D free?
CASA Space Frame 3D costs $299.99, with no in-app purchases.
Is Sketch Viewer UP free?
Sketch Viewer UP is free to download, with in-app purchases available.
Which has better reviews, CASA Space Frame 3D or Sketch Viewer UP?
CASA Space Frame 3D is rated higher. CASA Space Frame 3D averages 4.0 out of 5 from 1 ratings, while Sketch Viewer UP averages 1.6 from 10 ratings.
Do CASA Space Frame 3D or Sketch Viewer UP have ads?
Neither CASA Space Frame 3D nor Sketch Viewer UP shows ads.
Which is updated more often, CASA Space Frame 3D or Sketch Viewer UP?
CASA Space Frame 3D ships an update every 3 months, and Sketch Viewer UP every 8 days. Most recently, CASA Space Frame 3D was updated on October 23, 2026 and Sketch Viewer UP on October 24, 2026.

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