Federgraph vs Sketchalyze
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Federgraph
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Federgraph is a function plotter app to visualize a special built in function z = f(x, y) in 3D. The physical model behind the app is a system of springs. The built in function produces a variety of colorful pictures, some of which appear to have a face. Changing the parameters of the physical model will trigger a recalculation of the image.
Sketchalyze
This app allows users to sketch and analyze structural systems directly on their iPad. It provides instant visualization of analysis results like deformations and section forces, performing finite element analysis in the background. Users can define cross-sections, apply loads, and visualize results for linear and nonlinear analyses.
- Sketch structural systems
- Instant analysis results visualization
- Finite element analysis
- Tabulated and user-defined cross sections
- Truss and beam element types
- Linear and nonlinear analysis
- Load-deflection curves
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Sketch and analyze structural systems on the iPad. In Sketchalyze, Analysis results such as deformations and section forces are visualized instantly, a finite element analysis is performed in the background whenever needed. Features: - Tabulated and user defined cross sections - Truss and beam element types - Line and point loads on beam elements - Listing of model and result data - Share models via email and Facebook - Linear and geometrical nonlinear (load or displacement controlled) analysis - Load-deflection curves for nonlinear analysis - Visualization of kinematic modes for unsufficiently constrained systems - Background image for creating models of structures from photographs or drawings
Screenshots
Verdict
Federgraph and Sketchalyze are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Federgraph ships an update every 15 months, Sketchalyze every 13 months. The most recent releases landed on September 9, 2026 and September 13, 2026 respectively.
| Parameter | Federgraph | Sketchalyze |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (7 ratings) — better |
| Positive reviews | — | 60.0% of reviews |
| Number of ratings | — | 7 — better |
| Update frequency | Every 15 months | Every 13 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 29 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Gustav Schubert | Duy Truong |
In-app purchases
Federgraph
No in-app purchases
Sketchalyze
No in-app purchases
Questions
Is Federgraph free?
Is Sketchalyze free?
Do Federgraph or Sketchalyze have ads?
Which is updated more often, Federgraph or Sketchalyze?
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