ONELAB vs 4D Draw
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ONELAB
This application provides a finite element package for simulating multi-physics problems. It integrates with open-source tools for mesh generation and solving, offering ready-to-use examples for electromagnetics, thermics, and mechanics.
- Finite element package
- Multi-physic problem simulation
- Electromagnetics, thermics, mechanics
- Integrates with Gmsh and GetDP
- Ready-to-use examples
- Add new models via zip archives
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ONELAB (http://onelab.info) is a finite element package based on the open source mesh generator Gmsh (http://gmsh.info) and the solver GetDP (http://getdp.info). It can be used to simulate a wide variety of multi-physic problems: electromagnetics, thermics, mechanics... ONELAB comes packaged with a selection of ready-to-use examples. New models can be added simply by opening the corresponding zip archive (in Safari, iCloud, Dropbox, etc.).
4D Draw
This app allows users to draw and visualize four-dimensional figures using color to represent the fourth coordinate. It includes a help menu with drawing tutorials and creative ideas to aid in understanding 4D space.
- Draw 4-dimensional figures
- Use color for the fourth coordinate
- Built-in 'How to draw' guide
- 4D construction ideas
- Visualize 4-dimensional space
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4D Draw is a simple vector-graphics app that lets you draw 4‑dimensional figures. It represents each point's first three coordinates in the usual way, while using color to represent the fourth coordinate. A built-in Help menu includes a “How to draw” page for an easy start, followed by a page of “4D construction ideas” to set you on your way towards visualizing 4-dimensional space. 4D Draw is intended for geometry students who want to learn to visualize 4‑dimensional space. People looking for a more recreational introduction to 4D should begin with 4D Maze instead. People looking for an even more recreational introduction to modern concepts of space and symmetry may enjoy the Torus Games or KaleidoPaint.
Screenshots
Verdict
The clearest difference is rating: ONELAB at 5.0 against 4D Draw's 3.4. ONELAB also leads on review sentiment (100% vs 70%) and update cadence (every 2 months vs every 7 months). 4D Draw's advantage is ratings volume (8 vs 1). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ONELAB holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: 4D Draw has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of ONELAB's written reviews are positive against 70% of 4D Draw's.
ONELAB ships an update every 2 months, 4D Draw every 7 months. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.
| Parameter | ONELAB | 4D Draw |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 3.4 (8 ratings) |
| Positive reviews | 100.0% of reviews — better | 70.0% of reviews |
| Number of ratings | 1 | 8 — better |
| Update frequency | Every 2 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 9.0 — better | 17.1 |
| Further details — not scored | ||
| Size | 95 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Christophe Geuzaine | Jeff Weeks |
Customer experience
ONELAB
4D Draw
In-app purchases
ONELAB
No in-app purchases
4D Draw
No in-app purchases
