Plastic vs Frustum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Plastic
Create 3D models using volumetric primitives and boolean operations, not polygons. Apply color and make non-destructive edits throughout the entire workflow. Export your creations for animation, rendering, or 3D printing.
- Volumetric modeling with primitives
- Add and subtract operations
- Integrated coloring tools
- Non-destructive editing
- Export to PLY format
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In contrast to most other modeling tools, Plastic does not use polygons to define the shape of an object. Instead, you build up a volumetric representation by simply combining primitives with add and subtract operations. The same tools used for modeling can also be used to apply color to the model in one continuous workflow. And, since all of these actions in Plastic are non-destructive, you can easily change aspects of your scene at any point without affecting unrelated work. When you are done, objects can be exported as PLY files to be animated, rendered, or 3D printed with the help of other tools. To get started, create a new project by tapping the “+”-symbol in the project gallery. To edit an object in the scene, you can either tap it twice in the outline or tap the “Edit” button after selecting it and switching to the attributes panel. By tapping the plus button in the outline panel, you can now add strokes to your object and build up its shape. Although I am trying my best to provide a polished experience, Plastic is still in an early stage in its development and occasional bugs, missing features, and frequent design changes cannot be completely avoided. If you are interested in updates on the development progress, feel free to follow me on Twitter @raffael_kaehn. For feedback, please send me a direct message or an email to feedback@plastic.app.
Frustum
Visualize 3D viewing frustums in an immersive experience. This application allows users to explore and understand the geometric concept of a frustum. It's a straightforward tool for educational or design purposes.
- 3D frustum visualization
- Immersive experience
- Educational tool
- Design exploration
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A 3D viewing frustum
Screenshots
Verdict
The clearest difference is review sentiment: Plastic at 86% against Frustum's 0%. Plastic also leads on ratings volume (16 vs 2). Frustum's advantage is price (Free vs $9.99) and rating (5.0 vs 3.8). On ads, in-app purchases, 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
Frustum is free to download; Plastic costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Frustum holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Plastic has 16 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 86% of Plastic's written reviews are positive against 0% of Frustum's, so the app with the better star average is not the one people write more warmly about.
Plastic ships an update monthly, Frustum daily. The most recent releases landed on September 26, 2026 and September 19, 2026 respectively.
| Parameter | Plastic | Frustum |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 3.8 (16 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 85.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 16 — better | 2 |
| Update frequency | Monthly | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 123 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Raffael Kaehn | Brett Kuprel |
Customer experience
Plastic
Frustum
In-app purchases
Plastic
No in-app purchases
Frustum
No in-app purchases









