Head Study vs Zolly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Head Study
This app provides artists with a 3D reference for understanding human anatomy and facial forms. It features simplified planes, a skull model, and adjustable lighting to aid in portraiture studies. Enhance your knowledge of the human form by exploring what lies beneath the surface.
- Simplified planes of the head model
- Anatomically correct male skull model
- 360-degree 3D model manipulation
- Adjustable lighting
- Switchable anatomical views
- Informational overlay with structural insights
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Artists have always needed a quick and easy reference to help them understand the anatomy & forms of their portrait models. The Head Study App, is that resource. These portrait models were created to make the study of portraiture easier, but also to enhance your knowledge of the human form. The appearance of the face can be understood best by studying what is underneath the surface. The simplified planar head and the skull in this app are made with the same proportion to make this comparison as clear as possible. FEATURES: + Simplified “planes of the head” model + Anatomically correct male skull model + Tumble and zoom the 3D model from 360 degrees + Adjust the position & strength of multiple lighting situations + Switch between simplified planes, skull, and muscular views + Toggle an informational overlay indicating, key structural features, or anatomical insights + Adjustable background value This app was developed to go along with the lessons on my Patreon page. If you have interest in learning to draw and paint portraits better you can find all of my lessons at: patreon.com/StephenBaumanArtwork Any questions? Contact us at: stephenbaumanartwork@gmail.com
Zolly
Learn dynamic perspective drawing by manipulating camera angles and object proximity. Explore ready-made models and primitive shapes to understand and experiment with perspective distortion for exciting visual effects.
- Learn perspective drawing
- Dynamic perspective manipulation
- Camera control for distortion
- Ready-made and primitive models
- Grid lines and ground planes
- Understand position and proximity
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If you want to learn perspective drawing and you’re willing to break some rules, then you need to check out ZOLLY! One of the most effective ways to draw with dynamic perspective is to play with its extremes… close and far contrasts can make your images exciting. The main purpose of this app is to heighten your awareness that position and proximity makes all the difference in how objects appear. Zolly Key Features: View tons of ready-made models to tackle both basic and advanced perspective challenges. Take total control of the camera to get the exact view and perspective distortion you’re looking for. Use grid lines, ground planes, and low-poly models to help you understand perspective. Primitive models that ease you into more complex forms, with edges and lines that can be turned on and off to better understand the underlying perspective. A perfect tool to go with the Proko Perspective course. Why ZOLLY? There's a technique in film called a Dolly Zoom (ZOLLY) where you can zoom in while moving the camera back which keeps an object the same size. It’s a trip and it's been used in movies like Jaws and Vertigo to make iconic moments. This app also allows you to play with the same mind-bending effect to see how position and proximity change everything! And the fun part? You can even experiment with other viewpoints and effects that you couldn’t pull off with a physical camera using ZOLLY. Zolly was designed to help you practice various forms in perspective, from simple and advanced primitive shapes, to more complex objects like vehicles and buildings. Draw from orthographic view, to extreme views, to anything in between. Manipulate forms in space with surprising viewpoints through a virtual camera, to expand your imagination, and prompt you to use perspective daringly as you play with form and space in your drawings.The goal for many artists is to push past the predictable and into the impossible. Stretch space. Stretch your mind. And yeah, stretch your art with ZOLLY.
Screenshots
Verdict
The clearest difference is price: Zolly at Free against Head Study's $7.99. Zolly also leads on review sentiment (100% vs 78%) and rating (5.0 vs 4.8). On ratings volume, ads, in-app purchases and device support 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
Zolly is free to download; Head Study costs $7.99 up front. Head Study sells 1 one-off in-app purchase and Zolly sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Zolly holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 34 and 17 respectively. Written reviews point the same way: 78% of Head Study's written reviews are positive against 100% of Zolly's.
| Parameter | Head Study | Zolly |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | 4.8 (34 ratings) | 5.0 (17 ratings) — better |
| Positive reviews | 77.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 34 — better | 17 |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 342 MB | 485 MB |
| Age rating | 4+ | 4+ |
| Developer | Stephen Bauman Artwork | Proko |
Customer experience
Head Study
Zolly
In-app purchases
Head Study
- Female Planes + Skull$4.99
Zolly
- XYZ Forms$1.99
- Vehicle Pack$4.99
- Buildings Pack$4.99
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- Home Props Pack$4.99
- Work Props Pack$4.99








