# Value Study vs Caydo Art Design

The clearest difference is review sentiment: Value Study at 92% against Caydo Art Design's 0%. Value Study also leads on rating (4.8 vs 2.0) and ratings volume (3.3K vs 11). Caydo Art Design's advantage is in-app purchases (none vs 7). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Value Study sells 7 in-app purchases, starting at $3.99 per year. Caydo Art Design asks for nothing beyond the download.

Value Study holds the better App Store score, 4.8 against 2.0. That said, the two scores are not equally well evidenced: Value Study has 3.3K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 92% of Value Study's written reviews are positive against 0% of Caydo Art Design's.

Value Study ships an update every 2 weeks, Caydo Art Design every 10 days. Both last shipped on October 12, 2026.

## The numbers

| Metric | Value Study | Caydo Art Design |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (3.3K ratings)](https://appshunter.io/ios/app/value-study-art-reference/id1546616127/reviews)** | [2.0 (11 ratings)](https://appshunter.io/ios/app/caydo-art-design/id6744489065/reviews) |
| Number of ratings | **3.3K** | 11 |
| Positive reviews | **92.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 35 MB | 87 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Diem Limited](https://appshunter.io/developer/1439019995) | [Shenzhen Kaidu Network Technology Co., Ltd.](https://appshunter.io/developer/1807906639) |

## What reviewers say

### Value Study

[App page](https://appshunter.io/ios/app/value-study-art-reference/id1546616127)

This app helps artists improve their skills by analyzing light and shadow in reference images. It allows users to break down tones step-by-step, from simple black and white to more complex value ranges, aiding in the understanding of depth and form. It's a tool to enhance traditional art studies.

**Highlights:** Step-by-step tone breakdown, Highlighting areas of same value, Focus on light, shadow, and form, Greyscale value studies, Works with reference images

**Features:** Family Sharing, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Value Study Pro | $3.99 | per year |
| Value Study Pro (yearly) | $6.99 | per year |
| Appreciation | $2.99 | one-time |
| Value Study Pro (Lifetime) | $9.99 | one-time |
| Generous boost | $9.99 | one-time |
| Value Study | $17.99 | one-time |
| Amazing supporter | $24.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Helpful for value studies
- 💡 Allows adjusting number of values
- 🎨 Useful for artists and painters
- ⭐ Great tool for beginners

**What reviewers complain about**

- 🐛 Issues with accurately representing blue hues
- 🔍 Difficulty finding/importing photos
- 🤔 Unclear instructions/lack of tutorial

**Reported bugs**

- App crashes or fails to launch on some devices
- Occasional issues with image processing

**Requested features**

- Add ability to adjust value midpoint
- Include color study/color adjustment options
- Provide side-by-side comparison of original and simplified images
- Add customizable grid overlay


### Caydo Art Design

[App page](https://appshunter.io/ios/app/caydo-art-design/id6744489065)

Transform your photos into various art styles like digital oil paintings, diamond paintings, or hot bead sketches. This app provides a rich collection of picture materials to inspire your creative journey.

**Highlights:** Photo to digital oil painting, Photo to diamond painting, Photo to hot bead painting, Hand-drawn sketch conversion, Rich picture material library, One-click conversion

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Value Study free?

Value Study is free to download, with in-app purchases available.

### Is Caydo Art Design free?

Caydo Art Design is free to download, with no in-app purchases.

### Which has better reviews, Value Study or Caydo Art Design?

Value Study is rated higher. Value Study averages 4.8 out of 5 from 3.3K ratings, while Caydo Art Design averages 2.0 from 11 ratings.

### Do Value Study or Caydo Art Design have ads?

Neither Value Study nor Caydo Art Design shows ads.

### Which is updated more often, Value Study or Caydo Art Design?

Value Study ships an update every 2 weeks, and Caydo Art Design every 10 days. Most recently, Value Study was updated on October 12, 2026 and Caydo Art Design on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*