Value Study vs Grid Drawing
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Value Study
This app helps artists improve their drawing and painting skills by simplifying reference images into greyscale tones. It allows users to break down complex images into distinct value levels, making it easier to understand light, shadow, and form.
- Simplify images into greyscale tones
- Adjustable number of value levels
- Highlight areas of the same value
- Focus on light, shadow, and form
- Enhance traditional art studies
- Cross-device compatibility
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In art, value (or tone) refers to how light or dark a colour is. If you're learning to paint or draw, doing value studies is one of the best ways to improve. These small, loose sketches in greyscale help you understand where shadows fall and highlights appear—essential for capturing depth and form. Value Study is a simple, focused tool designed to help you see values more clearly in your reference images. Instead of just converting a photo to black and white, this app lets you break down tones step by step. Start with just black and white to map out the biggest shapes, then gradually add more values to refine your understanding. You can also highlight all areas of an image that share the same value, making it easier to see subtle shifts in tone. This is especially useful in complex references, like portraits, where different parts of the image might have the same level of shadow but look completely different in colour. Value Study isn’t here to replace traditional studies—it’s here to enhance them. Whether you're sketching, painting, or working digitally, this tool makes it easier to focus on the fundamentals of light, shadow, and form. Try it for free with all features enabled on sample images from Unsplash before deciding to unlock the full app with a low-cost yearly or lifetime purchase. All Value Study Pro upgrades count as lifetime purchase. Either option will unlock Value Study across iPhone, iPad and Mac. Annual: Auto-renews yearly. Lifetime: One-time payment, no fees. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Grid Drawing
This drawing app helps artists create photorealistic artwork by overlaying a custom grid on reference images. It allows users to break down images into layers, track progress, and compare their work to the original photograph to identify and correct errors.
- Upload reference images
- Apply custom grids
- Separate references into layers
- Track completed squares
- Compare drawing to photograph
- Mark errors
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Designed entirely by photorealist Dylan Eakin, Photorealism is a comprehensive drawing app that gives you the ability to upload a reference, apply a custom grid, and separate the reference into its essential layers. Keep track of how many squares you've finished, effortlessly compare your drawing against the photograph, mark errors, and more. The all-in-one drawing tool to make your own photographs. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://realismdrawing.com/privacy.html
Screenshots
Verdict
The clearest difference is ads: Value Study at none against Grid Drawing's shown. Value Study also leads on ratings volume (3.4K vs 174) and chart position (#157 vs unranked). Grid Drawing's advantage is update cadence (daily vs every 2 weeks). On price, rating, review sentiment and in-app purchases 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. Value Study sells 7 in-app purchases, starting at $7.99 per year and Grid Drawing sells 10 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.8 for Value Study against 4.9 for Grid Drawing. That said, the two scores are not equally well evidenced: Value Study has 3.4K ratings behind it against 174, so its average is the more settled of the two. Written reviews are what separate them: 92% of Value Study's written reviews are positive against 95% of Grid Drawing's.
Value Study ships an update every 2 weeks, Grid Drawing daily. Both last shipped on November 13, 2026.
| Parameter | Value Study | Grid Drawing |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (3.4K ratings) | 4.9 (174 ratings) — better |
| Positive reviews | 92.0% of reviews | 95.2% of reviews — better |
| Number of ratings | 3.4K — better | 174 |
| Update frequency | Every 2 weeks | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #157 — better | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 37 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Diem Limited | Dylan Eakin |
Customer experience
Value Study
Grid Drawing
Bugs and requests
Value Study
Reported bugs
2 issues- App crashes or fails to launch on some devices
- Occasional issues with image processing
Requested features
4 requests- 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
Grid Drawing
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Value Study
- Value Study Pro$7.991 Year
- Value Study Pro (yearly)$7.991 Year
- Appreciation$2.99
- Generous boost$9.99
- Value Study Pro (Lifetime)$17.99
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- Value Study$17.99
- Amazing supporter$24.99
Grid Drawing
- Remove Ads$0.991 Month
- Texture Practice II$0.99
- Refraction$0.99
- Self Portrait 2022$0.99
Show 6 moreShow fewer
- Moths to a Flame$0.99
- You Are Not Lost$0.99
- A Soul to Take$0.99
- Father$0.99
- Impact$0.99
- Remove Ads$8.99








