Comparison

Draw Grid on Image vs Value Study Assistant

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Draw Grid on Image

Overlay a customizable grid onto your images to maintain drawing proportions. Choose from various grid types, paper sizes, and units. Adjust line width and color for precise visual guides. Save your grid images to your camera roll with the Pro version.

Highlights
  • Add grid overlay to images
  • Multiple grid types (rectangle, square)
  • Customizable grid dimensions
  • Selectable paper sizes and units
  • Adjustable line width and color
  • Save grid images (Pro version)
Features
Read full description

This grid tool will help you keep proportion of drawing object. We can draw a layer of grid on top of your image. Hope it helps. Features: 1. Add grid on image. 2. There are 6 types of grids you can choose: - Rectangle (Set rows & cols) - Rectangle (Set row height & col width) - Square (Set rows only) - Square (Set cols only) - Square (Set row height only) - Square (Set col width only) 3. There are 6 paper sizes (A0, A1, A2, A3, A4, A5) with 2 unit types (cm, inch). 4. You can change line width (from 0.5 to 10). 5. You can change line color. 6. Save grid image to Camera Roll (Pro version only).

About

Value Study Assistant

This app simplifies photos into distinct light and dark masses, helping artists analyze composition and value structure before painting. It offers adjustable value levels, comparison tools, and cropping to standard art proportions.

Highlights
  • Simplify photos into 2-10 value levels
  • Compare original photo with simplified study
  • Adjust individual value groups
  • Crop to standard painting proportions
  • Download value studies as JPG
Features
Read full description

Value Study Assistant helps painters see the big picture before they begin painting. Upload any photo and instantly simplify it into clear value masses — from 2 to 10 levels of light and dark. Instead of getting lost in detail, you'll quickly see the essential shapes that create a strong composition. HOW IT WORKS 1) Upload your photo and choose 2–10 value levels with the slider. Two values gives you a classic notan — the fastest way to check your big shapes. 2) Use the Color / Values comparison slider to flip between your original reference and the simplified study. 3) Tap Modify Values to lighten or darken individual value groups until the structure reads right. 4) Crop your reference to any standard painting proportion — 4:5, 5:7, 11:14 and more — with pinch-to-zoom control. 5) Download your value study as a clean JPG to use beside your easel, on your tablet, or printed in the studio. Perfect for painters, illustrators, and art students who want to understand the value structure of their reference before committing to canvas. BUILT FOR PAINTERS Value Study Assistant helps you: • Quickly break down any photo into simple light and dark shapes • Check your notan with a two-value study • See the value structure of a scene before you paint • Strengthen compositions by focusing on major value relationships • Crop references to standard painting proportions • Work seamlessly on iPhone and iPad TRY EVERYTHING FREE Your first 2 photos unlock every feature — the full 2–10 value range, value fine-tuning, and cropping — plus 3 free downloads. Studio Access keeps the full toolkit forever with unlimited downloads. Try it free for 7 days. SUBSCRIPTION DETAILS Studio Access Yearly is an auto-renewing subscription. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is canceled at least 24 hours before the end of the current period. You can manage or cancel it anytime in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vQRm_6cUtrAeoQAjfgxpLy2LNYUHwqU59eJ8H3RZiHehccXIHnY46iWs2pIU4GDO756I7OL605DHtYK/pub

Screenshots

Draw Grid on Image4 screens
Value Study Assistant4 screens

Verdict

The call

The clearest difference is rating: Value Study Assistant at 5.0 against Draw Grid on Image's 4.4. Value Study Assistant also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). Draw Grid on Image's advantage is ratings volume (201 vs 3) and iOS requirement (13.0 vs 17.0). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Draw Grid on Image sells 1 one-off in-app purchase and Value Study Assistant sells 1 in-app purchase, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Value Study Assistant holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Draw Grid on Image has 201 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

Draw Grid on Image ships an update fortnightly, Value Study Assistant every 5 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 4 level
Draw Grid on Image versus Value Study Assistant: the parameters behind the verdict, then further details
ParameterDraw Grid on ImageValue Study Assistant
PriceFreeFree
Rating4.4 (201 ratings)5.0 (3 ratings) — better
Positive reviews66.0% of reviews—
Number of ratings201 — better3
Update frequencyFortnightlyEvery 5 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size122 MB5 MB
Age rating4+4+
DeveloperThang DoKristina Nelson

Customer experience

Draw Grid on Image

All ratings201 ratings
Positive85.6%
Neutral2.5%
Negative11.9%
Written reviews47 reviews
Positive66.0%
Neutral2.1%
Negative31.9%

Value Study Assistant

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Draw Grid on Image

Reported bugs

7 issues
  • Ads cannot be turned off
  • App is not functional on macOS
  • Incorrect grid dimensions when inputting values
  • Cannot save photos without upgrading
  • Cannot use own photos without upgrading
Show 2 more
  • Charges money even after uninstalling
  • App is paid, not free as advertised

Requested features

9 requests
  • Add user manual
  • Add numbering to grid cells
  • Improve accuracy of paper section sizes
  • Add black border option for grid lines
  • Add white and black filter option
Show 4 more
  • Add option to save images to device
  • Add Vietnamese language support
  • Add option for square rows and columns
  • Add 'letter' sized paper print option

Value Study Assistant

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Draw Grid on Image

One-time1
  • Upgrade to Pro$4.99
1 purchases

Value Study Assistant

Subscriptions1
  • Studio Access7 Days trial$9.991 Year

Questions

Is Draw Grid on Image free?
Draw Grid on Image is free to download, with in-app purchases available.
Is Value Study Assistant free?
Value Study Assistant is free to download, with in-app purchases available.
Which has better reviews, Draw Grid on Image or Value Study Assistant?
Value Study Assistant is rated higher. Draw Grid on Image averages 4.4 out of 5 from 201 ratings, while Value Study Assistant averages 5.0 from 3 ratings.
Do Draw Grid on Image or Value Study Assistant have ads?
Draw Grid on Image shows ads; Value Study Assistant does not.
Which is updated more often, Draw Grid on Image or Value Study Assistant?
Draw Grid on Image ships an update fortnightly, and Value Study Assistant every 5 days. Most recently, Draw Grid on Image was updated on November 3, 2026 and Value Study Assistant on October 31, 2026.

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