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.

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 in-app purchases (none vs 1) and ads (none vs shown). Draw Grid on Image's advantage is ratings volume (197 vs 1) and iOS requirement (13.0 vs 17.0). On price 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. Value Study Assistant asks for nothing beyond the download.

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 197 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Draw Grid on Image ships an update fortnightly, Value Study Assistant every 4 days. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

Scorecard7 real differences · 3 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 (197 ratings)5.0 (1 ratings) — better
Positive reviews65.2% of reviews—
Number of ratings197 — better1
Update frequencyFortnightlyEvery 4 days — better
AdsYesNo — better
In-app purchasesYesNo — better
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 ratings197 ratings
Positive86.3%
Neutral1.5%
Negative12.2%
Written reviews46 reviews
Positive65.2%
Neutral2.2%
Negative32.6%

Value Study Assistant

All ratings1 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
None

Value Study Assistant

No in-app purchases

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 no in-app purchases.
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 197 ratings, while Value Study Assistant averages 5.0 from 1 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 4 days. Most recently, Draw Grid on Image was updated on October 12, 2026 and Value Study Assistant on October 1, 2026.

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