Comparison

Grid # 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

Grid #

Easily add customizable grids to your images for drawing and reference. Choose from various grid types, colors, and line styles. Advanced features allow for movable and rotatable grids, with options for multiple grid overlays.

Highlights
  • Add grids to images
  • Multiple grid types (rectangle, square)
  • Customizable line colors and transparency
  • Adjustable line width
  • Add multiple grids
  • Movable and rotatable grids (pro feature)
Features
Read full description

I believe there are always some people in this world who want to add grids to images, just like me. That's why I developed Grid#. Hope it helps. Features: 1. Add grid on image. 2. There are 5 types of grids you can choose: - a. Rectangle(Set rows & cols) - b. Square(Set rows only) - c. Square(Set cols only) - d. Rectangle(Set row height & col width) - e. Square(Set row height only)[pro feature] 3. The lines can be colourful. Use whatever RGB color you like. You can change lines' transparency. 4. You can change line width (from 1 to 20). 5. You can add multiple grids(at most 3) on the image. [grid 3 is pro feature] 6. You can pick colors from image. 7. There are 2 modes: - a. Fixed Grid: Grid cannot be moved nor be rotated. - b. Movable Grid[pro feature]: Grid can be move, or be rotated (Move two fingers around each other to rotate the grid)

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

Grid #4 screens
Value Study Assistant4 screens

Verdict

The call

The clearest difference is in-app purchases: Value Study Assistant at none against Grid #'s 1. Value Study Assistant also leads on ads (none vs shown) and update cadence (every 4 days vs every 3 months). Grid #'s advantage is ratings volume (10K vs 1) and iOS requirement (12.0 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. Grid # 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 4.6. That said, the two scores are not equally well evidenced: Grid # has 10K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Grid # ships an update every 3 months, Value Study Assistant every 4 days. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

Scorecard7 real differences · 3 level
Grid # versus Value Study Assistant: the parameters behind the verdict, then further details
ParameterGrid #Value Study Assistant
PriceFreeFree
Rating4.6 (10K ratings)5.0 (1 ratings) — better
Positive reviews66.2% of reviews—
Number of ratings10K — better1
Update frequencyEvery 3 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size13 MB5 MB
Age rating4+4+
Developer金鹏 王Kristina Nelson

Customer experience

Grid #

All ratings10,077 ratings
Positive90.9%
Neutral3.3%
Negative5.8%
Written reviews399 reviews
Positive66.2%
Neutral8.0%
Negative25.8%

Value Study Assistant

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Grid #

Reported bugs

4 issues
  • Grid settings don't always stick
  • Can't load or use certain images
  • Upgrade purchase not recognized
  • App stops working after updates

Requested features

5 requests
  • Add option to create square grids
  • Include grid measurements/dimensions
  • Provide more instructions and tutorials
  • Allow rotating or flipping the grid
  • Add ability to save gridded images

Value Study Assistant

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Grid #

One-time1
  • [More features & Remove Ads]$3.99
None

Value Study Assistant

No in-app purchases

Questions

Is Grid # free?
Grid # 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, Grid # or Value Study Assistant?
Value Study Assistant is rated higher. Grid # averages 4.6 out of 5 from 10K ratings, while Value Study Assistant averages 5.0 from 1 ratings.
Do Grid # or Value Study Assistant have ads?
Grid # shows ads; Value Study Assistant does not.
Which is updated more often, Grid # or Value Study Assistant?
Grid # ships an update every 3 months, and Value Study Assistant every 4 days. Most recently, Grid # was updated on October 14, 2026 and Value Study Assistant on October 1, 2026.

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