# Gridline: Grid & Value Study — Drawing grid for painters

> Drawing grid for painters (iPhone/iPad app by Sangwon Kim.)

- Source: https://appshunter.io/ios/app/gridline-grid-and-value-study/id6816087951 (this page in markdown: same URL + `.md`)
- Developer: [Sangwon Kim](https://appshunter.io/developer/1677937052)
- Category: Graphics & Design, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 24 MB
- Languages: American English, Korean
- Released: 2026-10-14
- Data updated: 2026-10-17

## What is Gridline?

Put a grid over any reference photo and check its values on the same screen.

Gridline is a drawing grid for painters, illustrators and art students who work from reference photos. Import a picture, set up the grid, switch to grayscale or a notan when you need to judge values, and paint with your phone or iPad beside the easel.

■ Free
• Import from your photo library or take a new photo
• Square or rectangular cells, with any number of columns and rows
• Diagonals, cell numbers, line color and line thickness
• Grayscale view, a 2-tone notan, and mirror
• Paint mode: the tools disappear, touches are ignored and the screen stays awake, so the device can stand by your easel. Long-press to leave
• Unlimited projects, each one reopening with the settings you left

■ Gridline Pro (one-time purchase)
• Notan in 3, 4 or 5 tones: drag the split points on the value scale and simplify the small details
• Fit to canvas: crop to A4, 8×10, 9×12, 11×14 or 16×20 in, or square, in portrait or landscape, and see the real cell size in cm or inches
• No ads

Pro is a single purchase, not a subscription. You can restore it on other devices signed in with the same Apple Account.

■ About ads
The free version shows one banner ad at the bottom of the project list. The editor, where you look at your reference, has no ads.

■ Your photos stay on your device
Gridline keeps its own copy of each reference inside the app. There is no account or sign-up, and your images are never uploaded.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Gridline Pro | $3.99 | one-time |


## Is Gridline safe?

Not enough ratings yet to assess Gridline.

## Is Gridline legit?

Gridline: Grid & Value Study appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Gridline is 70 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.0 — 2026-10-14

No release notes.

## More apps by Sangwon Kim

- [Build Ur: Build your Life](https://appshunter.io/ios/app/build-ur-build-your-life/id6450644562)
- [seizetheday - Routine & Habit](https://appshunter.io/ios/app/seizetheday-routine-and-habit/id6754905920)
- [Runsheet — Presenter Timer](https://appshunter.io/ios/app/runsheet-presenter-timer/id6790088291)
- [Cadence: Minimal Routine](https://appshunter.io/ios/app/cadence-minimal-routine/id6790137139)

All apps by Sangwon Kim: https://appshunter.io/developer/1677937052

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-17.*