# NotanIzer vs Overgrid

The clearest difference is price: Overgrid at Free against NotanIzer's $1.99. Overgrid also leads on rating (5.0 vs 4.3) and update cadence (weekly vs every 2 months). NotanIzer's advantage is in-app purchases (none vs 1) and ratings volume (105 vs 11). On ads and device support there is nothing between them.

Overgrid is free to download; NotanIzer costs $1.99 up front. Overgrid sells 1 one-off in-app purchase. NotanIzer asks for nothing beyond the download.

Overgrid holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: NotanIzer has 105 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 82% of NotanIzer's written reviews are positive against 100% of Overgrid's.

NotanIzer ships an update every 2 months, Overgrid weekly. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | NotanIzer | Overgrid |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.3 (105 ratings)](https://appshunter.io/ios/app/notanizer/id1169086981/reviews) | **[5.0 (11 ratings)](https://appshunter.io/ios/app/overgrid-drawing-grid/id6761921891/reviews)** |
| Number of ratings | **105** | 11 |
| Positive reviews | 81.8% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | **#38** | — |
| Size | 30 MB | 32 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad, Mac | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [bigpantsgroup LLC](https://appshunter.io/developer/315959079) | [Paintingstack Technologies SpA](https://appshunter.io/developer/1884953294) |

## What reviewers say

### NotanIzer

[App page](https://appshunter.io/ios/app/notanizer/id1169086981)

**Currently charting:** #38 Top Paid · Photo & Video (US App Store)

This app helps artists analyze the light and dark elements in their images. It offers various tools to convert images to black and white, grayscale, or multi-level palettes, allowing for detailed structural analysis and design enhancement. Users can also invert filter displays and share their processed images.

**Highlights:** Black and white conversion with adjustable threshold, Grayscale and color display modes, Multi-level color palette generation (3, 4, 10 levels), Adjustable level sliders, Slice function to highlight value ranges, Invert filter display option, Image sharing capabilities

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use interface
- 💡 Great for analyzing values/lighting
- 🎨 Useful for artists/painting
- 🚀 Quick and straightforward
- ✨ Creates interesting images

**What reviewers complain about**

- 🐛 Sidebar overlays controls on macOS
- 🐛 Images come out white on Mac
- 🐛 Cannot save named files to chosen folder
- 🐛 Watermark on prints after paying
- 🐛 Monthly fee and no way to remove app

**Reported bugs**

- Sidebar overlays slider controls and prevents their use on macOS
- Images come out white on Mac
- Watermark on prints after paying
- App won't open after 30 days
- Export images crashes app on iPad

**Requested features**

- Allow saving named files to chosen folder
- Disable sound effect for level limits
- Improve photo access to retain position
- Fix macOS sidebar overlay issue
- Fix Mac image export issue (white images)


### Overgrid

[App page](https://appshunter.io/ios/app/overgrid-drawing-grid/id6761921891)

Easily add a customizable grid to any photo for accurate drawing and painting. Scale your reference image to match your canvas dimensions and transfer proportions with confidence. Features include adjustable grid lines, adaptive contrast, value studies, and temperature overlays.

**Highlights:** Add customizable grids to photos, Scale reference to canvas dimensions, Adjustable grid lines, color, and opacity, Adaptive contrast for visibility, Value study and temperature overlay, Save and apply grid presets, Export at high resolution

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Overgrid Premium | $12.99 | one-time |


## Frequently asked questions

### Is NotanIzer free?

NotanIzer costs $1.99, with no in-app purchases.

### Is Overgrid free?

Overgrid is free to download, with in-app purchases available.

### Which has better reviews, NotanIzer or Overgrid?

Overgrid is rated higher. NotanIzer averages 4.3 out of 5 from 105 ratings, while Overgrid averages 5.0 from 11 ratings.

### Do NotanIzer or Overgrid have ads?

Neither NotanIzer nor Overgrid shows ads.

### Which is updated more often, NotanIzer or Overgrid?

NotanIzer ships an update every 2 months, and Overgrid weekly. Most recently, NotanIzer was updated on November 2, 2026 and Overgrid on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*