# Image Size vs DPI

The clearest difference is update cadence: Image Size at fortnightly against DPI's every 2 months. Image Size also leads on ratings volume (30K vs 1.1K) and review sentiment (71% vs 60%). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Image Size sells 3 one-off in-app purchases and DPI sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Image Size against 4.7 for DPI. That said, the two scores are not equally well evidenced: Image Size has 30K ratings behind it against 1.1K, so its average is the more settled of the two. Written reviews are what separate them: 71% of Image Size's written reviews are positive against 60% of DPI's.

Image Size ships an update fortnightly, DPI every 2 months. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Image Size | DPI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (30K ratings)](https://appshunter.io/ios/app/image-size/id670766542/reviews) | [4.7 (1.1K ratings)](https://appshunter.io/ios/app/dpi-dots-per-inch/id1376445792/reviews) |
| Number of ratings | **30K** | 1.1K |
| Positive reviews | **71.1% of reviews** | 60.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 161 MB | 40 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vitalij Schaefer](https://appshunter.io/developer/393749449) | [Vitalij Schaefer](https://appshunter.io/developer/393749449) |

## What reviewers say

### Image Size

[App page](https://appshunter.io/ios/app/image-size/id670766542)

Easily resize your photos to any dimension using pixels, millimeters, centimeters, or inches. Preserve aspect ratio with a simple tap and crop images with intuitive multitouch gestures. Save, email, print, or share your resized creations.

**Highlights:** Resize images to custom dimensions, Support for pixels, millimeters, centimeters, and inches, Preserve aspect ratio, Multitouch cropping, Save, email, print, and share options, Remove objects from images (in-app purchase), Ad-free experience (in-app purchase)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Leave a tip | $5.99 | one-time |
| Unlock eraser | $9.99 | one-time |
| Remove Ads | $39.99 | one-time |

**What reviewers like**

- 🚀 Straightforward and easy to use
- 👍 Intuitive user interface
- 🚀 Quick resizing and editing
- 💡 Useful features like watermarking and cropping
- 👍 Saves resized images to separate album

**What reviewers complain about**

- 🐛 Occasional issues with image quality after resizing
- 🔍 Unclear interface for some advanced features
- 💰 Paid version required to remove ads
- 🔍 Difficulty finding help/support options
- 🔍 Inconsistent behavior when resizing/printing images

**Reported bugs**

- Resized images not saving correctly
- Ads persisting even after purchasing ad-free version
- Freezing/crashing issues on certain devices

**Requested features**

- Batch processing for multiple images
- More file format options (e.g. PNG support)
- Ability to adjust DPI/resolution
- Option to customize print layout and positioning
- Improved help documentation and tutorials


### DPI

[App page](https://appshunter.io/ios/app/dpi-dots-per-inch/id1376445792)

Easily modify the DPI (dots per inch) of your images. Save, share, email, or print your adjusted photos with new DPI values.

**Highlights:** Change image DPI, Save modified image, Share image, Email image, Print image

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $34.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Cleans up projects nicely
- 💡 Fantastic for increasing image resolution for printing
- 👍 Great app
- 👍 Awesome one trick pony

**What reviewers complain about**

- 🐛 The app DOES NOT WORK as advertised
- 🐛 Darkened the original photo
- 🐛 Doesn't return PNG
- 💰 Too expensive at 18€
- 🌐 Doesn't work

**Reported bugs**

- Crashes when trying to look back in photos
- Doesn't handle large files, just crashes

**Requested features**

- Upload multiple images at a time
- Merge DPI and Image Size into a single app


## Frequently asked questions

### Is Image Size free?

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

### Is DPI free?

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

### Which has better reviews, Image Size or DPI?

Image Size and DPI are both rated 4.7 out of 5 on the App Store, from 30K and 1.1K ratings respectively.

### Do Image Size or DPI have ads?

Both Image Size and DPI show ads.

### Which is updated more often, Image Size or DPI?

Image Size ships an update fortnightly, and DPI every 2 months. Most recently, Image Size was updated on September 25, 2026 and DPI on September 24, 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.*