# PDFOptim vs Noizer One

The clearest difference is in-app purchases: Noizer One at none against PDFOptim's 3. Noizer One also leads on review sentiment (100% vs 76%) and rating (5.0 vs 4.7). PDFOptim's advantage is ratings volume (295 vs 1). On price and device support there is nothing between them.

Both are free to download. PDFOptim sells 3 in-app purchases, starting at $0.99 per month. Noizer One asks for nothing beyond the download.

Noizer One holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: PDFOptim has 295 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 76% of PDFOptim's written reviews are positive against 100% of Noizer One's.

## The numbers

| Metric | PDFOptim | Noizer One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (295 ratings)](https://appshunter.io/ios/app/pdfoptim/id903356489/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/noizer-one/id1642306115/reviews)** |
| Number of ratings | **295** | 1 |
| Positive reviews | 75.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 5 months | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 8 MB | 15 MB |
| Requires iOS | 15.6 | **12.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RootRise Technologies Pvt. Ltd.](https://appshunter.io/developer/594431033) | [Dmitriy Malakhov](https://appshunter.io/developer/1642306117) |

## What reviewers say

### PDFOptim

[App page](https://appshunter.io/ios/app/pdfoptim/id903356489)

Easily compress and optimize PDF files on your iPhone and iPad. Reduce the size of large documents, saving storage space and transmission time. Offers both automatic and manual compression modes with advanced settings for image and vector graphics.

**Highlights:** Compress PDF documents, Optimize PDF files, Automatic compression mode, Manual compression mode, Adjust image resolution and quality, Optimize vector graphics, Support for password-protected PDFs

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium : Monthly Access | $0.99 | per month |
| Premium : Yearly Access | $2.99 | per year |
| Premium : Lifetime Access | $4.99 | one-time |

**What reviewers like**

- 👍 Excellent compression quality
- 🚀 Efficient and fast performance
- 👍 Simple and easy to use
- 💰 Good value for money (one-time purchase)
- 👍 No annoying subscriptions

**What reviewers complain about**

- 🐛 App not launching/freezing
- 🐛 Doesn't work for certain file types (e.g., GoodNotes)
- 🐛 Poor image quality/pixelation
- 🐛 Compression not effective on all PDFs
- 🐛 Confusing or illogical interface

**Reported bugs**

- App not launching on iOS 18.0.1
- App freezes during launch
- App won't take purchases
- Cannot optimize certain PDFs
- Compression not effective on marked-up PDFs

**Requested features**

- Support for iOS shortcuts
- macOS version integration/cross-platform compatibility
- Improved handling of specific file types like GoodNotes
- Better optimization for handwritten notes within PDFs
- Cloud storage for compressed documents (iCloud)


### Noizer One

[App page](https://appshunter.io/ios/app/noizer-one/id1642306115)

Create custom soundscapes for focus, work, study, or soothing a baby. This drum-machine app offers a variety of sounds to match your mood in seconds.

**Highlights:** Custom soundscape creation, Focus sounds for work and study, Calming sounds for babies, Mood-matching audio, Intuitive drum-machine interface

**In-app purchases:** none


## Frequently asked questions

### Is PDFOptim free?

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

### Is Noizer One free?

Noizer One is free to download, with no in-app purchases.

### Which has better reviews, PDFOptim or Noizer One?

Noizer One is rated higher. PDFOptim averages 4.7 out of 5 from 295 ratings, while Noizer One averages 5.0 from 1 ratings.

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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.*