# PDF Splitter + PDF Merge vs PDFOptim

The clearest difference is rating: PDFOptim at 4.7 against PDF Splitter + PDF Merge's 4.5. PDF Splitter + PDF Merge's advantage is review sentiment (88% vs 76%) and update cadence (every 3 months vs every 5 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. PDF Splitter + PDF Merge sells 2 one-off in-app purchases and PDFOptim sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

PDFOptim holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 139 and 292 respectively. Written reviews complicate that: 88% of PDF Splitter + PDF Merge's written reviews are positive against 76% of PDFOptim's, so the app with the better star average is not the one people write more warmly about.

PDF Splitter + PDF Merge ships an update every 3 months, PDFOptim every 5 months. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | PDF Splitter + PDF Merge | PDFOptim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (139 ratings)](https://appshunter.io/ios/app/pdf-splitter-plus-pdf-merge/id651952889/reviews) | **[4.7 (292 ratings)](https://appshunter.io/ios/app/pdfoptim/id903356489/reviews)** |
| Number of ratings | 139 | **292** |
| Positive reviews | **88.2% of reviews** | 75.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 4 MB | 8 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [青青 余](https://appshunter.io/developer/633344484) | [RootRise Technologies Pvt. Ltd.](https://appshunter.io/developer/594431033) |

## What reviewers say

### PDF Splitter + PDF Merge

[App page](https://appshunter.io/ios/app/pdf-splitter-plus-pdf-merge/id651952889)

Easily combine multiple PDF files into a single document or extract specific pages from existing PDFs. This tool supports merging password-protected files if the password is known.

**Highlights:** Extract pages from PDF, Merge specified pages of multiple PDFs, Merge password-protected PDFs, Combine PDFs into one

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock（without restriction） | $3.99 | one-time |
| Unlock iOS without restriction | $3.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 🚀 Quick and efficient
- 🚀 Intuitive interface
- 👍 Reliable and consistent
- 👍 Excellent value for free app

**What reviewers complain about**

- 🐛 Issues with sorting/reordering files
- 🐛 Limitations on number of files
- 🔧 Outdated or basic interface design
- 💰 Requests payment after trial period

**Reported bugs**

- Corrupts text in merged PDF documents
- Paid version does not work as expected

**Requested features**

- Add page preview functionality
- Allow merging of other file types (not just PDFs)
- Improve file sorting/reordering capabilities
- Provide more customization options


### 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)


## Frequently asked questions

### Is PDF Splitter + PDF Merge free?

PDF Splitter + PDF Merge is free to download, with in-app purchases available.

### Is PDFOptim free?

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

### Which has better reviews, PDF Splitter + PDF Merge or PDFOptim?

PDFOptim is rated higher. PDF Splitter + PDF Merge averages 4.5 out of 5 from 139 ratings, while PDFOptim averages 4.7 from 292 ratings.

### Do PDF Splitter + PDF Merge or PDFOptim have ads?

Neither PDF Splitter + PDF Merge nor PDFOptim shows ads.

### Which is updated more often, PDF Splitter + PDF Merge or PDFOptim?

PDF Splitter + PDF Merge ships an update every 3 months, and PDFOptim every 5 months. Most recently, PDF Splitter + PDF Merge was updated on October 7, 2026 and PDFOptim on October 14, 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.*