# PDF Highlighter vs Similar Plus

The clearest difference is price: PDF Highlighter at Free against Similar Plus's $149.99. Similar Plus's advantage is in-app purchases (none vs 3) and update cadence (every 11 days vs every 95 months). On ads and device support there is nothing between them.

PDF Highlighter is free to download; Similar Plus costs $149.99 up front. PDF Highlighter sells 3 in-app purchases, starting at $2.99 per 7 days. Similar Plus asks for nothing beyond the download.

PDF Highlighter ships an update every 95 months, Similar Plus every 11 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | PDF Highlighter | Similar Plus |
| --- | --- | --- |
| Price | **Free** | $149.99 |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/pdf-highlighter-read-and-edit/id1434848610/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 95 months | **Every 11 days** |
| Monetization | Free | — |
| Size | 33 MB | 21 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Jaydeep Dhameliya](https://appshunter.io/developer/1315657518) | [Thinkwider CO., LTD.](https://appshunter.io/developer/1637233894) |

## What reviewers say

### PDF Highlighter

[App page](https://appshunter.io/ios/app/pdf-highlighter-read-and-edit/id1434848610)

Easily edit and highlight text, photos, and documents directly on your phone. This app provides realistic highlighting tools and drawing functions to mark important sections of PDFs and images, allowing you to save and share your annotated files.

**Highlights:** Edit and highlight PDF files and photos, Use realistic highlighter pen tool, Freehand drawing with pen, line, arrow, rectangle, and circle tools, Change drawing tool colors and sizes, Zoom in/out PDF pages, Export highlighted PDFs and photos, Add, delete, or edit PDF pages

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Highlighter Purchase Week | $2.99 | per 7 days |
| PDF Highlighter Purchase Month | $9.99 | per month |
| PDF Highlighter Purchase Year | $110.99 | per year |


### Similar Plus

[App page](https://appshunter.io/ios/app/similar-plus/id6477751626)

**In-app purchases:** none


## Frequently asked questions

### Is PDF Highlighter free?

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

### Is Similar Plus free?

Similar Plus costs $149.99, with no in-app purchases.

### Do PDF Highlighter or Similar Plus have ads?

Neither PDF Highlighter nor Similar Plus shows ads.

### Which is updated more often, PDF Highlighter or Similar Plus?

PDF Highlighter ships an update every 95 months, and Similar Plus every 11 days. Most recently, PDF Highlighter was updated on October 24, 2026 and Similar Plus on October 27, 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.*