# Flow vs PDF Highlighter & Markup

The clearest difference is ads: Flow at none against PDF Highlighter & Markup's shown. Flow also leads on update cadence (daily vs every 2 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Flow ships an update daily, PDF Highlighter & Markup every 2 weeks. The most recent releases landed on October 30, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Flow | PDF Highlighter & Markup |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 2 weeks |
| Size | 2 MB | 15 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Shreyansh Mishra](https://appshunter.io/developer/1793702162) | [Bokeria](https://appshunter.io/developer/1425332310) |

## What reviewers say

### Flow

[App page](https://appshunter.io/ios/app/flow-timer-and-productivity/id6741312777)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Highlighter & Markup

[App page](https://appshunter.io/ios/app/pdf-highlighter-and-markup/id6779879391)

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

**In-app purchases:** none


## Frequently asked questions

### Is Flow free?

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

### Is PDF Highlighter & Markup free?

PDF Highlighter & Markup is free to download, with no in-app purchases.

### Do Flow or PDF Highlighter & Markup have ads?

PDF Highlighter & Markup shows ads; Flow does not.

### Which is updated more often, Flow or PDF Highlighter & Markup?

Flow ships an update daily, and PDF Highlighter & Markup every 2 weeks. Most recently, Flow was updated on October 30, 2026 and PDF Highlighter & Markup on November 10, 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.*