# PDF Scanner & Simple Reader vs Kairo

The clearest difference is device support: PDF Scanner & Simple Reader at 3 against Kairo's 1. PDF Scanner & Simple Reader also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. PDF Scanner & Simple Reader sells 2 in-app purchases, starting at $0.99 per month and Kairo sells 1 in-app purchase, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 25, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | PDF Scanner & Simple Reader | Kairo |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 64 MB | 15 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KunWoo Kwon](https://appshunter.io/developer/1603506815) | [changjun lee](https://appshunter.io/developer/6792239358) |

## What reviewers say

### PDF Scanner & Simple Reader

[App page](https://appshunter.io/ios/app/pdf-scanner-and-simple-reader/id6753705461)

Transform paper documents into searchable PDFs using your device's camera. Read, bookmark, and organize your scanned files offline with a simple, intuitive interface. Offers tools for page extraction and merging for efficient document management.

**Highlights:** Document scanning to PDF, Simple PDF reader with zoom, Continue reading from last page, Bookmark important pages, Offline PDF access, Extract and merge PDF pages

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| remove ads (one month) | $0.99 | per month |
| remove ads (life time) | $4.99 | one-time |


### Kairo

[App page](https://appshunter.io/ios/app/kairo-hours-tracker-and-crm/id6792239356)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kairo Pro Monthly | $4.99 | per month |


## Frequently asked questions

### Is PDF Scanner & Simple Reader free?

PDF Scanner & Simple Reader is free to download, with in-app purchases available.

### Is Kairo free?

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

### Do PDF Scanner & Simple Reader or Kairo have ads?

Neither PDF Scanner & Simple Reader nor Kairo shows ads.

### Which is updated more often, PDF Scanner & Simple Reader or Kairo?

PDF Scanner & Simple Reader ships an update weekly, and Kairo weekly. Most recently, PDF Scanner & Simple Reader was updated on October 25, 2026 and Kairo on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*