# KeyFolder2 vs Book Flip Notes

The clearest difference is in-app purchases: KeyFolder2 at none against Book Flip Notes's 1. KeyFolder2 also leads on iOS requirement (15.1 vs 17.0). Book Flip Notes's advantage is ads (none vs shown) and update cadence (every 9 days vs every 15 months). On price and device support there is nothing between them.

Both are free to download. Book Flip Notes sells 1 one-off in-app purchase. KeyFolder2 asks for nothing beyond the download.

KeyFolder2 ships an update every 15 months, Book Flip Notes every 9 days. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | KeyFolder2 | Book Flip Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 15 months | **Every 9 days** |
| Size | 28 MB | 72 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Tatsuya Tobioka](https://appshunter.io/developer/363452280) | [lecoo](https://appshunter.io/developer/1630534948) |

## What reviewers say

### KeyFolder2

[App page](https://appshunter.io/ios/app/keyfolder2-filelist-with-pin/id1594374317)

**In-app purchases:** none


### Book Flip Notes

[App page](https://appshunter.io/ios/app/book-flip-notes/id6782423238)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $0.99 | one-time |


## Frequently asked questions

### Is KeyFolder2 free?

KeyFolder2 is free to download, with no in-app purchases.

### Is Book Flip Notes free?

Book Flip Notes is free to download, with in-app purchases available.

### Do KeyFolder2 or Book Flip Notes have ads?

KeyFolder2 shows ads; Book Flip Notes does not.

### Which is updated more often, KeyFolder2 or Book Flip Notes?

KeyFolder2 ships an update every 15 months, and Book Flip Notes every 9 days. Most recently, KeyFolder2 was updated on October 20, 2026 and Book Flip Notes on October 24, 2026.

---

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