# 북코스모스 vs Folio

The clearest difference is in-app purchases: 북코스모스 at none against Folio's 3. 북코스모스 also leads on device support (3 vs 1) and iOS requirement (10.0 vs 16.0). Folio's advantage is update cadence (every 9 days vs every 4 months). On price and ads there is nothing between them.

Both are free to download. Folio sells 3 in-app purchases, starting at $4.99 per month. 북코스모스 asks for nothing beyond the download.

북코스모스 ships an update every 4 months, Folio every 9 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 북코스모스 | Folio |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Size | 24 MB | 10 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Sungyoung Choi Sungyoung Choi](https://appshunter.io/developer/1257995998) | [Tetsuhiro Nomura](https://appshunter.io/developer/1806548895) |

## What reviewers say

### 북코스모스

[App page](https://appshunter.io/ios/app/id1499612924)

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

**In-app purchases:** none


### Folio

[App page](https://appshunter.io/ios/app/folio-read-the-classics/id6786104973)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Folio — Monthly | $4.99 | per month |
| Folio — Yearly | $29.99 | per year |
| Lifetime — Full Library | $49.99 | one-time |


## Frequently asked questions

### Is 북코스모스 free?

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

### Is Folio free?

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

### Do 북코스모스 or Folio have ads?

Neither 북코스모스 nor Folio shows ads.

### Which is updated more often, 북코스모스 or Folio?

북코스모스 ships an update every 4 months, and Folio every 9 days. Most recently, 북코스모스 was updated on October 25, 2026 and Folio on October 24, 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.*