# CosMate vs Folio 以書會友

CosMate and Folio 以書會友 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CosMate ships an update every 5 days, Folio 以書會友 weekly. The most recent releases landed on September 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | CosMate | Folio 以書會友 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/folio/id6771667110/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | — | Free |
| Size | 174 MB | 215 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Cosmate Co., Ltd.](https://appshunter.io/developer/948562625) | [Yu-Ting Liao](https://appshunter.io/developer/1818270595) |

## What reviewers say

### CosMate

[App page](https://appshunter.io/ios/app/cosmate/id6746790116)

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

**In-app purchases:** none


### Folio 以書會友

[App page](https://appshunter.io/ios/app/folio/id6771667110)

This app facilitates deep connections through shared reading experiences. Users can invite others to read a book together, fostering meaningful interactions beyond superficial matching. It also serves as a personal digital bookshelf for tracking reading progress and thoughts.

**Highlights:** Shared reading experiences, Three user intentions for interaction, Four-stage co-reading process, Personal digital bookshelf, Progress-based chat unlocking, Shareable reading summaries

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

**In-app purchases:** none


## Frequently asked questions

### Is CosMate free?

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

### Is Folio 以書會友 free?

Folio 以書會友 is free to download, with no in-app purchases.

### Do CosMate or Folio 以書會友 have ads?

Neither CosMate nor Folio 以書會友 shows ads.

### Which is updated more often, CosMate or Folio 以書會友?

CosMate ships an update every 5 days, and Folio 以書會友 weekly. Most recently, CosMate was updated on September 9, 2026 and Folio 以書會友 on September 23, 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.*