# Read library vs KIOS CoE

The clearest difference is in-app purchases: KIOS CoE at none against Read library's 19. Read library's advantage is iOS requirement (11.0 vs 13.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Read library sells 19 one-off in-app purchases. KIOS CoE asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 14, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Read library | KIOS CoE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Size | 19 MB | 23 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [N.D.D EIDIKES EKDOSEIS LTD](https://appshunter.io/developer/502309357) | [University of Cyprus - KIOS Center of Excellence](https://appshunter.io/developer/1574176825) |

## What reviewers say

### Read library

[App page](https://appshunter.io/ios/app/read-library/id763522088)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (19)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Γαστρονόμος 179 | $1.99 | one-time |
| Γαστρονόμος 180 | $1.99 | one-time |
| Νεφέλες και Σειρήνες | $3.99 | one-time |
| Δώρος Γεωργιάδης, | $4.99 | one-time |
| Καλημέρα Ήλιε | $6.99 | one-time |
| Μολυβιές | $6.99 | one-time |
| Το ζεϊπέκκικο της Ευδοξίας | $7.99 | one-time |
| Η ζηλιάρα αδερφούλα μου | $8.99 | one-time |
| Το πασίγνωστο μυστικό | $8.99 | one-time |
| Γκασταρμπάιτερ η οδυνηρή φυγή | $9.99 | one-time |
| Γκασταρμπάιντερ,η οδυνηρή φυγή | $9.99 | one-time |
| Τα Πιβικόλια | $9.99 | one-time |
| Με τα μάτια του σκύλου | $9.99 | one-time |
| Τρία λεπτά με τον Θεό | $9.99 | one-time |
| Μια φορά τζ' έναν τζαιρόν | $11.99 | one-time |
| Κέικ Γεωγραφίας | $12.99 | one-time |
| Εσύ για σένα | $14.99 | one-time |
| The bridge of fire | $14.99 | one-time |
| Σαν εφιάλτης | $14.99 | one-time |


### KIOS CoE

[App page](https://appshunter.io/ios/app/kios-coe/id1619091751)

**In-app purchases:** none


## Frequently asked questions

### Is Read library free?

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

### Is KIOS CoE free?

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

### Do Read library or KIOS CoE have ads?

Neither Read library nor KIOS CoE shows ads.

### Which is updated more often, Read library or KIOS CoE?

Read library ships an update every 4 months, and KIOS CoE every 4 months. Most recently, Read library was updated on September 14, 2026 and KIOS CoE on September 19, 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.*