# Apotemi Açık Kitap vs Calpy

The clearest difference is update cadence: Calpy at every 2 weeks against Apotemi Açık Kitap's every 2 months. Apotemi Açık Kitap's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

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

Apotemi Açık Kitap ships an update every 2 months, Calpy every 2 weeks. The most recent releases landed on November 2, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Apotemi Açık Kitap | Calpy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (15 ratings)](https://appshunter.io/ios/app/apotemi-ack-kitap/id1333464218/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 37.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 88 MB | 45 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [FERNUS BILISIM HIZMETLERI EGI.DAN. ve TIC.LTD.STI.](https://appshunter.io/developer/927900317) | [EREN BAYHAN](https://appshunter.io/developer/6822076407) |

## What reviewers say

### Apotemi Açık Kitap

[App page](https://appshunter.io/ios/app/apotemi-ack-kitap/id1333464218)

This free application allows users to view solutions to questions found in books. It's a helpful tool for students and learners seeking to understand problem-solving steps.

**Highlights:** View question solutions, Free to use, Supports book-based learning

**Features:** macOS Compatibility

**In-app purchases:** none


### Calpy

[App page](https://appshunter.io/ios/app/calpy/id6822076405)

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

**In-app purchases:** none


## Frequently asked questions

### Is Apotemi Açık Kitap free?

Apotemi Açık Kitap is free to download, with no in-app purchases.

### Is Calpy free?

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

### Do Apotemi Açık Kitap or Calpy have ads?

Neither Apotemi Açık Kitap nor Calpy shows ads.

### Which is updated more often, Apotemi Açık Kitap or Calpy?

Apotemi Açık Kitap ships an update every 2 months, and Calpy every 2 weeks. Most recently, Apotemi Açık Kitap was updated on November 2, 2026 and Calpy on November 10, 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.*