# BISIS vs Azbukum E

The clearest difference is iOS requirement: BISIS at 13.0 against Azbukum E's 15.1. On price, update cadence, 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.

BISIS ships an update every 6 months, Azbukum E every 4 months. The most recent releases landed on June 8, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | BISIS | Azbukum E |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 16 MB | 33 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FTN Informatika doo Novi Sad](https://appshunter.io/developer/1561961274) | [Azbukum](https://appshunter.io/developer/1711050624) |

## What reviewers say

### BISIS

[App page](https://appshunter.io/ios/app/bisis/id1599893595)

A library information system designed to support public, school, university, and specialized libraries. It facilitates the management and operation of library services.

**Highlights:** Library information system, Supports public libraries, Supports school libraries, Supports university libraries, Supports specialized libraries, Facilitates library operations

**Features:** macOS Compatibility

**In-app purchases:** none


### Azbukum E

[App page](https://appshunter.io/ios/app/azbukum-e-book/id6468958903)

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

**In-app purchases:** none


## Frequently asked questions

### Is BISIS free?

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

### Is Azbukum E free?

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

### Do BISIS or Azbukum E have ads?

Neither BISIS nor Azbukum E shows ads.

### Which is updated more often, BISIS or Azbukum E?

BISIS ships an update every 6 months, and Azbukum E every 4 months. Most recently, BISIS was updated on June 8, 2026 and Azbukum E on September 6, 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.*