# OG1.Chat vs ЕГЭ Биология

The clearest difference is update cadence: OG1.Chat at every 2 weeks against ЕГЭ Биология's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

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

OG1.Chat ships an update every 2 weeks, ЕГЭ Биология every 3 months. The most recent releases landed on October 17, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | OG1.Chat | ЕГЭ Биология |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/og1chat/id6472879732/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Free | — |
| Size | 30 MB | 39 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Онлайн Гимназия №1](https://appshunter.io/developer/1662050338) | [The New School Limited Liability Company](https://appshunter.io/developer/1622694692) |

## What reviewers say

### OG1.Chat

[App page](https://appshunter.io/ios/app/og1chat/id6472879732)

A communication platform designed for students, parents, teachers, and curators of "Online Gymnasium №1". Facilitates interaction within the educational community.

**Highlights:** Student communication, Parent communication, Teacher communication, Curator communication, Educational community platform

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

**In-app purchases:** none


### ЕГЭ Биология

[App page](https://appshunter.io/ios/app/id6753589094)

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

**In-app purchases:** none


## Frequently asked questions

### Is OG1.Chat free?

OG1.Chat is free to download, with no in-app purchases.

### Is ЕГЭ Биология free?

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

### Do OG1.Chat or ЕГЭ Биология have ads?

Neither OG1.Chat nor ЕГЭ Биология shows ads.

### Which is updated more often, OG1.Chat or ЕГЭ Биология?

OG1.Chat ships an update every 2 weeks, and ЕГЭ Биология every 3 months. Most recently, OG1.Chat was updated on October 17, 2026 and ЕГЭ Биология on October 5, 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.*