# GC2

> Open-source social network based on Mastodon, prioritizing freedom of speech. (iPhone/iPad app by QuadSystem Co., Ltd..)

- Source: https://appshunter.io/ios/app/gc2/id6443699816 (this page in markdown: same URL + `.md`)
- Developer: [QuadSystem Co., Ltd.](https://appshunter.io/developer/789570240)
- Category: Social Networking, Photo & Video
- Price: Free with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings
- Age rating: 12+
- Requires: iOS 15.0 · 49 MB
- Languages: American English, Arabic, Basque, Catalan, Central Kurdish, Dutch, Finnish, French (France), Scottish Gaelic, Galician and 13 more
- Released: 2022-10-23
- Data updated: 2026-06-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/gc2/id6443699816/reviews.md

## What is GC2?

GC2は、マストドンをベースに独自の改変を加えたオープンソースSNS。言論の自由を尊重したSNSアプリです。
ユーザー登録して、ご利用ください。

テキストはもちろん、画像や動画、音声ファイルを投稿して盛り上げよう
・他の人とふれ合って会話を始めましょう
・誰かフォローしてみましょう

■利用規約・プライバシーポリシーは、こちらをご覧ください。
https://gc2.jp/terms
https://gc2.jp/privacy-policy

[必要環境]
・iOS 15以上

[注意事項]
・本サービスのご利用について利用規約をご確認ください。
・最新バージョン以外はサポート対象外とさせていただきます。

## Key features

- Open-source social networking
- Mastodon-based with custom modifications
- Freedom of speech focus
- Post text, images, videos, and audio
- Follow other users
- Engage in conversations

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| GC2pro(1ヶ月) | $3.99 | per month |



## Frequently asked questions about GC2

### What is GC2?

GC2 is an open-source social networking app that is based on Mastodon with its own modifications. It prioritizes freedom of speech and allows users to post various media types and interact with others.

### What kind of content can I post on GC2?

You can post text, images, videos, and audio files on GC2. This allows for a rich and varied user experience, encouraging engagement and creativity within the community.

### What devices is GC2 compatible with?

GC2 is compatible with iOS devices, specifically requiring iOS 15 or later. This includes iPhones, iPads, and iPods.

### How often is GC2 updated?

The latest version of GC2 is 1.4.504, which was last updated on December 19, 2022. The developer indicates that versions older than the latest are not supported.

### What is the age rating for GC2?

GC2 has an age rating of 12+. This suggests that the content and interactions within the app are generally considered appropriate for users aged 12 and above.

### Does GC2 offer a subscription plan?

Yes, GC2 offers a subscription plan called GC2pro for $3.99 per month. This plan likely provides enhanced features or benefits for users who choose to subscribe.

### Where can I find the terms of service and privacy policy for GC2?

The terms of service and privacy policy for GC2 can be found at https://gc2.jp/terms and https://gc2.jp/privacy-policy, respectively. It is recommended to review these documents before using the service.

### What is the user sentiment for GC2?

GC2 has a very high rating of 5.0 stars from 3 ratings, indicating extremely positive user sentiment among its current user base.

## Version history (last 4 releases)

### 1.4.504 — 2022-12-19

・フォローしている人が投稿した時にモバイルPush通知を受け取ることができるようになりました!
・サブスクリプション購入でWeb版GC2の広告が非表示になります！

### 1.4.503 — 2022-10-25

いくつかの不具合修正

### 1.4.501 — 2022-10-22

FAQ(よくあるご質問)を追加

### 1.0 — 2022-10-21

No release notes.

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## More apps by QuadSystem Co., Ltd.

- [SkyPhone - Voice & Video Calls](https://appshunter.io/ios/app/skyphone-voice-and-video-calls/id789570237)
- [SkyTalk-AI顔認識SNS～芸能人との似顔率で検索～](https://appshunter.io/ios/app/skytalk-aisns/id1627652867)

All apps by QuadSystem Co., Ltd.: https://appshunter.io/developer/789570240

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*