# 기후행동1.5℃ vs 클래스톡

The clearest difference is review sentiment: 기후행동1.5℃ at 88% against 클래스톡's 0%. 기후행동1.5℃ also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). 클래스톡's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

기후행동1.5℃ ships an update every 2 months, 클래스톡 every 3 weeks. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 기후행동1.5℃ | 클래스톡 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/15/id1537900585/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | **88.2% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 11 MB | 40 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [한국기후·환경네트워크](https://appshunter.io/developer/1537900587) | [NETBREEZE](https://appshunter.io/developer/1749925467) |

## What reviewers say

### 기후행동1.5℃

[App page](https://appshunter.io/ios/app/15/id1537900585)

This app encourages environmental action through daily challenges, quizzes, and events. It provides information on climate change and carbon neutrality, with opportunities to participate in school and citizen challenges for rewards.

**Highlights:** Monthly climate action challenges, Daily climate action quizzes, Climate change information and tips, Collaborative events with partners, School and citizen challenges with rewards

**Features:** Vision Pro support

**In-app purchases:** none


### 클래스톡

[App page](https://appshunter.io/ios/app/classtalk/id1547400547)

Stay informed about your child's school life from kindergarten to high school. Receive class notices, view academic schedules, and communicate directly with teachers through one-on-one or group chats.

**Highlights:** View class notices and school news, Access monthly academic calendars and events, 1:1 and group chat with teachers, Information for kindergarten to high school

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

**In-app purchases:** none


## Frequently asked questions

### Is 기후행동1.5℃ free?

기후행동1.5℃ is free to download, with no in-app purchases.

### Is 클래스톡 free?

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

### Do 기후행동1.5℃ or 클래스톡 have ads?

Neither 기후행동1.5℃ nor 클래스톡 shows ads.

### Which is updated more often, 기후행동1.5℃ or 클래스톡?

기후행동1.5℃ ships an update every 2 months, and 클래스톡 every 3 weeks. Most recently, 기후행동1.5℃ was updated on October 21, 2026 and 클래스톡 on October 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*