# 云谷课堂教师端 vs Adder

The clearest difference is device support: Adder at 3 against 云谷课堂教师端's 1. 云谷课堂教师端's advantage is iOS requirement (13.0 vs 15.6). 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.

云谷课堂教师端 ships an update every 2 weeks, Adder weekly. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 云谷课堂教师端 | Adder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/adder-by-mather/id6742083110/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 143 MB | 0 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yungu](https://appshunter.io/developer/1393818280) | [David Kelen](https://appshunter.io/developer/1796712157) |

## What reviewers say

### 云谷课堂教师端

[App page](https://appshunter.io/ios/app/id1493760817)

**Features:** macOS Compatibility

**In-app purchases:** none


### Adder

[App page](https://appshunter.io/ios/app/adder-by-mather/id6742083110)

This app offers interactive exercises and customizable practice sessions to help students master addition. It features progress tracking and a distraction-free interface, making it ideal for building foundational math skills.

**Highlights:** Interactive addition exercises, Customizable practice sessions, Progress tracking, Distraction-free interface, Tailored learning experience

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 云谷课堂教师端 free?

云谷课堂教师端 is free to download, with no in-app purchases.

### Is Adder free?

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

### Do 云谷课堂教师端 or Adder have ads?

Neither 云谷课堂教师端 nor Adder shows ads.

### Which is updated more often, 云谷课堂教师端 or Adder?

云谷课堂教师端 ships an update every 2 weeks, and Adder weekly. Most recently, 云谷课堂教师端 was updated on October 26, 2026 and Adder on October 28, 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.*