# PingPongRobot vs 채점비서

The clearest difference is in-app purchases: PingPongRobot at none against 채점비서's 1. 채점비서's advantage is update cadence (every 2 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 채점비서 sells 1 one-off in-app purchase. PingPongRobot asks for nothing beyond the download.

PingPongRobot ships an update every 3 weeks, 채점비서 every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PingPongRobot | 채점비서 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | Free | — |
| Size | 148 MB | 80 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RoboRisen](https://appshunter.io/developer/1482586469) | [KANGKI SONG](https://appshunter.io/developer/6790200130) |

## What reviewers say

### PingPongRobot

[App page](https://appshunter.io/ios/app/pingpongrobot/id1482586470)

Learn robotic engineering through interactive programming. Design motion, timing, and sequences for modular robots. Assemble and control various models using intuitive app features like joystick, dancing, and drawing modes.

**Highlights:** Robotic engineering sequences, Motion, timing, and loop programming, Modular robot control, Joystick, dancing, and drawing modes, 3D modeling guide, LED color identification

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

**In-app purchases:** none


### 채점비서

[App page](https://appshunter.io/ios/app/id6790200128)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Points | $3.99 | one-time |


## Frequently asked questions

### Is PingPongRobot free?

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

### Is 채점비서 free?

채점비서 is free to download, with in-app purchases available.

### Do PingPongRobot or 채점비서 have ads?

Neither PingPongRobot nor 채점비서 shows ads.

### Which is updated more often, PingPongRobot or 채점비서?

PingPongRobot ships an update every 3 weeks, and 채점비서 every 2 days. Most recently, PingPongRobot was updated on November 3, 2026 and 채점비서 on October 31, 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.*