# ERB CTP Online vs VEXcode 123

The clearest difference is update cadence: VEXcode 123 at every 4 months against ERB CTP Online's every 8 months. ERB CTP Online's advantage is iOS requirement (10.2 vs 16.0). 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.

ERB CTP Online ships an update every 8 months, VEXcode 123 every 4 months. Both last shipped on October 13, 2026.

## The numbers

| Metric | ERB CTP Online | VEXcode 123 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.6 (290 ratings)](https://appshunter.io/ios/app/erb-ctp-online/id555673248/reviews)** | — |
| Number of ratings | **290** | — |
| Positive reviews | 19.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 6 MB | 408 MB |
| Requires iOS | **10.2** | 16.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Internet Testing Systems (ITS)](https://appshunter.io/developer/546817214) | [VEX Robotics, Inc.](https://appshunter.io/developer/1162973741) |

## What reviewers say

### ERB CTP Online

[App page](https://appshunter.io/ios/app/erb-ctp-online/id555673248)

This app provides a battery of assessments in listening, reading, vocabulary, writing, and mathematics. It offers instant scoring and feedback for real-time guidance on student learning. The program also includes tests for verbal and quantitative reasoning.

**Highlights:** Listening assessment, Reading assessment, Vocabulary and writing tests, Mathematics assessment, Verbal and quantitative reasoning tests, Instant scoring and feedback

**In-app purchases:** none

**What reviewers like**

- 🤩 Engaging and addictive gameplay
- 🎓 Helpful educational content
- 👍 Intuitive user interface

**What reviewers complain about**

- 🐛 Frequent crashes and technical issues
- 🕰️ Excessively long and tedious tests
- 💤 Boring and uninspired design
- 🔒 Locked device during testing

**Reported bugs**

- Freezing and lagging during tests
- Inability to exit the app during testing
- Compatibility issues with older devices

**Requested features**

- Improved graphics and visuals
- Customizable controls and settings
- More engaging and interactive learning experiences


### VEXcode 123

[App page](https://appshunter.io/ios/app/vexcode-123/id1501755917)

**In-app purchases:** none


## Frequently asked questions

### Is ERB CTP Online free?

ERB CTP Online is free to download, with no in-app purchases.

### Is VEXcode 123 free?

VEXcode 123 is free to download, with no in-app purchases.

### Do ERB CTP Online or VEXcode 123 have ads?

Neither ERB CTP Online nor VEXcode 123 shows ads.

### Which is updated more often, ERB CTP Online or VEXcode 123?

ERB CTP Online ships an update every 8 months, and VEXcode 123 every 4 months. Most recently, ERB CTP Online was updated on October 13, 2026 and VEXcode 123 on October 13, 2026.

---

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