# VIETSTEM vs VEXcode 123

The clearest difference is in-app purchases: VEXcode 123 at none against VIETSTEM's 1. VEXcode 123 also leads on update cadence (every 4 months vs every 24 months). VIETSTEM's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.0). On price and ads there is nothing between them.

Both are free to download. VIETSTEM sells 1 one-off in-app purchase. VEXcode 123 asks for nothing beyond the download.

VIETSTEM ships an update every 24 months, VEXcode 123 every 4 months. The most recent releases landed on September 30, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | VIETSTEM | VEXcode 123 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 4 months** |
| Size | 12 MB | 408 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [INSTITUTE VIETSTEM COMPANY LIMITED](https://appshunter.io/developer/1484787821) | [VEX Robotics, Inc.](https://appshunter.io/developer/1162973741) |

## What reviewers say

### VIETSTEM

[App page](https://appshunter.io/ios/app/vietstem/id1484973725)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 12 Tháng | $36.99 | one-time |


### VEXcode 123

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

**In-app purchases:** none


## Frequently asked questions

### Is VIETSTEM free?

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

### Is VEXcode 123 free?

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

### Do VIETSTEM or VEXcode 123 have ads?

Neither VIETSTEM nor VEXcode 123 shows ads.

### Which is updated more often, VIETSTEM or VEXcode 123?

VIETSTEM ships an update every 24 months, and VEXcode 123 every 4 months. Most recently, VIETSTEM was updated on September 30, 2026 and VEXcode 123 on October 13, 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.*