# AIbert X vs STEMQuest

The clearest difference is in-app purchases: STEMQuest at none against AIbert X's 2. AIbert X's advantage is update cadence (every 11 days vs every 4 weeks) and iOS requirement (15.1 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. AIbert X sells 2 in-app purchases, starting at $5.99 per month. STEMQuest asks for nothing beyond the download.

AIbert X ships an update every 11 days, STEMQuest every 4 weeks. The most recent releases landed on September 15, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | AIbert X | STEMQuest |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 4 weeks |
| Size | 93 MB | 7 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Raul Rambo](https://appshunter.io/developer/1763305098) | [HANG ZHENG](https://appshunter.io/developer/1871954264) |

## What reviewers say

### AIbert X

[App page](https://appshunter.io/ios/app/aibert-x/id6751193295)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium — Monthly | $5.99 | per month |
| Premium Trial — Monthly | $5.99 | per month |


### STEMQuest

[App page](https://appshunter.io/ios/app/stemquest/id6758280282)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AIbert X free?

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

### Is STEMQuest free?

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

### Do AIbert X or STEMQuest have ads?

Neither AIbert X nor STEMQuest shows ads.

### Which is updated more often, AIbert X or STEMQuest?

AIbert X ships an update every 11 days, and STEMQuest every 4 weeks. Most recently, AIbert X was updated on September 15, 2026 and STEMQuest on September 7, 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.*