# Fluenta vs Chemicastle

The clearest difference is in-app purchases: Chemicastle at none against Fluenta's 4. Fluenta's advantage is update cadence (monthly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Fluenta sells 4 in-app purchases, starting at $6.99 per 7 days. Chemicastle asks for nothing beyond the download.

Fluenta ships an update monthly, Chemicastle every 4 months. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Fluenta | Chemicastle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Size | 47 MB | 301 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Fluenta](https://appshunter.io/developer/1811560060) | [Haute ecole pedagogique HEP-BEJUNE](https://appshunter.io/developer/1835648343) |

## What reviewers say

### Fluenta

[App page](https://appshunter.io/ios/app/fluenta-ai-language-tutor/id6745259616)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Monthly | $9.99 | per month |
| 3 Months | $26.99 | per 3 months |
| Yearly | $99.99 | per year |


### Chemicastle

[App page](https://appshunter.io/ios/app/chemicastle/id6753705536)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fluenta free?

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

### Is Chemicastle free?

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

### Do Fluenta or Chemicastle have ads?

Neither Fluenta nor Chemicastle shows ads.

### Which is updated more often, Fluenta or Chemicastle?

Fluenta ships an update monthly, and Chemicastle every 4 months. Most recently, Fluenta was updated on October 16, 2026 and Chemicastle on October 10, 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.*