# Learn CSS vs Fluent Duo

The clearest difference is in-app purchases: Fluent Duo at none against Learn CSS's 1. Learn CSS's advantage is update cadence (every 2 weeks vs every 3 months) and iOS requirement (12.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Learn CSS sells 1 one-off in-app purchase. Fluent Duo asks for nothing beyond the download.

Learn CSS ships an update every 2 weeks, Fluent Duo every 3 months. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Learn CSS | Fluent Duo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fluent-duo-couples-language/id6758634133/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | — | Free |
| Size | 46 MB | 34 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ahmad Masood](https://appshunter.io/developer/1809316932) | [ANIELLO DI POLITO](https://appshunter.io/developer/1822838772) |

## What reviewers say

### Learn CSS

[App page](https://appshunter.io/ios/app/learn-css-guide/id6755455390)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CSS Pro | $1.99 | one-time |


### Fluent Duo

[App page](https://appshunter.io/ios/app/fluent-duo-couples-language/id6758634133)

This app helps couples learn each other's language through short, daily voice recordings and corrections. It focuses on personal language use and mutual motivation, making learning engaging and effective for partners in long-distance relationships or mixed-language households.

**Highlights:** Daily voice note prompts, Partner voice recordings, One-tap reactions, Optional audio corrections, Shared learning streak, Personalized language learning

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Learn CSS free?

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

### Is Fluent Duo free?

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

### Do Learn CSS or Fluent Duo have ads?

Neither Learn CSS nor Fluent Duo shows ads.

### Which is updated more often, Learn CSS or Fluent Duo?

Learn CSS ships an update every 2 weeks, and Fluent Duo every 3 months. Most recently, Learn CSS was updated on October 30, 2026 and Fluent Duo on October 28, 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.*