# RustAcademy vs CFA ESG Sustainable Prep

The clearest difference is price: CFA ESG Sustainable Prep at Free against RustAcademy's $6.99. RustAcademy's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

CFA ESG Sustainable Prep is free to download; RustAcademy costs $6.99 up front. CFA ESG Sustainable Prep sells 1 one-off in-app purchase. RustAcademy asks for nothing beyond the download.

## The numbers

| Metric | RustAcademy | CFA ESG Sustainable Prep |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | — |
| Monetization | Paid | — |
| Size | 54 MB | 828 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [SimTeCon GmbH](https://appshunter.io/developer/1761797043) | [JS INSIGHTS LTD](https://appshunter.io/developer/6789363259) |

## What reviewers say

### RustAcademy

[App page](https://appshunter.io/ios/app/rustacademy/id6740005880)

Learn Rust programming through focused, bite-sized lessons and daily challenges. Master core concepts, algorithms, and syntax with guided practice and code reading. Ideal for developers seeking a deeper understanding of Rust.

**Highlights:** Bite-sized Rust lessons, Guided practice and code reading, Daily recall challenges, Structured algorithm track, Code completion exercises, Favorite module saving

**Features:** macOS Compatibility

**In-app purchases:** none


### CFA ESG Sustainable Prep

[App page](https://appshunter.io/ios/app/cfa-esg-sustainable-prep/id6814008231)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Complete 2026 Practice | $9.99 | one-time |


## Frequently asked questions

### Is RustAcademy free?

RustAcademy costs $6.99, with no in-app purchases.

### Is CFA ESG Sustainable Prep free?

CFA ESG Sustainable Prep is free to download, with in-app purchases available.

### Do RustAcademy or CFA ESG Sustainable Prep have ads?

CFA ESG Sustainable Prep shows ads; RustAcademy does not.

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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.*