# Mastery vs devdex

The clearest difference is in-app purchases: Mastery at none against devdex's 2. Mastery also leads on update cadence (every 8 days vs every 3 weeks) and iOS requirement (9.0 vs 15.1). devdex's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. devdex sells 2 in-app purchases, starting at $4.99 per month. Mastery asks for nothing beyond the download.

Mastery ships an update every 8 days, devdex every 3 weeks. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Mastery | devdex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/devdex/id6478421422/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 56 MB | 41 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yudai Abe](https://appshunter.io/developer/1566818989) | [Trevor Pennington](https://appshunter.io/developer/1514673614) |

## What reviewers say

### Mastery

[App page](https://appshunter.io/ios/app/mastery-record-of-experience/id1630509513)

**Features:** macOS Compatibility

**In-app purchases:** none


### devdex

[App page](https://appshunter.io/ios/app/devdex/id6478421422)

This app helps developers practice coding syntax for JavaScript, TypeScript, and Swift. It offers over 200 questions, tracks your progress with a weekly streak, and provides statistics on accuracy and quantity. Links to official language documentation are also included.

**Highlights:** JavaScript, TypeScript, Swift support, Over 200 practice questions, Weekly streak tracker, Accuracy and quantity statistics, Links to language documentation

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Devdex Monthly | $4.99 | per month |
| Devdex - Yearly | $34.99 | per year |


## Frequently asked questions

### Is Mastery free?

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

### Is devdex free?

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

### Do Mastery or devdex have ads?

Mastery shows ads; devdex does not.

### Which is updated more often, Mastery or devdex?

Mastery ships an update every 8 days, and devdex every 3 weeks. Most recently, Mastery was updated on October 10, 2026 and devdex on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*