# DUS Master vs Within

The clearest difference is in-app purchases: DUS Master at none against Within's 2. DUS Master also leads on update cadence (every 10 days vs every 4 weeks) and iOS requirement (14.0 vs 18.2). On price, ads and device support there is nothing between them.

Both are free to download. Within sells 2 in-app purchases, starting at $1.99 per 7 days. DUS Master asks for nothing beyond the download.

DUS Master ships an update every 10 days, Within every 4 weeks. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | DUS Master | Within |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dus-master/id6474985706/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 90.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 4 weeks |
| Monetization | Free | — |
| Size | 33 MB | 12 MB |
| Requires iOS | **14.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Ahmet Ay](https://appshunter.io/developer/1185833917) | [Ayca Badem Ergin](https://appshunter.io/developer/1850284275) |

## What reviewers say

### DUS Master

[App page](https://appshunter.io/ios/app/dus-master/id6474985706)

This app streamlines the DUS exam preparation and application process. It offers tools for studying, performance analysis, and preference simulation, helping users manage their DUS journey effectively.

**Highlights:** DUS Timer, Study Calendar & Analysis, Study Groups, Performance School, Preference Simulation, Branch Statistics, Score & Ranking Calculation

**Features:** macOS Compatibility

**In-app purchases:** none


### Within

[App page](https://appshunter.io/ios/app/within-mindful-app-blocker/id6759969673)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly subscription | $1.99 | per 7 days |
| Yearly subscription | $29.99 | per year |


## Frequently asked questions

### Is DUS Master free?

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

### Is Within free?

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

### Do DUS Master or Within have ads?

Neither DUS Master nor Within shows ads.

### Which is updated more often, DUS Master or Within?

DUS Master ships an update every 10 days, and Within every 4 weeks. Most recently, DUS Master was updated on October 15, 2026 and Within on October 1, 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.*