# Open MobileUI vs Devmaxx

The clearest difference is rating: Devmaxx at 4.3 against Open MobileUI's 2.6. Devmaxx also leads on ratings volume (520 vs 15) and review sentiment (18% vs 0%). Open MobileUI's advantage is in-app purchases (none vs 2) and update cadence (every 5 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Devmaxx sells 2 in-app purchases, starting at $8.99 per month. Open MobileUI asks for nothing beyond the download.

Devmaxx holds the better App Store score, 4.3 against 2.6. That said, the two scores are not equally well evidenced: Devmaxx has 520 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 0% of Open MobileUI's written reviews are positive against 18% of Devmaxx's.

Open MobileUI ships an update every 5 days, Devmaxx every 2 weeks. The most recent releases landed on September 30, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Open MobileUI | Devmaxx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (15 ratings)](https://appshunter.io/ios/app/open-mobileui/id6754266176/reviews) | **[4.3 (520 ratings)](https://appshunter.io/ios/app/devmaxx/id6758278144/reviews)** |
| Number of ratings | 15 | **520** |
| Positive reviews | 0.0% of reviews | **18.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 weeks |
| Monetization | **Free** | Subscription |
| Size | 67 MB | 29 MB |
| Requires iOS | **16.4** | 17.5 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Ronas IT OU](https://appshunter.io/developer/1155581652) | [Arjay McCandless LLC](https://appshunter.io/developer/1871931520) |

## What reviewers say

### Open MobileUI

[App page](https://appshunter.io/ios/app/open-mobileui/id6754266176)

Access your self-hosted AI assistant on mobile with a smooth, modern, and privacy-focused client. Enjoy native performance, smart synchronization, and a mobile-first interface for productivity on the go.

**Highlights:** Native performance, Mobile-first interface, Automatic synchronization, Image uploads and file attachments, System-aware dark mode, Secure credential storage

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

**In-app purchases:** none


### Devmaxx

[App page](https://appshunter.io/ios/app/devmaxx/id6758278144)

This app provides a daily system design question to help software engineers master essential skills for interviews and career growth. It offers clear explanations, linked resources, and a private community for learning and practice.

**Highlights:** Daily system design questions, Clear explanations and answer breakdowns, Linked learning resources, Access to previous questions, Private developer community, Progress tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Devmaxx Subscription | $8.99 | per month |
| Annual Devmaxx Subscription | $59.99 | per year |


## Frequently asked questions

### Is Open MobileUI free?

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

### Is Devmaxx free?

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

### Which has better reviews, Open MobileUI or Devmaxx?

Devmaxx is rated higher. Open MobileUI averages 2.6 out of 5 from 15 ratings, while Devmaxx averages 4.3 from 520 ratings.

### Do Open MobileUI or Devmaxx have ads?

Neither Open MobileUI nor Devmaxx shows ads.

### Which is updated more often, Open MobileUI or Devmaxx?

Open MobileUI ships an update every 5 days, and Devmaxx every 2 weeks. Most recently, Open MobileUI was updated on September 30, 2026 and Devmaxx on October 13, 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.*