# MAMP Viewer vs System Designer

The clearest difference is review sentiment: System Designer at 78% against MAMP Viewer's 34%. System Designer also leads on update cadence (monthly vs every 9 months) and rating (4.4 vs 4.0). MAMP Viewer's advantage is ratings volume (232 vs 17). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

System Designer holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: MAMP Viewer has 232 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 34% of MAMP Viewer's written reviews are positive against 78% of System Designer's.

MAMP Viewer ships an update every 9 months, System Designer monthly. The most recent releases landed on September 23, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | MAMP Viewer | System Designer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (232 ratings)](https://appshunter.io/ios/app/mamp-viewer/id1047237620/reviews) | **[4.4 (17 ratings)](https://appshunter.io/ios/app/system-designer/id1132983280/reviews)** |
| Number of ratings | **232** | 17 |
| Positive reviews | 33.6% of reviews | **77.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Monetization | Free | Free |
| Size | 5 MB | 7 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MAMP GmbH](https://appshunter.io/developer/1451068672) | [Erwan Carriou](https://appshunter.io/developer/1102494853) |

## What reviewers say

### MAMP Viewer

[App page](https://appshunter.io/ios/app/mamp-viewer/id1047237620)

This app allows web developers to preview and test local websites directly on their iOS devices. It offers real-time previews, easy setup, and automatic WLAN transfer for seamless development on the go.

**Highlights:** Real-time website preview, Easy setup for MAMP sites, Supports HTML, CSS, JavaScript, PHP, Automatic WLAN project transfer, Intuitive user interface

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

**In-app purchases:** none

**What reviewers like**

- 👍 Useful for remembering development addresses
- 👍 Convenient for local mobile testing
- 👍 Good for productivity
- 👍 Works well with MAMP Pro
- 👍 Handy for testing mobile versions

**What reviewers complain about**

- 🐛 Doesn't work at all
- 🐛 Fails to load hosts
- 🐛 Error loading page
- 🐛 Aggressively cached CSS
- 🐛 Not working with WordPress

**Reported bugs**

- No MAMP Pro hosts found
- Error loading page: Mamp viewer is not able to load the requested page
- CSS files aggressively cached, no way to turn off or empty
- All resolution options grayed out in MAMP Pro General tab
- App has stopped working

**Requested features**

- Update user interface
- Add URL bar for manual entry
- Improve WordPress support
- Fix SSL certificate issues
- Add tutorial video for setup


### System Designer

[App page](https://appshunter.io/ios/app/system-designer/id1132983280)

Design complex systems using a low-code platform that leverages UML standards. Generate code skeletons and manage components graphically. Run and test your system with dynamic type checking.

**Highlights:** UML-based system modeling, Code skeleton generation, Graphical component creation, MSON format for model definition, Dynamic type checking, Cross-device synchronization via GitHub

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MAMP Viewer free?

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

### Is System Designer free?

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

### Which has better reviews, MAMP Viewer or System Designer?

System Designer is rated higher. MAMP Viewer averages 4.0 out of 5 from 232 ratings, while System Designer averages 4.4 from 17 ratings.

### Do MAMP Viewer or System Designer have ads?

Neither MAMP Viewer nor System Designer shows ads.

### Which is updated more often, MAMP Viewer or System Designer?

MAMP Viewer ships an update every 9 months, and System Designer monthly. Most recently, MAMP Viewer was updated on September 23, 2026 and System Designer on September 18, 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.*