# AiMaster vs Carmen Service

The clearest difference is review sentiment: Carmen Service at 100% against AiMaster's 29%. Carmen Service also leads on rating (5.0 vs 2.3) and update cadence (weekly vs every 2 months). AiMaster's advantage is ratings volume (32 vs 2). 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.

Carmen Service holds the better App Store score, 5.0 against 2.3. That said, the two scores are not equally well evidenced: AiMaster has 32 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 29% of AiMaster's written reviews are positive against 100% of Carmen Service's.

AiMaster ships an update every 2 months, Carmen Service weekly. The most recent releases landed on October 7, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | AiMaster | Carmen Service |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (32 ratings)](https://appshunter.io/ios/app/aimaster/id668985791/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/carmen-service/id6443708620/reviews)** |
| Number of ratings | **32** | 2 |
| Positive reviews | 28.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | Free |
| Size | 33 MB | 19 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ASUSTOR Inc.](https://appshunter.io/developer/563855443) | [Service Concierge LLC](https://appshunter.io/developer/1509717127) |

## What reviewers say

### AiMaster

[App page](https://appshunter.io/ios/app/aimaster/id668985791)

Manage your network-attached storage devices remotely from your mobile device. This app offers comprehensive control over NAS setup, services, settings, and system monitoring. It also provides features for backup management and device location.

**Highlights:** One-click NAS initialization, Remote control of multiple NAS devices, Manage services and apps, Monitor system resources, Real-time system notifications, Backup job management, Find and wake up NAS

**Features:** Vision Pro support

**In-app purchases:** none


### Carmen Service

[App page](https://appshunter.io/ios/app/carmen-service/id6443708620)

Easily schedule vehicle service appointments at your preferred dealership. Book instantly, manage bookings, and find service deals with transparent pricing and duration. Reschedule or cancel without making a phone call.

**Highlights:** Instant service appointment booking, Manage bookings on the go, Find service deals, Transparent pricing and duration, Reschedule or cancel appointments

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AiMaster free?

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

### Is Carmen Service free?

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

### Which has better reviews, AiMaster or Carmen Service?

Carmen Service is rated higher. AiMaster averages 2.3 out of 5 from 32 ratings, while Carmen Service averages 5.0 from 2 ratings.

### Do AiMaster or Carmen Service have ads?

Neither AiMaster nor Carmen Service shows ads.

### Which is updated more often, AiMaster or Carmen Service?

AiMaster ships an update every 2 months, and Carmen Service weekly. Most recently, AiMaster was updated on October 7, 2026 and Carmen Service on September 17, 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.*