# 123MC vs SejlSikkert Alarm

The clearest difference is ads: SejlSikkert Alarm at none against 123MC's shown. SejlSikkert Alarm also leads on monetization model (free vs ad-supported). 123MC's advantage is update cadence (every 2 months vs every 11 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

123MC ships an update every 2 months, SejlSikkert Alarm every 11 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | 123MC | SejlSikkert Alarm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sejlsikkert-alarm/id1451966411/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 11 months |
| Monetization | Ad-supported | **Free** |
| Size | 53 MB | 5 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [123Motor](https://appshunter.io/developer/986685766) | [Søfartsstyrelsen](https://appshunter.io/developer/482582313) |

## What reviewers say

### 123MC

[App page](https://appshunter.io/ios/app/123mc/id986685767)

Discover Denmark's largest marketplace for motorcycles. Easily buy or sell bikes, search over 7,000 listings with advanced filters, and save favorites. Compare prices and find great deals on new and used motorcycles.

**Highlights:** List motorcycles for sale, Fast motorcycle search, Advanced search criteria, Save favorite motorcycles, Save search agents, Share listings with friends, View directions to seller

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

**In-app purchases:** none


### SejlSikkert Alarm

[App page](https://appshunter.io/ios/app/sejlsikkert-alarm/id1451966411)

This app allows maritime users to register vessels and plan journeys. It offers sail plan and track-only modes, with features like real-time location sharing, trip history, and emergency assistance calls. It also provides access to maritime information and personalized checklists.

**Highlights:** Vessel and journey registration, Sail plan and track-only modes, Real-time location sharing, Emergency and assistance calls, Trip history with video playback, Maritime information access, Personalized trip checklists

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 123MC free?

123MC is free to download, with no in-app purchases.

### Is SejlSikkert Alarm free?

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

### Do 123MC or SejlSikkert Alarm have ads?

123MC shows ads; SejlSikkert Alarm does not.

### Which is updated more often, 123MC or SejlSikkert Alarm?

123MC ships an update every 2 months, and SejlSikkert Alarm every 11 months. Most recently, 123MC was updated on November 6, 2026 and SejlSikkert Alarm on November 2, 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.*