# Serenityworks vs MarineServiceTech

The clearest difference is in-app purchases: Serenityworks at none against MarineServiceTech's 2. Serenityworks also leads on iOS requirement (14.0 vs 17.0). MarineServiceTech's advantage is update cadence (every 4 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. MarineServiceTech sells 2 in-app purchases, starting at $19.99 per month. Serenityworks asks for nothing beyond the download.

Serenityworks ships an update every 3 months, MarineServiceTech every 4 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Serenityworks | MarineServiceTech |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Size | 13 MB | 9 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Keystone IT Solutions Inc](https://appshunter.io/developer/1639091434) | [Greg Bloodworth](https://appshunter.io/developer/6780279809) |

## What reviewers say

### Serenityworks

[App page](https://appshunter.io/ios/app/serenityworks/id1639523889)

**Features:** macOS Compatibility

**In-app purchases:** none


### MarineServiceTech

[App page](https://appshunter.io/ios/app/marineservicetech/id6797525838)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MarineServiceTech Subscription | $19.99 | per month |
| MarineServiceTech Subscription | $199.99 | per year |


## Frequently asked questions

### Is Serenityworks free?

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

### Is MarineServiceTech free?

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

### Do Serenityworks or MarineServiceTech have ads?

Neither Serenityworks nor MarineServiceTech shows ads.

### Which is updated more often, Serenityworks or MarineServiceTech?

Serenityworks ships an update every 3 months, and MarineServiceTech every 4 days. Most recently, Serenityworks was updated on October 27, 2026 and MarineServiceTech on October 24, 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.*