# Ship Tracker vs Knot/Knop Meter

The clearest difference is in-app purchases: Knot/Knop Meter at none against Ship Tracker's 6. Knot/Knop Meter also leads on update cadence (daily vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ship Tracker sells 6 in-app purchases, starting at $4.99 per 7 days. Knot/Knop Meter asks for nothing beyond the download.

Ship Tracker ships an update every 6 weeks, Knot/Knop Meter daily. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Ship Tracker | Knot/Knop Meter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Daily** |
| Size | 56 MB | 10 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [APPMERGE TEKNOLOJI LIMITED SIRKETI](https://appshunter.io/developer/1822845284) | [OFL AS](https://appshunter.io/developer/6785120538) |

## What reviewers say

### Ship Tracker

[App page](https://appshunter.io/ios/app/ship-tracker-ais-map/id6763819005)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Pro | $4.99 | per 7 days |
| Weekly Pro | $4.99 | per 7 days |
| Premium Pro | $7.99 | per 7 days |
| Premium Pro | $9.99 | per 7 days |
| Premium Access | $29.99 | per year |
| Yearly Pro | $39.99 | per year |


### Knot/Knop Meter

[App page](https://appshunter.io/ios/app/knotknop-meter/id6785120535)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ship Tracker free?

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

### Is Knot/Knop Meter free?

Knot/Knop Meter is free to download, with no in-app purchases.

### Do Ship Tracker or Knot/Knop Meter have ads?

Neither Ship Tracker nor Knot/Knop Meter shows ads.

### Which is updated more often, Ship Tracker or Knot/Knop Meter?

Ship Tracker ships an update every 6 weeks, and Knot/Knop Meter daily. Most recently, Ship Tracker was updated on October 10, 2026 and Knot/Knop Meter on October 7, 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.*