# TideMeasure vs The R.O.C.

The clearest difference is price: The R.O.C. at Free against TideMeasure's $19.99. The R.O.C. also leads on iOS requirement (15.6 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

The R.O.C. is free to download; TideMeasure costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TideMeasure ships an update every 2 months, The R.O.C. every 5 weeks. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TideMeasure | The R.O.C. |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tidemeasure-sea-current/id6448216978/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 14 MB | 18 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Master Sailing jdoo](https://appshunter.io/developer/1680451361) | [GEORGIOS TRIMITHIOTIS](https://appshunter.io/developer/1802361703) |

## What reviewers say

### TideMeasure

[App page](https://appshunter.io/ios/app/tidemeasure-sea-current/id6448216978)

Measure sea current speed and direction using your iPhone's GPS. Ideal for sailors, coaches, and race teams to map readings, review history, and share data for tactical advantage. Works offline.

**Highlights:** Measure current speed and direction with GPS, View results in multiple units (m/min, m/s, cm/s, knots), Map measurements across race areas, Review saved measurements and history, Create or join teams to share readings, Export measurements as CSV, Offline measurement capability

**Features:** Vision Pro support

**In-app purchases:** none


### The R.O.C.

[App page](https://appshunter.io/ios/app/the-roc/id6743344990)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TideMeasure free?

TideMeasure costs $19.99, with no in-app purchases.

### Is The R.O.C. free?

The R.O.C. is free to download, with no in-app purchases.

### Do TideMeasure or The R.O.C. have ads?

Neither TideMeasure nor The R.O.C. shows ads.

### Which is updated more often, TideMeasure or The R.O.C.?

TideMeasure ships an update every 2 months, and The R.O.C. every 5 weeks. Most recently, TideMeasure was updated on November 3, 2026 and The R.O.C. on October 25, 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.*