# 00 vs OpenWater

The clearest difference is update cadence: 00 at daily against OpenWater's every 4 days. 00 also leads on iOS requirement (10.0 vs 18.0). OpenWater's advantage is device support (4 vs 2) and ratings volume (3 vs 1). On price, rating, ads and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for 00 against 5.0 for OpenWater. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

00 ships an update daily, OpenWater every 4 days. The most recent releases landed on September 19, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | 00 | OpenWater |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/0037/id1441908337/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/openwater-water-speed/id6796586875/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 4 days |
| Monetization | Free | Free |
| Size | 28 MB | 22 MB |
| Requires iOS | **10.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple TV, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Adriaan de Jongh](https://appshunter.io/developer/965628077) | [Laan Labs](https://appshunter.io/developer/310916919) |

## What reviewers say

### 00

[App page](https://appshunter.io/ios/app/0037/id1441908337)

This workout tool allows you to create custom exercise routines with timers, reminders, and notes. Track your progress by saving sessions and viewing your improvements over time. It's a free, personal project designed for users who know their own exercises.

**Highlights:** Customizable exercise display, Metronome and reminder setup, Exercise tagging and notes, Create sets and routines, Save and track session progress

**In-app purchases:** none


### OpenWater

[App page](https://appshunter.io/ios/app/openwater-water-speed/id6796586875)

Track your speed and technique for various watersports using GPS. This open-source app works offline and offers detailed performance metrics for wingfoiling, kitesurfing, and more. Analyze your sessions with advanced visualization tools.

**Highlights:** GPS speed and technique tracking, Offline functionality, Standalone Apple Watch app, Detailed speed metrics, Session visualization tools, Data import/export

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

**In-app purchases:** none


## Frequently asked questions

### Is 00 free?

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

### Is OpenWater free?

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

### Which has better reviews, 00 or OpenWater?

00 and OpenWater are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do 00 or OpenWater have ads?

Neither 00 nor OpenWater shows ads.

### Which is updated more often, 00 or OpenWater?

00 ships an update daily, and OpenWater every 4 days. Most recently, 00 was updated on September 19, 2026 and OpenWater on September 18, 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.*