# Oceanodesy vs Clavis

The clearest difference is update cadence: Clavis at every 5 days against Oceanodesy's every 4 weeks. Oceanodesy's advantage is iOS requirement (8.1 vs 16.2). On price, ads, in-app purchases and device support there is nothing between them.

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

Oceanodesy ships an update every 4 weeks, Clavis every 5 days. The most recent releases landed on October 1, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Oceanodesy | Clavis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (6 ratings)](https://appshunter.io/ios/app/oceanodesy/id513043669/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 5 MB | 31 MB |
| Requires iOS | **8.1** | 16.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Oceaneering International, Inc.](https://appshunter.io/developer/1262887736) | [Pedro Henrique Oliveira Sousa](https://appshunter.io/developer/1875393541) |

## What reviewers say

### Oceanodesy

[App page](https://appshunter.io/ios/app/oceanodesy/id513043669)

This utility app converts between geodetic and grid coordinate systems. It supports various units for latitude, longitude, and grid coordinates, along with multiple datums and projections for accurate geospatial transformations.

**Highlights:** Geodetic to grid coordinate conversion, Grid to geodetic coordinate conversion, Multiple latitude/longitude formats (DD, DMM, DMS), Multiple grid coordinate units (US Feet, Intl Feet, Meters), Support for multiple datums (WGS84, NAD27, NAD83, etc.), Support for multiple projections (UTM, SPCS27, SPCS83), Store and export projected coordinates

**Features:** macOS Compatibility

**In-app purchases:** none


### Clavis

[App page](https://appshunter.io/ios/app/clavis-planetary-clock/id6758866461)

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

**In-app purchases:** none


## Frequently asked questions

### Is Oceanodesy free?

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

### Is Clavis free?

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

### Do Oceanodesy or Clavis have ads?

Neither Oceanodesy nor Clavis shows ads.

### Which is updated more often, Oceanodesy or Clavis?

Oceanodesy ships an update every 4 weeks, and Clavis every 5 days. Most recently, Oceanodesy was updated on October 1, 2026 and Clavis on October 5, 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.*