# CelsiUSA vs OceanTides Pro

The clearest difference is in-app purchases: OceanTides Pro at none against CelsiUSA's 1. OceanTides Pro also leads on update cadence (daily vs every 7 months). CelsiUSA's advantage is iOS requirement (16.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. CelsiUSA sells 1 one-off in-app purchase. OceanTides Pro asks for nothing beyond the download.

CelsiUSA ships an update every 7 months, OceanTides Pro daily. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | CelsiUSA | OceanTides Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Daily** |
| Size | 12 MB | 14 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Myers](https://appshunter.io/developer/1636750818) | [Julien Nicolas](https://appshunter.io/developer/1867861172) |

## What reviewers say

### CelsiUSA

[App page](https://appshunter.io/ios/app/celsiusa/id6449006027)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### OceanTides Pro

[App page](https://appshunter.io/ios/app/oceantides-pro/id6777315274)

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

**In-app purchases:** none


## Frequently asked questions

### Is CelsiUSA free?

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

### Is OceanTides Pro free?

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

### Do CelsiUSA or OceanTides Pro have ads?

Neither CelsiUSA nor OceanTides Pro shows ads.

### Which is updated more often, CelsiUSA or OceanTides Pro?

CelsiUSA ships an update every 7 months, and OceanTides Pro daily. Most recently, CelsiUSA was updated on October 18, 2026 and OceanTides Pro on October 15, 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.*