# Ocean Pavilion vs Tahseen OPAL

The clearest difference is ads: Tahseen OPAL at none against Ocean Pavilion's shown. Tahseen OPAL also leads on device support (3 vs 1). On price, update cadence, in-app purchases and iOS requirement there is nothing between them.

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

Ocean Pavilion ships an update weekly, Tahseen OPAL every 5 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ocean Pavilion | Tahseen OPAL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 5 days** |
| Size | 141 MB | 25 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Woods Hole Oceanographic Institution](https://appshunter.io/developer/1451657947) | [Oman Energy Association](https://appshunter.io/developer/1779017016) |

## What reviewers say

### Ocean Pavilion

[App page](https://appshunter.io/ios/app/ocean-pavilion/id6471627079)

**Features:** macOS Compatibility

**In-app purchases:** none


### Tahseen OPAL

[App page](https://appshunter.io/ios/app/tahseen-opal/id6758426620)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ocean Pavilion free?

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

### Is Tahseen OPAL free?

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

### Do Ocean Pavilion or Tahseen OPAL have ads?

Ocean Pavilion shows ads; Tahseen OPAL does not.

### Which is updated more often, Ocean Pavilion or Tahseen OPAL?

Ocean Pavilion ships an update weekly, and Tahseen OPAL every 5 days. Most recently, Ocean Pavilion was updated on October 30, 2026 and Tahseen OPAL on October 31, 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.*