# SeaIce vs Secchi

The clearest difference is update cadence: SeaIce at every 3 weeks against Secchi's every 7 months. SeaIce also leads on iOS requirement (8.0 vs 15.6). 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.

SeaIce ships an update every 3 weeks, Secchi every 7 months. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | SeaIce | Secchi |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 7 months |
| Monetization | Free | — |
| Size | 70 MB | 45 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [University of Leeds](https://appshunter.io/developer/455257831) | [The Secchi Disk Foundation](https://appshunter.io/developer/1487320010) |

## What reviewers say

### SeaIce

[App page](https://appshunter.io/ios/app/seaice/id1206821514)

Visualize and interact with sea ice data from the CryoSat Mission. Track your Arctic routes, see how ice has changed, and learn about polar research. Contribute your own route data to help researchers.

**Highlights:** View Arctic ice extent and thickness data, Track real-time routes in the Arctic Circle, Import GPX tracks, Process routes with satellite ice data, Learn about polar science and research, Contribute optional route data

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Secchi

[App page](https://appshunter.io/ios/app/secchi/id1524837284)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SeaIce free?

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

### Is Secchi free?

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

### Do SeaIce or Secchi have ads?

Neither SeaIce nor Secchi shows ads.

### Which is updated more often, SeaIce or Secchi?

SeaIce ships an update every 3 weeks, and Secchi every 7 months. Most recently, SeaIce was updated on October 7, 2026 and Secchi on October 10, 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.*