# Coastal Observer | SPOTTERON vs Mini Secchi

The clearest difference is update cadence: Mini Secchi at every 5 weeks against Coastal Observer | SPOTTERON's every 4 months. Coastal Observer | SPOTTERON's advantage is iOS requirement (12.0 vs 15.0). 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.

Coastal Observer | SPOTTERON ships an update every 4 months, Mini Secchi every 5 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | Coastal Observer | SPOTTERON | Mini Secchi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (10 ratings)](https://appshunter.io/ios/app/coastal-observer-spotteron/id1475663669/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 62 MB | 22 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SPOTTERON Gmbh](https://appshunter.io/developer/1378099707) | [DDQ](https://appshunter.io/developer/418328467) |

## What reviewers say

### Coastal Observer | SPOTTERON

[App page](https://appshunter.io/ios/app/coastal-observer-spotteron/id1475663669)

This app empowers citizens to monitor local weather and water conditions, contributing to climate change research. Users can document environmental observations, weather impacts, water levels, and water quality to help build a sustainable future.

**Highlights:** Environmental observations, Weather documentation, Water level measurement, Water quality monitoring, Photo documentation, Educational curriculum integration

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

**In-app purchases:** none


### Mini Secchi

[App page](https://appshunter.io/ios/app/mini-secchi/id1587116779)

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

**In-app purchases:** none


## Frequently asked questions

### Is Coastal Observer | SPOTTERON free?

Coastal Observer | SPOTTERON is free to download, with no in-app purchases.

### Is Mini Secchi free?

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

### Do Coastal Observer | SPOTTERON or Mini Secchi have ads?

Neither Coastal Observer | SPOTTERON nor Mini Secchi shows ads.

### Which is updated more often, Coastal Observer | SPOTTERON or Mini Secchi?

Coastal Observer | SPOTTERON ships an update every 4 months, and Mini Secchi every 5 weeks. Most recently, Coastal Observer | SPOTTERON was updated on November 3, 2026 and Mini Secchi on November 3, 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.*