# Mini Secchi

> Mini Secchi (iPhone/iPad app by DDQ.)

- Source: https://appshunter.io/ios/app/mini-secchi/id1587116779 (this page in markdown: same URL + `.md`)
- Developer: [DDQ](https://appshunter.io/developer/418328467)
- Category: Education, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 78 MB
- Languages: American English
- Released: 2022-04-05
- Data updated: 2026-08-16
- User reviews in markdown: https://appshunter.io/ios/app/mini-secchi/id1587116779/reviews.md

## What is Mini Secchi?

The Secchi disk is a white disk that is lowered into the water and the depth at which it disappears and reappears from sight is logged. This depth is proportional to the clarity or transparency of the water. The Forel Ule colour scale is used to classify the colour of natural waters.It consists of 21 colours ranging from blue to green to yellow to brown, and is used alongside the Secchi disk with the observer typically recording the colour of a submerged Secchi disk with this app. The app will guide you through each measurement, store location data, photos and additional observations.


## Version history (last 5 releases)

### 2.9 — 2024-11-09

Added user feedback after submit, more bug fixes

### 2.7.2 — 2024-10-11

Fixes a bug with pH value not sent to pml

### 2.7.1 — 2024-09-25

Bug fixes

### 2.7 — 2024-09-22

Improved layout, helper tools.
Quick Forel Ule picker (using the camera)
Better sign up / log in experience.
Bug fixes

### 2.5 — 2024-09-18

My measurements
Improved GPS
Map support
Offline support

## More apps by DDQ

- [Mijn Hemel](https://appshunter.io/ios/app/mijn-hemel/id419104939)
- [iSPEX](https://appshunter.io/ios/app/ispex/id584360175)
- [pneumonia](https://appshunter.io/ios/app/pneumonia/id584360843)
- [Triatlas](https://appshunter.io/ios/app/triatlas/id592681081)
- [Dark Sky Meter](https://appshunter.io/ios/app/dark-sky-meter/id602989060)
- [Loss of the night](https://appshunter.io/ios/app/loss-of-the-night/id928440562)

All apps by DDQ: https://appshunter.io/developer/418328467

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*