Secchi
The Secchi Disk Foundation Education iPhoneiPad
Secchi is a free Education app for iPhone and iPad by The Secchi Disk Foundation. Requires iOS 15.6. Updated May 26, 2026.
- Price
- Free
- on the App Store
- Size
- 45 MB
- Age 4+
- Updated
- May 26
- 2026 · v1.6.0
Screenshots
About Secchi
Climate change is threatening the phytoplankton that underpins the marine food chain. We must understand why before it's too late. Secchi enables you to take part in the Secchi Disk citizen science study and help collect essential data on the phytoplankton.
What’s new
Version 1.6.0 · Updated May 26, 2026
Internal improvements to prepare for iOS 27
App privacy
The developer, The Secchi Disk Foundation, reported these privacy practices to Apple.
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Location: Precise Location
- Other Data: Other Data Types
Used for: Other Purposes
Alternatives to Secchi
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Secchi | – | Free | May 26, 2026 | |
| iNaturalist | 4.1 / 5 (714) | Free | Oct 21, 2026 | Compare |
| Merlin Bird ID by Cornell Lab | 4.9 / 5 (113,886) | Free | Oct 9, 2026 | Compare |
| British Museum Audio | 4.7 / 5 (1,783) | Free | Oct 9, 2026 | Compare |
| Seek by iNaturalist | 4.8 / 5 (30,916) | Free | Sep 30, 2026 | Compare |
| Satellite Tracker by Star Walk | 4.6 / 5 (70,353) | Free | Oct 16, 2026 | Compare |
| edX online learning | 4.8 / 5 (10,783) | Free | Sep 22, 2026 | Compare |
Compare Secchi with the top alternatives: ratings, updates, ASO score and keyword gaps →