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1.1.0 for Android

The description of Secchi

Secchi Web is the web-based mobile interface to the Secchi Disk project enabling any seafarer to take part in a global study of the phytoplankton in our oceans. This Secchi Web App is an alternative to the native Android Secchi App. We recommend the original native Android Secchi App for most users. By using either Secchi app and taking part in the Secchi Disk study you will help us learn more about the phytoplankton at a time when their habit is altering due to climate change.

The phytoplankton in the sea, although they are invisible to the naked eye, are the ocean’s most important inhabitants since they begin the plankton food web that underpins the marine food chain. Today, there is evidence that the phytoplankton are being affected by climate change with ensuing ramifications for the life in the sea and the ecology of our planet.

Scientists need to know more about how the phytoplankton are changing both seasonally and from year to year, and this is where seafarers and the Secchi App can help out.

Along with the Secchi App, all you need do to take part is make a very simple piece of scientific equipment called a Secchi Disk and use it to record the Secchi Depth when you are at sea.

Full instructions on how to make and use a Secchi Disk and measure the Secchi Depth are included in the Secchi Web App and they can also be found at the website www.SecchiDisk.org.
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Secchi 1.1.0 Update

- Features Push Notifications.

This will be the last version of Secchi Web that will be released for Android. From 01/01/2019 this Secchi Web application will be removed from the app store in favour of the native Secchi app that allows photographs and has a better user interface. To keep your same user id please note it and enter it into your new Secchi app. You can download the Android Secchi app from here:


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Additional Information

Previous versions
  • V1.1.0 40.6 MB APK



    Secchi 1.1.0 (101002)

    Update on: 2018-09-20

    Requires Android: Android 4.4+ (Kitkat, API 19)

    Signature: cc06730b76865c6a8c2beac13214a4ffc9083eab Secchi 1.1.0(101002) safe verified

    File SHA1: 370f5b40f6f4394f719f8a5d7e34afc50b7f0e29

    File Size: 40.6 MB

    What's new:


  • V1.0.0 35.1 MB APK



    Secchi 1.0.0 (100002)

    Update on: 2016-08-01

    Requires Android: Android 4.1+ (Jelly Bean, API 16)

    Signature: cc06730b76865c6a8c2beac13214a4ffc9083eab Secchi 1.0.0(100002) safe verified

    File SHA1: 837fc2694211bec7a356ed0ada3c9f6e3410ed0b

    File Size: 35.1 MB


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