You can fetch standalone version of this app from link bellow. We're using js-xlsx to read the files so any format supported by that library is also supported by this library.
To be able to provide the standalone version for different operating systems we've wrapped this library with electron. Source code for this app is publicly available here.
First prepare spreadsheet with the data you want to label. It can have data something like this:
id | data gathered | species |
---|---|---|
1 | 2019-01-02 | Parus major |
2 | 2019-02-03 | Sciurus vulgaris |