[artnc]

Author here! I had searched around but didn't find any existing app that matched my requirements. A few that immediately come to mind:

1. I have sole ownership of the data

2. The data is stored in an easily parsable format (TSV)

3. Duplicating a recent activity takes one tap

4. Pie and area charts are displayed in the app

My app is open source and available on GitHub[1] for any Android developer to compile for themselves, but if there's enough interest I can also get around to packaging it up for the Play Store/F-Droid/etc.

[1]: https://github.com/artnc/chronofile

[artnc]

I've just uploaded an APK: https://github.com/artnc/chronofile/releases