Albi

Albi is an Android health tracker published by Private By Design. It sits in the same category as the fitness and wellbeing apps that log personal measurements over time, with the publisher framing privacy as the design premise rather than an added setting — a stance also reflected in their name.

What the entry data does not specify is which metrics Albi records, how history is presented, or where the data is kept. Those are the details that decide whether it fits a given routine, and they are worth reading directly from the project before adopting it. The same applies to the privacy framing: it is the publisher's stated intent, and confirming what the app actually does with your records means reading the source or the project's own policy statements.

The code is under Apache-2.0, so it can be inspected, modified and redistributed, including within proprietary software, provided attribution and licence notices remain. Android is the only listed platform, which matters if you want the same log accessible from a desktop or another device.