Health Log is a free Android app developed by Indigo Software that falls under the Lifestyle category, specifically Health & Fitness. With Health Log, you can easily track and visualize various health metrics such as weight, body temperature, blood pressure, muscle mass, exercise amount, and more.

The app provides a user-friendly interface that allows you to input and monitor your health data on a daily basis. You can manage morning and night data, and even track your body temperature with precision up to two decimal places. The data is presented in both list and graph displays, making it easy to understand your health progress over time.

In addition to the core features, Health Log offers integration with other health-related apps. You can link your exercise amount and calories burned with the "Exercise Walking" app, and also connect with the "Medication Schedule 2" and "Meal Photo" apps for comprehensive health management.

For those who prefer physical copies of their health data, Health Log includes a function to print the data or export it as a CSV file. However, a plug-in is required for printing, such as the EPSON or Canon plugin.

Furthermore, Health Log provides statistical information to help you analyze your health trends. You can access averages of standard weight, weight difference to the target weight, and various timeframes ranging from 1 week to 6 months.

With its customizable theme colors, including white, sky blue, green, yellow, orange, and pink, Health Log lets you personalize the app according to your preferences. Additionally, the app offers a data export/import function for easy transfer of data between devices.

Please note that the app allows for the management of multiple users, but this feature requires an in-app purchase.