Libi is a free lifestyle app designed for iPhone users to track their mood, energy level, menstrual cycle, and libido. Developed by Daniel Jilg, this app aims to help users become more aware of how their body works and how various factors, such as stress and workouts, influence their libidinal cycle.

With Libi, users can find connections and correlations between their mood, energy level, libido, sexual activity, and menstrual flow. The app provides beautiful charts that give a quick and glanceable idea of overall well-being, historical trends, and even statistical correlations.

Entering data in Libi is quick and easy, thanks to its attractive and streamlined user interface. The app also supports Dark Mode. Additionally, users can receive experience sampling notifications at different times each day, providing a comprehensive overview of their typical day.

Privacy and security are top priorities for Libi. The app ensures data protection by utilizing iCloud and Apple Health for syncing, with no accounts or custom syncing required. Users have the option to export their data in JSON format for backup and analysis purposes.

For those who menstruate, Libi allows for easy tracking of menstrual flow and provides insights into the cycle's influence on daily life. The app also syncs with the Apple Health App using HealthKit, enabling compatibility with other devices and secure, encrypted data storage.

Libi offers customizable data entry and display options, allowing users to prioritize the information that matters most to them. Data point types that are not relevant can be hidden, streamlining the data entry process.

Overall, Libi is a comprehensive and user-friendly app that helps individuals track and understand their libidinal cycle, menstrual flow, and overall well-being. It provides valuable insights and correlations, all while ensuring privacy and data security.