Obsidian is a powerful knowledge base available on the iPhone. Developed by Dynalist Inc., this app functions as a second brain, allowing users to access and organize their notes anytime, anywhere.

One of the standout features of Obsidian is its customizable toolbar, which allows users to personalize their note-taking experience. Additionally, the app offers pull-down quick actions, making it easy to navigate and perform tasks efficiently.

Obsidian also boasts a graph view, enabling users to visualize the connections between their notes and gain a better understanding of their knowledge base. The app supports community plugins, allowing users to enhance their experience with additional features and functionalities.

With a variety of themes to choose from, users can customize the app's appearance to suit their preferences. The sidebar pinning feature is particularly useful for tablet users, providing easy access to important notes.

Obsidian also offers iCloud vaults, ensuring that users' notes are securely stored and accessible across multiple devices.

Overall, Obsidian is a versatile and feature-rich knowledge base app that empowers users to effectively manage and organize their notes on the go.