Yesterdays: Memory Tracker is a privacy-centric memory tracking app designed for iPhone users. It offers a simple and fast way to jot down and remember thoughts, sayings, and feelings that might otherwise slip away. The app ensures privacy by storing data either on the device or in a private iCloud container linked to your Apple ID.

With Yesterdays, users can sync their memories across multiple iOS devices without the need for account creation. Additionally, the app allows users to add photos and audio to their memories, utilize Face ID/Touch ID protection, and enjoy features like a randomized nostalgia trip and writing reminders. Tagging memories for easy retrieval, importing previous memories via CSV, and exporting memories in a compatible format are also supported.