Mental: Mood Tracker & Journal is a private mood tracking and journaling application designed for iPhone. Its primary function is to allow users to record their emotional state in a brief, low-pressure check-in process. A typical check-in involves selecting from a grid of forty-nine feelings and optionally adding a short written note, with the entire interaction designed to take approximately ten seconds. The app includes a streak feature that marks continuity without penalizing users for missed days, aiming to reduce the sense of obligation or judgment around daily tracking. The application stores all user data locally on the iPhone and in the user’s private iCloud account, emphasizing data privacy and user control. Over time, Mental employs a memory layer that remembers past entries, revises its understanding as the user’s life changes, and occasionally surfaces relevant past moments. Users can correct or delete memories, and optional features remain at the user’s discretion. The app’s main data handling practices are explained within its privacy policy and terms of use, which also include a health and artificial intelligence disclaimer. Additional features include an emotion grid for selecting feelings and a mood tracking guide to help users interpret patterns. The app is intended for individuals who want to observe their emotional trends over time without requiring extensive journaling or analysis. It is available for download on iPhone, and the official website provides links to the product, learning resources, and legal documentation.