Speak Diary is a journaling application that combines voice recording and freeform writing into a single private space for personal thoughts, reflections, and growth. Its primary function is to help users build a consistent journaling habit by offering multiple input methods, including voice transcription, typing, and sketching. The app is free to download and does not require an account to begin using. It is available at speakdiary.com. The app features a voice-first design that provides real time transcription, allowing users to speak naturally and have their words converted to text instantly. It includes 365 curated daily journal prompts, a daily prompt of the day, and morning writing prompts to guide reflection. Additional capabilities include mood analytics and personalized insights that identify patterns in entries. For privacy, the app uses end to end encryption and a zero knowledge architecture to keep all entries secure. Users can also write future letters to themselves and access recent entries through a simple interface. Typical use cases involve daily journaling for personal reflection, habit tracking, and emotional wellbeing. The workflow starts with opening the app, where a user may choose to record a voice entry, type a freeform entry, or respond to a prompt. Entries are automatically transcribed if spoken, and mood analytics are generated over time to reveal trends. The app is designed to be used consistently, with features such as a daily prompt and a progress indicator for building the habit. Speak Diary is built around the principle that the best journal is one a person will actually use, meeting users where they are whether they prefer typing, speaking, or sketching.