About DiaryFast
Most people want to journal and most people stop within a week. The reasons are always the same: it takes too long, the blank page is intimidating, and nothing comes back. DiaryFast fixes all three.
- Fast — a feed you can post one sentence to, in seconds, plus a full editor when you have more to say. Voice-to-text, photos, weather and place in one tap.
- Guided — three fresh prompts every day, and an AI Coach that uses cognitive behavioral therapy (CBT) questions to help you untangle a thought and turn it into a next step.
- It writes back — choose The Friend, The Coach, The Mentor or The Chronicler and get a reply under every entry, then a weekly reflection that shows you the shape of your week.
Private by design
Your journal is stored in your browser (IndexedDB), not on our servers. You can lock it with a passphrase (AES-256-GCM, key derived with PBKDF2), sync it end-to-end encrypted, and use your own AI key so that nothing passes through us at all. Read the privacy policy for exactly what happens when you ask the AI for a reply.
What DiaryFast is not
DiaryFast is a self-reflection tool. The AI personas are not therapists, can be wrong, and are not a substitute for professional care. If you are struggling, please talk to someone you trust or a professional; in a crisis call local emergency services or a crisis line (US & Canada: 988).