Journaling guides
Step-by-step guides for writing a useful journal — and for knowing exactly what happens to it. Each one is dated and kept up to date.
CBT journalingHow to write a CBT journal: 5 prompt templatesA practical guide to CBT journaling: what a thought record is, five fill-in templates (thought record, thinking traps, worry reality check, behavioural experiment,…6 min read · Updated 8 November 2026Privacy, in detailWhere your journal is stored — and who can see itA technical, plain-English explanation of where DiaryFast keeps your entries (IndexedDB on your device), what leaves the device for AI replies, weather, sync and…5 min read · Updated 8 November 2026ChallengeThe 30-day morning journal challengeA free 30-day morning journaling challenge: one prompt a day in four themed weeks (notice, intend, untangle, direction), five minutes each, with weekly reviews and a…4 min read · Updated 8 November 2026How-toHow to back up, export and sync your journalStep by step: export a JSON backup, restore it on another browser, save a month as PDF, set up end-to-end encrypted sync between phone and computer, and what happens…3 min read · Updated 8 November 2026AI companionsAI journaling: how to get helpful repliesHow to get useful replies from an AI journal: choosing between The Friend, The Coach, The Mentor and The Chronicler, writing entries the AI can help with, using your own…3 min read · Updated 8 November 2026
Feature guides
Shorter pages about what each part of DiaryFast does.
AI journal: write, and get a reply that actually helpsA free AI journal: write a line or a page and get a reply from The Friend, The Coach (CBT), The Mentor or The…CBT journalA CBT journal with an AI coach: catch the thought, spot the thinking trap, weigh the evidence, find a…A private journal, by designA private journal app that stores entries on your own device, with an optional AES-256 passphrase lock,…Mood tracker with a journal attachedTrack your mood with one tap per entry and see it on a color mood calendar, a year map and weekly mood…Micro-journalingMicro-journaling means one or two sentences a day. DiaryFast makes it a private feed you post to in seconds,…Journal prompts for every kind of dayFree journal prompts for reflection, gratitude and personal growth, including CBT-style prompts. DiaryFast…Weekly reflectionA weekly reflection that writes itself: mood curve, streak, recurring themes and an AI review of your week…
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