DiaryFast
Private AI journal

Journal prompts for every kind of day

Not sure what to write? DiaryFast shows three fresh prompts every day — one to reflect, one for gratitude and joy, one to grow. Here are some of them.

  • Free, no sign-up
  • Entries stored on your device
  • 3 free AI replies a day

Reflection prompts

  • What took up most of your mind today?
  • When did you feel most like yourself today?
  • Which emotion visited most often today, and what did it want?
  • What is quietly bothering you right now?
  • What changed in you this month?

Gratitude and joy prompts

  • Name three small things that went right today.
  • Who made your day a little better, and how?
  • What is something you did well today, however small?
  • What is going better than it was a year ago?
  • Write a thank-you note to someone (you don't have to send it).

CBT and growth prompts

  • What worry is on your mind? What is the evidence for and against it?
  • What would you tell a friend in your situation?
  • What story are you telling yourself about a recent setback?
  • What "should" is weighing on you? Is it really yours?
  • What is the smallest next step on something you've been putting off?

How to use a prompt

Tap a prompt in the app and it's attached to your entry. Answer in one line or a page. Then, if you want, ask The Coach to help you go deeper.

Free and Pro

Writing, prompts, mood tracking, photos, weather and your weekly stats are free forever, with 3 AI replies a day. Pro adds unlimited AI, AI reports, encrypted sync and PDF export. Or try everything for a day with the $4.99 pass.

FeatureFreePro
Journal entries (short posts and long form)Unlimited, on your deviceUnlimited
Daily prompts, mood check-ins, mood calendar & year map✓✓
Photos, weather and place on entries✓✓
Voice to text60 seconds per takeUnlimited
Voice conversation (replies read aloud, hands-free answers)✓✓
AI replies & CBT coaching (Friend, Coach, Mentor, Chronicler)3 per dayUnlimited (fair use)
Your own OpenAI / Anthropic key (BYOK)✓ no daily limit✓
Weekly report: mood curve, keywords, streaks✓✓
AI weekly & monthly reflection reports—✓
Your month as a PDF book (entries, photos, AI replies)Preview✓
End-to-end encrypted sync between devices—✓ (monthly or yearly)
Passphrase lock (AES-GCM) & JSON backup✓✓

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Questions

How often do prompts change?

Every day at midnight, your time. The same day shows the same three prompts on all your devices.

Are the prompts free?

Yes, always.

DiaryFast is a journaling and self-reflection tool. It is not therapy and doesn't diagnose or treat any condition. If you are in crisis, contact local emergency services or a crisis line (US & Canada: 988).

DiaryFast Pro

Unlimited AI personas and CBT coaching, weekly and monthly AI reports, encrypted sync, unlimited voice and PDF export. Your journal always stays yours — free or Pro.

24-hour pass

$4.99 once

Everything in Pro for 24 hours from first use. Perfect for a full-month AI review and a PDF of your month. No subscription.

Pro monthly

$9.99 / month

All Pro features, billed monthly. Cancel any time in Settings → Manage subscription.

Secure payment by Stripe. Your key is shown right after payment and emailed to you. Refunds

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