A private AI journal

Untangle
your thoughts.

Late-night thoughts, messy moods, small daily memories — written down in a private journal you can actually understand, with a gentle AI companion who reads it with you.

4.8 · 25k+ quiet writers
Free on iOS & Android
9:41

Tonight

11:52 PM

Dear diary,

no one’s reading this but me. so here’s the honest version of how today actually felt —

🔒Private · only you
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“i keep replaying everything in my head.”

ZeniZeni

You’re not behind — just tired. Let’s put the thought down and breathe.

the conversation I keep replayinga small win nobody sawwhy I can’t sleepmissing someonethe exam on Mondaythree good thingsthe thing I didn’t saya slow Sundayfeeling behinda good day, finallythe conversation I keep replayinga small win nobody sawwhy I can’t sleepmissing someonethe exam on Mondaythree good thingsthe thing I didn’t saya slow Sundayfeeling behinda good day, finally

Tonight’s loop

Three quiet steps, every night.

The same gentle rhythm each time — the way journaling was always meant to feel.

today felt heavy, and

i don’t fully know why —

01

Pour it out

Open a blank page and write the unfiltered version. No format, no streak shame, no audience.

i don’t fully know why

Zeni

Could it be the call with your mum? You mentioned it twice.

02

Let Zeni reflect

Your companion reads along and gently makes sense of it — naming the feeling, softening the spiral.

Calm, this month▲ 18%
03

See yourself clearly

Moods and patterns surface over weeks. Growth you can actually see, not guess at.

Inside the app

Everything a journal should be, nothing it shouldn’t.

All features

Talk it through with Zeni.

A companion that remembers what you wrote — so its replies fit your story, not a script.

Meet Zeni

i said the wrong thing at dinner and now i can’t stop thinking about it.

Zeni

That sounds heavy. Last week you wrote something similar after the team call — and it turned out fine.

huh. yeah, it did.

Zeni

Want to write down what you actually meant to say? Just for you.

See your journey.

Moods, streaks and a happiness index that means something.

Breathe first.

Box, 4-7-8 and calming routines when the mind is loud.

in…

Write, with help on tap.

Enhance a line, continue a thought, or reframe a spiral.

EnhanceContinueReframeDetect moodSummarize

Locked to you.

PIN, Face ID or fingerprint. No feed, no ads, no audience.

Only you can open it.

Find any memory.

Every entry and mood, one quiet search away.

rain

Fri — the rains came in as the cab…

Mar 3 — walking home in the rain

Your AI companion

It’s 11:48 pm. Zeni’s up too.

Zeni is the little character on our logo — and the gentle voice inside your journal. It reads what you wrote, remembers what matters, and answers like a friend who’s been paying attention.

  • Reflects with context from your past entries
  • Names patterns gently — never preachy
  • Reframes a spiral into something kinder
  • Rename it — Zeni, Luna, Sage, whoever you need
How Zeni works
9:41
Zeni

Zeni

here with you

i keep replaying the conversation from today.

Zeni

That sounds exhausting. What part keeps coming back?

that i said the wrong thing and they’ll think less of me.

Zeni

You’re assuming their thoughts. Want to write what you’d actually want them to know?

Zeni
Tell Zeni anything…

Blank page?

Not sure what to write? Start here.

A few of the gentle prompts waiting inside the app. Pick one — or ignore them all and write whatever’s loudest.

What’s taking up the most room in your head tonight?

prompt #01

Name one small thing that went okay today.

prompt #02

What would you tell a friend who felt the way you do right now?

prompt #03

Write the unsent message. You don’t have to send it.

prompt #04

What are you pretending not to know?

prompt #05

What would rest look like this week — honestly?

prompt #06

Tuesday, 11:48 pm

It was never meant to be a productivity app. It’s a quiet room for your head — somewhere to put the thought down honestly, and come back when the mind is less loud.

— write the unfiltered version.

Read our story
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A private room, by design

Your diary should never feel like a performance.

Zendiary is a quiet, private space — not a social product. The most honest thing you write tonight stays yours.

Read the privacy policy

PIN & biometric lock

Your diary opens only for you — Face ID, fingerprint, or a private PIN.

Yours, not ours

Entries are built to stay private. We don’t read them, and we never sell them.

No feed, no ads

No streak shame, no algorithm, no ad dropped into the middle of a hard entry.

Questions

Good to know.

Still curious? The help centre has the rest.

Visit the help centre

Zendiary is a free AI-powered journaling app that helps you understand your mind through mood tracking, pattern recognition, and gentle insights — designed for mental clarity and mindful reflection.

Yes. Your diary can be locked with a PIN, Face ID or fingerprint, and we never sell your entries to advertisers. AI features only process what they need to respond — see the AI privacy page for details.

Zeni is Zendiary’s AI companion. It reads your entries with context, helps name patterns, suggests kinder reframes for spiralling thoughts, and helps you see emotional trends over time.

Yes — journaling, mood tracking and core AI features are free. Zendiary+ adds advanced analytics and more Zeni conversations for those who want them.

Yes. Zendiary is free on both the App Store and Google Play.

Day One is a beautiful archive; Reflectly is guided prompts. Zendiary is a private journal with a companion that actually reads along — helping you notice patterns, reframe thoughts, and see how you change over time.

Begin tonight

Give the thought somewhere softer to land.

Start with a single line. Free, private, and waiting whenever you are.

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