Your emotional
journal.

You write how you are. Lumi keeps the colour of every day and shows you what repeats.

Download on the App Store

Free, no ads. Lumi Pro is optional.

+8,000
downloads
4.9
on the App Store
5
languages

Two minutes a day.That is the whole deal.

  1. 01

    Pick how you are

    Seven states, from angry to excited. One tap and the day is logged.

  2. 02

    Say more if you feel like it

    Write, dictate or add a photo. Or write nothing: the emotion on its own already counts.

  3. 03

    See what repeats

    Your best day of the week, the time you usually write, where your mood is heading.

Simple on the outside.With depth inside.

Seven states, not five smileys

From angry to excited. You pick how you are with one tap and that colour follows you through the whole app.

Daily streak

One day, one entry. The fire does the rest.

32days

This week

  • M
  • T
  • W
  • T
  • F
  • S
  • S

Write however it comes out

Photos from the camera or the library, voice dictation, bold and italic. And a search box to find that entry you know you wrote.

Discover

Patterns, not predictions.

Lumi counts what you have already written and shows you what repeats. No models, no guessing, and your entries never leave the phone.

  • Your best day of the week
  • The time you usually write
  • Where your mood is heading
  • How much you write on average

A year in pixels

One colour per day, the whole year on one screen. The good months and the bad ones show up before you read them.

Twelve questions on rotation

For the days when you know you want to write but not where to start.

What moment made you smile today?

Nineteen medals to unlock

For consistency, for odd hours, for long entries or for getting through a bad run. You claim them by hand and you can share them.

  • Full Week medal: 7 days in a rowFull Week
  • Reflection Month medal: A 30 day streakReflection Month
  • Century Journal medal: 100 entriesCentury Journal
  • Legend medal: 365 days in a rowLegend
  • Early Bird medal: 10 entries before 8:00 AMEarly Bird
  • Night Owl medal: 10 entries after 11:00 PMNight Owl

Six widgets, and one on the lock screen

Logging how you are without opening the app is the difference between doing it and not doing it.

  • Today's moodYour emotion for the day and your streak
  • Quick logOne emotion and straight to writing, in two taps
  • StreakOn the lock screen too
  • Your monthOne colour per day
  • Weekly summaryThe last seven days
  • Daily promptA question to get you started

Apple Health, one way only

Lumi writes your mood into Health and counts each reflection as a mindful minute. It never reads anything from there.

What you writedoes not leave here.

On your iPhone

Your entries are stored on the phone. With Lumi Pro they also sync to your own iCloud, which I have no access to.

Behind a passcode or Face ID

You can lock the journal with a four digit passcode and open it with Face ID or Touch ID.

Works offline

On the underground, on a plane or with no data. The app needs no internet for anything it does.

No ads, no tracking

There is no analytics, no advertising and no third parties. I have no servers to keep what you write on.

The full detail, with no marketing, is in the privacy policy.

What is free and what is not.

The whole journal is free and it will stay that way. Lumi Pro adds the long charts, the memories and the sync, and you can pay monthly, yearly or once.

Free

The whole journal

  • Unlimited entries, with photos, voice and formatted text
  • The seven emotional states and the month calendar
  • Daily streak and all 19 medals
  • Discover: patterns, daily prompts and articles
  • The six widgets and the lock screen
  • Apple Health, reminders and a passcode or Face ID lock

Lumi Pro

For when you want to read the history

  • Your year in pixels: all 365 days at a glance
  • Month by month, and mood by day of the week
  • Memories: bring back your best days by emotion
  • iCloud sync, on all your devices

The price of each plan, and the free trial if there is one, are shown inside the app: the App Store sets them and they change by country.

What the people using it say

4.9 average on the App Store

“This app feels incredibly good to use. The tutorial is delightful. Well done, you have a new fan here 🤙”

Maximilian F.

“It changed the way I think about my day and my time. Highly recommended, it's amazing!!”

Caroline P.

How I made it

Design, code and App Store.On my own, from Barcelona.

Lumi came out on 21 March 2026. Since then it has passed 8,000 downloads, and the launch post went past 1M views. I maintain it myself: the code, the design, the translations into five languages and every update.

  • Swift and SwiftUI

    Native, for iPhone

  • SwiftData and CloudKit

    Local data and sync

  • StoreKit 2

    Subscriptions and one time purchase

  • WidgetKit

    The six widgets

  • HealthKit

    Writing to Apple Health

  • Metal

    The Memories orb

I want an app like this
“I made Lumi because emotions deserve a place of their own. A quiet one, with no noise, where you can stop for two minutes and make sense of yourself.”
Mikel Dewisme

Mikel Dewisme

Creator of Lumi · Barcelona

Start today.

One entry a day is enough. Tomorrow you will have two.

Download on the App Store