Find out what really lifts your mood.
Log how you feel in about ten seconds. Luci connects it to who you were with and what you did, and shows you the patterns you'd never spot on your own.
Free on iPhone and Android.
The non-obvious patterns
What lifts your mood isn't always what you'd guess.
Luci lines your tags up across weeks and shows you what keeps turning up next to your best and worst days.
Examples. Yours will look nothing like them.
- Example insight: Your Sundays average lower than your Wednesdays.
- Example insight: Parties lift your mood on the day. The day after averages 0.9 lower.
- Example insight: Cooking at home lifts your mood by 0.7 on average.
- Example insight: Calls with your sister turn up on six of your ten best days.
- Example insight: Days you spend outside average 1.2 higher, rain or shine.
Examples. Yours will look nothing like them.
How it works
Ten seconds a day. Luci does the rest.
01You log
A mood, a few emotions, and who you were with, what you did, where you were. About ten seconds.
02Luci connects
The same tags, followed across every entry you have made, week after week.
03You see it
A stats card shows which activity lifts your mood, and by how much.
Log from your Apple Watch, too.
Luci has its own Apple Watch app. Turn the Digital Crown to rate your mood, tick what was going on and dictate a note, without reaching for your phone. Your categories and custom items are already there.
Mood logging on Apple WatchContext, added for you
Weather, places, sleep and steps, logged for you.
Weather is fetched for every entry. Places you save are ticked for you when you're inside them, and each one lands on a map, colored by how you felt there. Turn on health access and Luci adds your sleep and steps too, so you can see whether a short night or a long walk shows up in your mood.
Weather, fetched
Gray days, heatwaves, first snow. Later you can see whether they get to you.
Places, on a map
A pin per place, colored by your average mood there. Geofences tick the place for you.
A real journal
More than a mood. A whole journal.
Photos on an entry
Audio notes
Free-form notes
Write a line or a page, with markdown for headings, bold, italics and lists. Luci keeps it with the day, next to the mood and the tags.
Guided prompts
Over 550 questions across topics like stress, relationships, self-compassion and grief.
Optional encrypted sync
Across iPhone, iPad, Android and Apple Watch. Off until you switch it on.
Make it yours
Your scale, your icons, your colors.
Color theme
Mood icons
Mood scale
Appearance
Light or dark, by hand or with the system.
Home cards and stats cards are yours to add, remove and reorder.
Every category is editable: emotions, activities, people, places, nutrition, body and more.
Earn sparks. Each log earns a few. Spend them on new colorways and icon packs. A small thank-you for showing up, nothing to lose.
Year in Pixels
Your whole year, in one look.
365 squares, one for each day, colored by how you felt. Seasons show up. So do the long, quiet stretches you'd never remember otherwise.
- Rough
- Low
- Okay
- Good
- Great
Stats and trends
See what sits beside your best and worst days.
A month tells you about a month. A few years tell you about you. Which activities, people and places sit alongside your highest and lowest days: this month, this year, or everything you've ever logged.
Mood trendLast 12 months
Places
- Outside+1.2
- Home+0.5
Activities
- Dancing+0.9
- Cooking+0.7
Learn as you go
Understand the patterns you find.
Written by us, free to read.
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Psychology
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When the days get shorter, a lot of people feel flatter, sleepier and less like themselves. What the winter blues are, how they differ from seasonal affective disorder, what helps, and how a mood tracker can show you your own seasonal pattern.
October 7, 2026
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Why people quit mood trackers, and how to stick with one
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September 29, 2026
Private by default
Your journal is not our inventory.
A journal is only worth keeping if you trust where it lives. Luci keeps yours on your phone.
Works fully offline
Every entry is stored on your phone. No signal, no problem.
Sync only if you want it
Off by default. On, it follows you across devices, encrypted in transit and at rest.
Safe when you switch phones
Entries ride along in your phone's own backup.
Never sold. Never shared. Never training data.
Not to advertisers, data brokers or an AI model.
Locked to your face or fingerprint
Switch on biometric lock and Luci opens for nobody else.
Export whenever you want
Everything as a PDF, any time. Nothing is held hostage.
Already using another app?
See how Luci stacks up against Daylio, How We Feel and more, one category at a time. The other app wins some of them, and we say so.
Find out what really lifts your mood.
Free on iPhone and Android.
