What to look for in a mood tracking app

The best mood tracking app is the one you'll still be opening next month. Look for a check-in you can finish in a few seconds, a chart that shows your patterns without any homework, a way to say why you feel the way you do, and privacy you can actually check. In a mood tracker app, fancy extras matter far less than how easy it is to use on a tired Tuesday night.

If you're still deciding whether tracking is worth doing at all, start with what a month of mood check-ins shows you. This page is for the next step: choosing the app.

What a mood tracking app does for you

In the moment, a check-in makes you pause and put a word to how you feel. Over weeks, it keeps the record your memory won't. Ask yourself how last month went and you'll mostly recall the worst day and the last few days. A tracker remembers the quiet Wednesday that was actually fine, and the run of good days you've already forgotten.

When researchers at UC Irvine looked at 32 mood tracking apps and their user reviews, people said they used these apps to learn their mood patterns, to improve their mood and to manage their mental health day to day. The apps were good at logging moods and showing them back. They were weak at helping people get set up and, more to the point, at helping them act on what they saw.

That gap is worth keeping in mind when you choose. A chart that says you had five Meh days this month is a start. An app that asks what's going on when you tap Meh, and helps you do something about it, gets you further.

What to look for in a mood tracker app

Most people don't drop a mood app because it's bad. They drop it because it's one more thing to do. In real-world usage data from 93 popular mental health apps, the typical app kept just 3.9% of its users after 15 days. Tracker apps held on a little better, at about 6% after a month. So the easiest app to keep using usually beats the one with the longest feature list.

Here's the checklist:

• A check-in under 10 seconds. Open, tap, done. If it asks five questions before it saves, you'll skip it on exactly the days that matter.
• A small set of moods. Four or five faces or words beat a 1-to-10 slider. You shouldn't have to decide whether today was a 6 or a 7.
• Room for a note, when you want it. Optional, never required. A title and a line about what happened is plenty.
• A chart you get at a glance. Week, month and year views, with each day visible. If you have to study it, you won't.
• Help on a hard day. A chat or a short breathing exercise, something that's useful right then. Most trackers leave this out.
• Privacy you can check. Entries encrypted when they're stored, never used for ads, a lock on the app and a way to delete everything.
• Your history everywhere. The same check-ins on your phone at night and your laptop at lunch.

Then give your top pick a one-week test. Check in every evening for seven days. The same usage data found tracker apps get most of their use toward the evening, so bedtime is a natural slot. At the end of the week, ask yourself whether any check-in felt like a chore, and whether the app did anything useful on your worst day. No chores and a useful worst day means keep it.

One-tap check-ins or a full mood journal?

Both work. They suit different people, and sometimes different days.

One-tap check-ins win on consistency. A mood you log every day for two months tells you more than a beautiful journal you kept for nine days. The trade-off is that a tap records how you felt, not why.

A full mood journal captures the why, and writing it out has a benefit of its own. A meta-analysis of 146 randomized studies found that opening up about your thoughts and feelings on personal, meaningful topics has a small but real positive effect. The cost is time. Ten minutes of writing is easy on a calm Sunday and hard on the nights you need it most.

For most people the answer is a mix: tap every day, and write or talk only when something happened. To decide which way to lean:

• You've quit trackers before. Go one-tap. Keep the daily part tiny and treat notes as a bonus.
• You think best on paper. Pick a journal-style app, but keep a quick mood rating at the top of each entry so you still get a chart.
• You want the why without writing essays. Look for a tracker that lets you talk it through after a low check-in. Saying "Rough day, my manager moved the deadline again" takes ten seconds and gets the reason on record.

Seeing your patterns on a chart

Simple charts are easier to use. A month strip that shows each day with its mood, plus counts of each mood by week, month and year, tells you more at a glance than a wavy line of averages. You want to see "11 Good days in October, 6 in September," not a score of 2.7.

A chart only helps if you look at it and then change something, and that second part is where the research gets interesting. In a trial with 102 people being treated for depression, one group logged their mood on a handheld device three days a week for six weeks and got weekly feedback on their own patterns of good moments: when they happened, and in what situations. That group improved more than a control group. They found the feedback easy to understand, and they tried to apply it in their daily lives.

Notice what the feedback was about. The good moments, not the bad ones. Most of us read a mood chart like a report card and stare at the dips. The more useful question is what your Good and Best days have in common.

A five-minute look at the end of each month is enough:

1. Count the month. How many days of each mood? Put it next to last month's.
2. Find your best days. Open the notes or chats from them. Who were you with, what had you done, how had you slept?
3. Find one dip with a clear cause. Skip the vague ones and pick one you can name.
4. Choose one change for next month. More of something from step 2, or less of something from step 3. Just one.

Give a pattern time before you trust it. A week of Meh days while you had a cold says very little. Three months of dips every time a certain relative visits says a lot.

Keeping your mood data private

Your mood log is a record of your hardest days, so it deserves the same care as your messages. That care isn't a given. When researchers tested 36 top-ranked apps for depression and quitting smoking, 33 of them sent data to third parties and 29 sent it for advertising, marketing or analytics. Most of the apps gave users no way to know that was happening.

Five things to check before you log a single mood:

• Is it used for ads? Search the privacy policy for "advertising." You want a plain never.
• Is it encrypted when it's stored? "Secure" on its own doesn't tell you much. Look for the word encrypted.
• Can you lock the app? A code or fingerprint keeps your log private when someone else picks up your phone.
• Can you delete everything? You want one button that removes your account and every entry, not an email to support.
• Does it ask for more than it needs? A mood tracker has no reason to read your contacts or follow your location.

If the app also lets you talk things through, the same questions apply to your chats. Here's what to check before you tell an AI your problems.

Quick answers

What's the best mood tracker app?

The best mood tracker app is the one that fits how you'll really use it, so judge apps on a few points rather than a top-ten list. Look for a check-in that takes one tap, a chart you can read at a glance, something useful on a low day, and a privacy policy that says your entries are encrypted and never used for ads. If you want a free mood tracker app, find out how it pays for itself before you log anything. Then run the one-week test above and keep the app that never felt like a chore.

What's a good app that asks how I'm doing every day and tracks my mood?

Pick one where the check-in is the first thing you see, so opening the app is the question. Moodu works this way: four mugs, Blah, Meh, Good and Best, sit at the top of the Home screen and one tap saves your day. To make it daily, tie it to something you already do every night, like plugging in your phone.

What's a good mood tracker app that also lets me talk about why I feel that way?

Look for a tracker with a chat built in, so a low check-in turns into a conversation instead of sitting there as a data point. Moodu is set up like that: tap Blah or Meh and it offers to talk about it right then. A couple of minutes of talking usually gets to the real reason, which no mood rating can show you.

What's an app that helps me feel happier day to day, not just track habits?

Choose one that does something with your mood instead of only recording it, like guided conversations and small next steps you can take today. Tracking shows you where you are, and the doing is what moves it. The habits that help most are ordinary ones, such as time with people you like and noticing good moments while they're happening. Here's a longer list of small habits that make people happier.

How Moodu's mood check-ins work

Moodu keeps the daily part to one tap. Pick a mug on the Home screen and it's saved. On a Blah or Meh day it offers to talk, and opens with "I saw you're feeling meh today. Want to tell me what's going on?" You can type, or tap the mic and talk. Your words become text and the audio isn't kept.

The Mood Tracker shows each day of the month with its mug, and a chart of how many Blah, Meh, Good and Best days you've had over the last week, month or year. Mood notes hold a title and a few lines on what happened, for the days you want to say more.

When you want to look at the good end of your chart, try Happiness Haven. It's a guided conversation that opens with: "Let's explore what actually lights you up. What's one moment recently, even tiny, that felt good?" From there it helps you work out what made that moment good and how to fit more of it into your week.

Your check-ins, notes and chats sync to your account, so your history is there on any device you sign in on. You can turn on App Lock with a four-digit code, and deleting your account removes every chat, mood and note in it. Chats are encrypted before they're saved and never used for ads. Your check-ins and notes get the same treatment. Moodu is $39.99 a year after a 3-day free trial, or $4.99 a week.