How to keep a mood diary on your phone

A mood diary is a short daily note about how you feel and what was going on. Over a few weeks it shows things memory hides: that bad days follow short nights, or that one kind of meeting drains you. It takes a minute a day if you keep it simple.

A simple approach, then mood diary apps, with a section for mood apps rising by visits on the Censuus ranking. A mood diary is a self-observation tool, not treatment and not a diagnosis. If low mood lasts for weeks, or you have thoughts of harming yourself, contact a doctor or your local emergency number now.

Mood apps rising by visits and sponsorship on Censuus

Younger apps from independent developers:

Ranked by visit traffic and sponsorship on Censuus, not editorial opinion. The list changes as new apps appear and gain traffic.

Keep the entry tiny

Use the same moment each day and a scale you do not need to think about, such as one to five, plus one word: tired, calm, tense. If you want more, add a sentence about what happened. A diary you keep for weeks beats a detailed one you drop after three days. For longer reflection, see how to start journaling.

Context turns notes into patterns

Mark sleep, exercise, alcohol, conflicts, work stress, and for some people the menstrual cycle. Once a week, look across the days: which things come before bad days and before good ones. Apps that build charts make this easier, but a notes app works too.

When a diary is part of treatment

Some therapies use structured diary cards, and some conditions, such as bipolar disorder, need tracking of both low and elevated moods; see how to keep a mood chart for bipolar disorder. In those cases agree the format with your doctor or therapist. More support tools are in mental health apps.

Compared from each developer’s own store description.
Step	What you do	Why
1. Pick a fixed moment	evening or after lunch, every day	a habit that survives busy days
2. Rate mood simply	a short scale plus one word	fast enough to keep doing
3. Add context	sleep, events, people, cycle, medication	you will look for causes later
4. Review weekly	look for patterns, not single days	one day says little
5. Share if needed	bring the record to a doctor or therapist	facts beat memory at an appointment

Frequently asked questions

How do I keep a mood diary?

Once a day at a fixed time, rate your mood on a simple scale with one word, add sleep and main events, and look at the week as a whole once a week.

What should I write in a mood diary?

Mood, a word for the feeling, sleep, main events and people, and anything you suspect affects you, such as exercise, alcohol or the cycle.

Can a mood diary replace a therapist?

No. It is a self-observation tool. It can make an appointment more useful, but it does not treat anything. If you feel unsafe, contact emergency services.