See every hour of your day
Body & Mind Battery plus a Life Canvas turn your whole day into a picture you can actually see.

Start with one small habit
Sleep, walk, exercise, focus — each habit comes with free tools to see where you stand, then let your watch keep track.
From mind to body — pick one to start
Every tool is built on published scales and research, giving you an instant, personalized read — not just a random score, and no download or sign-up.

Body Fat Calculator
Calculate body fat percentage through multiple methods to understand body composition
Fat-Free Mass Index Calculator
Calculate fat-free mass and FFMI from your body fat — with separate benchmarks for men and women, plus the natural muscle limit. A "muscle BMI".
Stroop Test
A 30-second color-word test that mirrors your focus and mental interference right now.
Wellbeing Test
Free WHO-5 wellbeing self-check — 5 questions, get your 0–100 wellbeing score.
Four kinds of health app — which one do you actually need?
Want to log moods by hand, see workout numbers, or have something quietly watch your state? This table shows where Moodji fits.
| Journal / mood apps | Fitness bands | Apple Health | Moodji | |
|---|---|---|---|---|
| How it records | Manual check-ins | Passively tracks steps / heart rate | Passively collects health data | Automatic · no check-ins |
| What it shows | Mood scores | A single metric (HR / steps) | Raw data and charts | Real-time Body & Mind Battery, plus an hourly state — 144 slots a day |
| Screen use | Not included | Not included | Screen Time tracked separately | Feeds both the battery and the hourly state |
| When you get feedback | Look back later | Look back later | Look back later | Updates every 10 minutes |
| What it tells you | Just records, no advice | Just data | Just data | An hourly read on your state, and a nudge when the battery dips |
- Journal / mood appsManual check-ins
- Fitness bandsPassively tracks steps / heart rate
- Apple HealthPassively collects health data
- MoodjiAutomatic · no check-ins
- Journal / mood appsMood scores
- Fitness bandsA single metric (HR / steps)
- Apple HealthRaw data and charts
- MoodjiReal-time Body & Mind Battery, plus an hourly state — 144 slots a day
- Journal / mood appsNot included
- Fitness bandsNot included
- Apple HealthScreen Time tracked separately
- MoodjiFeeds both the battery and the hourly state
- Journal / mood appsLook back later
- Fitness bandsLook back later
- Apple HealthLook back later
- MoodjiUpdates every 10 minutes
- Journal / mood appsJust records, no advice
- Fitness bandsJust data
- Apple HealthJust data
- MoodjiAn hourly read on your state, and a nudge when the battery dips
Comparisons describe what is typical for each category, not any specific product. Moodji’s Life Canvas, real-time Body & Mind Battery and other advanced features require membership.
See how Moodji does it →About moodji.net
What is moodji.net?
A health-focused site: use free self-tests and calculators to understand how your body and mind feel right now, build better habits, and get to know the Moodji app that can keep you company long-term.
Are these health tools free?
All free, with instant results and no download or sign-up. Every tool is built on published scales and research (like PSS-10 and GAD-7).
Do I need to download an app to use the tools?
No, they run right in your browser. If you want your Apple Watch to track your state automatically every day, you can explore the Moodji app.
How are moodji.net and the Moodji app related?
moodji.net is the website — for taking tests, understanding yourself and choosing the right health app; the Moodji app works with your Apple Watch and iPhone to automatically paint your day into a Life Canvas.
Are these self-test results accurate and trustworthy?
The tools are based on published assessment scales and research, giving a reference-level evaluation with a personalized read — not a medical diagnosis. For health concerns, consult a professional.

