Calories Burned
Everything the app can do, for one metric.
- Weeks wall and month view
- Four ranges and 21 colors
- Streaks, goal rate and best day
- Home Screen and Lock Screen widgets
- Light and dark mode
iPhone · Works with Apple Health
Every day, one square.
Wall of Truth is a free iPhone app that turns your Apple Health data into GitHub-style activity heatmaps: one square per day, colored by how hard you showed up. A whole year of calories, steps, sleep and workouts on one screen.
Wall of Truth is a free iPhone app that turns your Apple Health data into GitHub-style heatmaps, one square per day.
Try it in your browser Needs an Apple Health export
Demo data in English
- Free to download
- iOS 17 or later
- No account
- No subscription
The wall
No averages to hide behind.
A whole year on one screen. Active stretches, breaks and comebacks show up as patterns, not as a number.
Nothing to log
Your iPhone and Apple Watch already record everything. Wall of Truth reads it straight from Apple Health and keeps your walls up to date, even in the background.
Streaks and history
Tap any day for its value. Open a metric for your streaks, goal rate, daily average and best day.
Light and dark
Every wall and every widget, in both appearances.
Six metrics
Six metrics, one wall.
Calories, steps, exercise, stand hours, floors and sleep, each with its own wall, its own ranges and its own color.
FreeCalories Burned
Calories burned, straight from Apple Health. Free forever, with every feature.
ProSteps
Every walk counts, from the short one on a rough day to the long one on Sunday.
ProExercise Time
Exercise minutes, the way Apple Health records them.
ProStand Hours
The hours you got up and moved.
ProFloors Climbed
Stairs add up. See the days you took them.
ProSleep
Hours of sleep, so rest gets a wall too.
Ranges and colors
Your ranges, your colors.
Not just done or not done. Every metric has four ranges you set yourself: Goal, Strong, Great and Peak. A short walk on a rough day still counts, and the Saturday long run earns the deepest color.
Weeks or months
One long wall, or month by month.
Read your year as one continuous wall, or switch to the month view and spot your patterns month by month.
Widgets
Widgets that keep you honest.
Put a wall on your Home Screen or Lock Screen, or see the last days of every metric in the overview widget. Today’s empty square asks the same quiet question: are you going to fill it?
- Home Screen and Lock Screen
- A wall for every metric
- One overview of them all
Demo data in English
Privacy
Private by design
Your health data stays on your device. No account, no cloud, no analytics on your workouts, nothing to sell. The only person watching your wall is you.
Never leaves your iPhone
Health data is read from Apple Health on your device and stays there.
No account, no cloud
Nothing to sign up for, nothing to sync, nothing to leak.
No analytics on your workouts
Nothing to sell. The only person watching your wall is you.
Free and Pro
Start free with calories.
Calories are free forever, with every feature. When you want the full picture, unlock the other five metrics with a one-time Pro purchase. No subscription, ever.
Five more metrics
Unlock them together, once. No subscription.
- Steps
- Exercise Time
- Stand Hours
- Floors Climbed
- Sleep
Unlock inside the app · one-time purchase
Questions? See the FAQFAQ
A few things to know
What is Wall of Truth?
Wall of Truth is a fitness tracking app for iPhone that visualizes your Apple Health data as GitHub-style activity heatmaps. Each day is a square, colored by how active you were, so a full year of steps, sleep, calories or workouts fits on one screen.
Is Wall of Truth free?
Yes. Wall of Truth is free to download, and calories are free forever with every feature: ranges, colors, month view and widgets. Steps, exercise, stand hours, floors and sleep unlock together with a one-time Pro purchase. There is no subscription.
What does the in-app purchase unlock?
A one-time Pro purchase unlocks steps, sleep, exercise time, standing time and floors climbed together. There is no subscription.
Does Wall of Truth work with Apple Watch?
Yes, through Apple Health. Your Apple Watch records workouts, steps, stand hours and sleep into Apple Health on your iPhone, and Wall of Truth reads them from there automatically. There is no separate Watch app to install.
Do I need to enter data every day?
No. The iPhone app reads the supported Apple Health metrics you allow. It uses existing records, so the wall only shows days with available data.
Where does my health data go?
It stays on your iPhone. The app needs no account and does not upload your health history to a server.
Which iPhone do I need?
Any iPhone running iOS 17 or later. The app reads Apple Health on your iPhone, so there is no Android version.
How does the GitHub-style heatmap work?
Just like a GitHub contribution graph, every day is one cell in a grid. The more you move, the higher the range and the deeper the color. You set the four ranges, so you decide how many steps or minutes of exercise it takes to earn the deepest color.
Does the calorie view track food?
No. It visualizes calories burned recorded in Apple Health. It is not a food diary or a meal-logging tool.
Articles
Before you choose an app
July 24, 2026 · 5 min
Why a GitHub-style heatmap is the best fitness graph you’re not using
Line charts hide your gaps. A contribution-graph heatmap shows every single day of training — here’s why that changes how you exercise.
Read September 11, 2026 · 6 minHow to export your Apple Health data and actually see it
Apple lets you export everything Health knows about you. The file it hands back is unreadable. Here is what is inside it, and how to turn it into a picture of your year in one step.
Read July 24, 2026 · 6 minDon’t break the chain: the science of workout streaks
The “don’t break the chain” method turned Jerry Seinfeld into a punchline machine. Applied to exercise — with honest tracking — it’s the simplest habit system that actually works.
Read
The wall doesn’t lie.
Free on the App Store. Calories free forever, five more metrics with one Pro unlock. Requires iOS 17 or later.