Meals photographed and estimated by AI, nutrients, water, glucose, measurements, medications, guided workouts and longevity. No account, no server holding your data.
Iðunn brings together everything that matters for your health: what you eat, how much you move, how you sleep, your medications, measurements and lab results. It turns them into clear numbers and small daily steps, to feel good today and for longer.
Who was Iðunn
In Norse mythology, Iðunn is the goddess who keeps the golden apples of youth. The gods eat them so as not to grow old: thanks to her they stay strong and young.
Hence the app's name and its symbol, the golden apple: longevity isn't magic, it's everyday care.
One app instead of five
Usually you need a calorie counter, a training app, a medication app and a spreadsheet for measurements. Iðunn brings them together, and the numbers finally talk to each other.
Meals
Snap your plate, AI does the rest
Take a photo or describe what you ate: Iðunn estimates portions, calories, macros and micronutrients. For packaged food, just scan the barcode. Review and adjust before saving.
Photo, text, barcode or manual entry
Photos are never stored
Every meal goes to Apple Health
Nutrients
Not just calories: vitamins and minerals
Fibre, sodium, iron, magnesium, vitamin D and the rest of the day's nutrients, compared with the references for your age and sex. Choose LARN (Italy), EFSA (Europe) or DRI (USA).
15 micronutrients on top of macros
Three reference sets to choose from
Supplements count towards totals
Today
An honest calorie balance
Calories eaten versus calories actually burned: basal metabolism plus Apple Health active energy, without counting workouts twice. Your budget grows through the day as you move.
Steps, calories and HR from any watch linked to Apple Health
Correct a value by hand when needed
Home Screen and Lock Screen widgets
Goal
Lose weight at a safe pace
Set a target weight and date, or pick a pace: Iðunn works out the deficit, warns you if it's too aggressive and never lets you go below your basal metabolism.
Weight trajectory and projection
Waist and body fat as goals
Lose, maintain or gain
Training
A coach in your pocket
A weekly plan, optionally generated by AI from your goals. In the gym follow sets, reps and rests with the timer; running or cycling, the intervals. Your workout stays on the Lock Screen.
Automatic rests and intervals
Workouts saved to Apple Health
Perceived effort (RPE) and history
Trends
Progress without the noise
Weight, BMI, resting heart rate, steps, glucose and energy balance over time. Clear charts that show the direction, not one day's wobble.
Week, month and since your goal began
Body indices (US Navy, waist-to-height)
Lab results with their values
Meds and measurements
Medications and supplements, never forgotten
Reminders at the right times and "Mark as taken" right from the notification. Glucose, blood pressure and body measurements in a few taps. Reminders stay quiet if you've already logged the data.
Local notifications, no server
Flexible days and times
A "To do today" list that ticks itself
Longevity
Eleven pillars for a long, good life
Cardio fitness, strength, sleep, nutrition, stress and the other pillars of longevity in one dashboard. With posture analysis from three photos and the PSS-4 stress questionnaire.
Posture analysis with suggested exercises
Strength and mobility tests
Stress and recovery without made-up numbers
Why Iðunn
Private by design
No account and no server storing your health data. It stays on your device and in Apple Health; export or delete it whenever you like.
Speaks Apple Health
Reads steps, calories, HR and workouts from any watch that writes to Health, and writes meals, water, glucose and measurements back. No duplicates.
Transparent maths
Mifflin–St Jeor, US Navy, LARN: every number tells you where it comes from. The deficit is cautious on purpose and the safety floor can't be crossed.
Everything connected
Supplements feed your nutrients, workouts your calorie balance, weight your trajectory. Log something once and it counts everywhere.
Made in Italy
Built in Italian with Italian nutrition references, metric units and familiar foods. Fully available in English too.
Wellness, not alarms
No diagnoses and no dosing advice: Iðunn helps you notice patterns and talk them through with your doctor.
How it compares
An indicative comparison with the most common features of apps in each category.
Iðunn
Typical calorie counters
Typical fitness apps
Works without creating an account
✓Yes
–Usually not
–Usually not
Health data only on your device
✓Yes
–Usually not
–Usually not
Meals from a photo with AI estimate
✓Yes
◐Partly or paid
–Usually not
Micronutrients against official references
✓Yes
◐Partly or paid
–Usually not
Calorie balance with no double counting from your watch
✓Yes
◐Partly or paid
–Usually not
Guided workouts with timer and rests
✓Yes
–Usually not
✓Yes
Medication and supplement reminders
✓Yes
–Usually not
–Usually not
Longevity, stress and posture
✓Yes
–Usually not
◐Partly or paid
✓ Yes · ◐ Partly or paid · – Usually not
Your data stays yours
No account
Open the app and start. No email, phone number or password.
On your device
iOS-encrypted storage and Apple Health. No iCloud, no servers of ours.
AI only if you want
Photos are sent only with your consent, downsized and nameless, then discarded.
Export and delete
JSON or CSV in one tap. And one button that truly deletes everything.
