Free
CHF 0Your diary, adaptive engine, barcodes, search, weight and sharing remain free.
ADAPTIVE CALORIE TRACKING · DESIGNED IN SWITZERLAND
A stable budget,
guided by your weight trend.
The engine learns your observed metabolism each week after five logged days.
A goal date appears only with a reliable weight trend.
Our story
The app I wanted
Every useful feature cost extra, and each one lived in a different app. ark.fit brings them together: meal estimates that rely above all on your description, an honest range instead of a fake exact number, and a barcode scanner linked to product databases.
THE ADAPTIVE ENGINE
Your metabolism reveals itself over time.
A formula provides the starting point. Each week, ark.fit compares your log with your weight trend and keeps your base budget stable.
YOUR STABLE BUDGET, WITHOUT FALSE PRECISION
Nobody knows your metabolism to the exact kcal. The range tightens with your data, while your base budget stays stable.
1,888 median 2,052 kcal 2,217
Metabolism ≈ intake − (weight change × 7'700 kcal/kg ÷ 7) · 10–14-day trend · goal date with a reliable weight trend · stable base
01
Log as usual
Search, scan or describe. Five logged days are enough for the next assessment.
02
Weigh yourself regularly
The 10–14-day trend softens fluctuations from water, salt and glycogen.
03
See the uncertainty
The budget stays stable. The range tightens with your data, while the goal date waits for a reliable trend.
SAFEGUARD · SAFETY FIRST
If your real loss exceeds ~1.35% per week, ark.fit forces the budget up — whatever your log says. Absolute calorie floor, never "unlogged day = 0 kcal".
UNDER-REPORTING DETECTED
Fewer than 5 logged days in the week? The engine does not use that week to re-estimate metabolism. The base budget stays stable and the safeguards remain active.
0 food databases
FSVO and CIQUAL available offline
0 days
of calibration before your first personalised assessment
0%
of tracking data encrypted on your device
INSIDE THE APP
Three screens.
All the tracking.
On video
Every module on video
Short demos with fictional data, to see each module in action.
A budget that starts from an estimate and learns from your real data: a smoothed weight trend, a weekly review and exceptional activity never counted twice.
THE EVERYDAY
Everything you need to log fast. Nothing to distract you.
⌕ gruy offline
01
Offline search
2'608 FSVO and CIQUAL foods remain available without a connection.
02
Smart scanner
Barcode recognised instantly, on-device and free. If the product's missing, a multi-angle label photo takes over.
P
G
L
03
Nutrition rings
Macros, fibre, salt, saturates and free sugars. Partial data shows ≥ or a range, never a false zero.
04
Weight trend
A curve smoothed over two weeks: you see the trajectory, not the noise of the morning scale.
GentleModerateBrisk
05
Retroactive log
Add to the right meal on a past day. A recent deletion remains undoable.
♥ HealthKit optional
06
HealthKit optional
Sync weight and activity if you want. The app works 100% without it.
OFFICIAL FOOD DATABASE
Sourced data without false zeroes.
FSVO and CIQUAL provide 2'608 foods offline. ark.fit shows sources, coverage and badges only when the data exists.
FSVO databaseMicronutrientsOfficial Nutri-ScoreNOVACH/EU barcodes
⌕ gruyère FSVO DATABASE
Gruyère AOP, mild
Gruyère AOP, mature
Fondue moitié-moitié, prepared
Vaud-style cheese croûte
NUTRI-SCORE SHOWN ONLY WHEN THE DATA EXISTS SOURCE: FSVO / BLV
BEYOND COUNTING
An app that grows with your kitchen.
SCROLL TO EXPLORE →
📷
≈ 460–540 kcal · editable Describe
Describe your meal, add up to three photos, or combine both. AI suggests an editable range, never a number presented as exact. Infomaniak processes in Switzerland by default; a selected model may process outside Switzerland with your consent.
01 / 05
Plain yogurtD−5
Fresh spinachD−2
Chicken fillettoday
Anti-waste inventory
Your kitchen in your pocket: expiry dates, freshness alerts, and the list of what to cook first.
02 / 05
Quick < 30 minVeggieAnti-wasteGluten-free
Suggest 3 ideas
Recipes
Recipes computed to the gram from the FSVO database — and prioritised by what's about to expire at your place. Import any recipe from its link.
03 / 05
Peeled tomatoes 400g2.95
UHT milk 1L1.65
Gruyère 300g7.90
→ 3 items added to the pantry
Receipt OCR
Scan your receipt. ark.fit prepares the items; you confirm them before adding them to the pantry.
04 / 05
M S
Proposed meal · 4 servings
2 BUDGETS · 1 SHARED KITCHEN
Household
Everyone keeps their own budget. The household shares its pantry, recipes and proposed meals with end-to-end encryption.
05 / 05
RADICAL PRIVACY
Your data stays in your pocket.
Your personal log stays encrypted on the iPhone. Household data is end-to-end encrypted during sync. No advertising or data resale.
0 ad trackersOptional accountJSON exportAES-GCM · Keychain
01
Local-first, really
Encrypted SwiftData on the device is the only source of truth. No backend holds your log.
02
AES-GCM field encryption
Weight, meals and aversions are encrypted individually (CryptoKit), key in the iOS Keychain.
03
Total, irreversible erasure
Full JSON export and crypto-shredding: the key is destroyed, your data becomes unreadable — even to us.
04
HealthKit optional
The app works entirely without HealthKit. If you enable it, the raw data never leaves the device.
nFADP COMPLIANT · A WELLNESS APP, NOT A MEDICAL DEVICE
Free tracking. AI with Premium.
AI Premium
CHF 2.90/monthor CHF 29/year, paid in one payment
Meal photo and description analysis, AI extraction, recipes and advice with a monthly allowance.
14 days free from your first Premium use, no card required.
Automatically renews. Cancel for the end of the paid period.
Limited AI allowance, renewed monthly. No new credit packs.
Previously purchased credits remain usable without a subscription and never expire. No automatic extra debit.
Download for freeFRANÇAIS · DEUTSCH · ITALIANO · ENGLISH
Commence par te peser.
Beginne mit dem Wiegen.
Comincia pesandoti.
Start by weighing yourself.
After calibration, the app tracks your metabolism. When the weight trend is reliable, it adjusts the goal date; otherwise the date remains unavailable and the base budget stays stable.
