Nutrition tracking that stays calm
A food diary, calorie tracker and fasting timer for iPhone and Apple Watch — a deep health app that never feels heavy.
A food diary, calorie tracker and fasting timer for iPhone and Apple Watch — a genuinely deep health app that never feels heavy. Design, product and engineering, end to end.
- What we delivered
- Product strategyUX & UI designAI food-loggingNative engineering (iOS · Watch)Launch
- Year
- 2026
- Role
- End to end
- Scope
- Design · Build · Launch
- Platforms
- iOS · Watch
The challenge
Calorie trackers ask for too much and give back a spreadsheet. Zen Lean had to make logging effortless — photo, barcode, search or a sentence — and pull food, fasting, water, sleep and recovery into one view without turning into a cockpit.
Log it any way you like
Calorie trackers ask for too much. Zen Lean lets you log food however suits the moment — snap a meal photo for an AI estimate of calories and macros, scan a barcode, search, or just describe what you ate in a sentence.
One calm surface
Daily totals, macros, the fasting timer and water goals sit together on a single legible surface — deep enough to rely on, quiet enough to open every day without it feeling like a cockpit.
The whole picture, on your wrist
Apple Health brings sleep, recovery and activity in alongside nutrition, each reading showing where its data came from. An Apple Watch app and widgets keep the day one glance away.
How we did it
- 01
Let people log food their way: snap a meal photo for an AI estimate of calories and macros, scan a barcode, search, or just describe what they ate.
- 02
Designed a single calm surface where daily totals, macros, the fasting timer and water goals sit together, legible at a glance.
- 03
Connected Apple Health so sleep, recovery and activity read alongside nutrition, with each reading showing where its data came from.
- 04
Carried the whole thing onto the wrist, with an Apple Watch app and widgets that keep the day one glance away.
The outcome
A health app that's genuinely deep — AI food logging, fasting, hydration, recovery — yet stays quiet enough to use every day. Live on the App Store for iPhone and Apple Watch.