Ness

Meet theNess App

The AI health coach app for iPhone and Apple Watch: daily scores, photo-based food logging, and answers grounded in your own data.

Download free

One place for every score

Health, Sleep, Recovery, Strain, Stress, and Energy Level — calculated on your iPhone from the Apple Health data you already generate. No cloud round-trip, no waiting.

Ness app home dashboard showing recovery, sleep, strain, and nutrition scores for today.

Last night, decoded

Deep and REM percentages, interruptions, efficiency, and overnight HR dip — each one scored, explained, and charted against your own 14-night baseline.

Ness app sleep screen showing last night's sleep stages and a recovery trend over time.

A meal log that keeps up with you

Point the camera at your plate, scan a barcode, or just say what you ate. Ness estimates calories, macros, and around 40 micronutrients, then syncs everything back to Apple Health.

Ness app food screen showing a logged meal with estimated calories and macronutrients.

Answers with your numbers attached

Ask the in-app coach why your recovery dipped or what to eat before a hard session. Every answer starts from your data, not a generic template.

Ness app chat answering a health question with advice grounded in the user's sleep data.

Bloodwork, in plain English

Upload lab results and Ness explains each biomarker and how it connects to the sleep, training, and nutrition data it already knows about you.

Ness labs screen explaining bloodwork results and what each biomarker means.

Under the hood

Hydration

Track water intake with quick presets, a Control Center control, or a photo of your bottle.

1.9L

of 2.5L goal

Stress

See your day as an HRV-and-heart-rate timeline, flagged Low, Medium, or High.

Energy

Follow your energy hour by hour and spot the afternoon dip before it hits.

Long-Term Trends

Week-over-week and month-over-month charts for all 18+ metrics, with your baselines baked in.

Micronutrients

Every meal breaks down into fiber, sodium, vitamins, and minerals — not just calories.

Fiber

28g / 38g

Iron

15mg / 18mg

Vitamin D

11µg / 20µg

Apple Watch App

Complications for Sleep, Recovery, Stress, and Strain put today's scores right on your wrist.

Ness app at a glance

Platform
iPhone (iOS 16.4 or later)
Apple Watch
Native companion app, watchOS 10 or later
Data source
Apple Health (HealthKit)
Price
Free to try. $12.99/month or $79.99/year after the trial
Privacy
Scores computed on-device; no sale of health data; Zero Data Retention on AI features

Want the app's features in depth? Browse the full FAQ for device requirements, privacy details, and how each score is calculated.