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parallaxintelligence.digital
iPhone app · ○ in development

A health coach that never phones home.

HealthCoach reads your Apple Health data, learns your baseline from your own history, and coaches you against it - honestly. The intelligence runs on the phone. No account, no cloud, no server anywhere. Your health data never leaves the device.

running daily on our own iPhone and Apple Watch · TestFlight next

01

Your numbers, not generic targets

Onboarding computes your baseline from your own last 30 days of Apple Health history - steps, resting heart rate, HRV, sleep - then sets goals scaled from where you actually are. The coach cites your real numbers, acknowledges regressions instead of cheerleading through them, and gives one concrete action at a time.

On-device AIThe coach is Apple Intelligence running locally. It reads live HealthKit data and your daily log through tools, and it works in airplane mode.
The whole dayLive dashboard, trends with baselines and target bands, morning and evening check-ins, hydration and habit logging that writes back to Apple Health.
Everywhere you lookApple Watch app and complications, Home and Lock Screen widgets, Control Center, Siri, Live Activity rings on the Dynamic Island.
02

Why none of it leaves the phone

A health coach needs your resting heart rate, your sleep, your weight, and your habits. That is the most sensitive data most people generate, and the usual arrangement is that you hand it to a company in exchange for encouragement. We did not want to be that company, so we built the product in a way that makes it impossible: there is no account to create and no server to send anything to.

No account, no serverNothing to sign up for and nowhere for your data to go. We cannot see your numbers, sell them, or lose them in a breach, because we never receive them.
Works in airplane modeThe coach is Apple Intelligence running locally, so it answers with no connection at all. That is the proof the data is not going anywhere.
Your history stays yoursBaselines are computed from HealthKit on the device. If you delete the app, the analysis goes with it. There is no copy of you left behind.
03

Where it fits with HealthSync Companion

The two apps solve opposite halves of the same problem. HealthSync Companion gets your data into Apple Health when it is stranded in Fitbit. HealthCoach does something useful with what is already in Apple Health. You do not need both, and neither one requires the other.

Wear a FitbitRun HealthSync Companion so the sleep stages, heart rate, and blood oxygen land in Apple Health. HealthCoach then coaches against that history like any other source.
Wear an Apple WatchYour data is already in HealthKit. HealthCoach reads it directly, and the Watch app, complications, and widgets put the day's state where you are looking.
Wear nothingManual logging still works. Hydration and habits write back to Apple Health, and the coach uses whatever baseline it can honestly compute from what you have.

HealthCoach is built by Parallax Intelligence, our software and automation practice in Battle Creek, Michigan. The apps are what we build for ourselves. The practice is the day job that pays for them.

status · in development · running daily on our own devices · TestFlight next

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