hyppo

a small creature that tells you the truth about your day

An iOS app where a virtual pet mirrors your actual mental state — thriving, coasting, or wilting — driven underneath by a real exercise-science engine reading your movement, sleep, and consistency from HealthKit. Movement is medicine; hyppo is what makes that visible, without the guilt trip most habit apps run on.

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In one line: hyppo is a brain-health companion pet — real HealthKit data driving a character that's honest about how you're doing, with an AI coach that talks like it means it.

The daily loop

№ 1

Real data in

HealthKit, years back

Movement, timing, consistency, sleep — read from your actual history, not a form you fill out once and forget.

№ 2

One honest score

no per-tab drift

Everything blends into a single brain-health number — the same number everywhere in the app, verified against what HealthKit actually recorded.

№ 3

A creature that tells the truth

four states

Thriving, content, sluggish, or wilting — the pet's face is a plain readout of where you actually are today, not where you wish you were.

№ 4

A coach, not a lecture

AI Brain Coach

A streaming coach that talks in plain language about your actual day, and nudges the next one — no exclamation points, no streak panic.

The name is the thesis — hippocampus, hippo, brain health. Double-P, kept on purpose.

Underneath the pet

A companion, not a diagnosis.

If you're navigating ADHD, anxiety, or depression, the day's prescription can adjust to what you're carrying — same movement principle, tuned rather than generic. hyppo is a wellness companion, not a clinical tool, and it says so.

History, not just today.

hyppo reads years of HealthKit history on setup, so it understands your actual rhythm from day one instead of starting cold and guessing.

Shared science, not a gimmick.

The same brain-health scoring underneath hyppo also powers SCVLPT, Stellarii's strength-coaching app — one piece of real research, two honest expressions of it.

Built lo-fi on purpose.

A retro, quiet skin instead of a bright dopamine loop — the calm is deliberate, not a placeholder for polish that's coming later.

What it won't do

It will never let anything substitute for movement. A little breathing or a mood check-in helps at the margins — it cannot buy its way to the top state.
It will never fake your progress. One score, checked against your real data — no “done!” on a half-finished day.
It will never punish you into compliance. No shame streaks, no guilt copy, no locked phone unless you asked for that yourself.
It will never chase engagement for its own sake. No XP, no loud gamification — calm is the point, not a side effect.
It will never make a medical claim. This is a wellness companion, not a diagnosis — if something needs a clinician, it says so.
It will never charge before it's earned daily use. No paywall while the product is still proving itself.

On TestFlight now. Nothing to buy yet.

hyppo is real, working software — feature-complete and on TestFlight, currently going through on-device testing before the next round of invites goes out. There's no App Store listing yet, and no pricing is locked. Leave your email and we'll send an invite when there's room, and write again when there's more to say.

Draft copy. TestFlight only right now — no public App Store listing, no locked pricing.