Honest instruments for your body and your data.

A small independent lab building the health apps the big companies won't: everything on your device, nothing on our servers, no one reading your numbers but you. Dead serious about your privacy. A lot less serious about most other things.

House rules

Privacy by architecture: Your data lives on your devices. We run no servers and keep no accounts, so there's nothing to leak, sell, or hand over, and nothing we could read even if we wanted to.
Honest by default: Our apps tell you what your data says, then stop. No fake precision, no streak guilt, no confetti, no lectures.
Yours to keep: Everything exports to a plain file you own. Delete the app tomorrow and you lose nothing but the app. No lock-in, because there's nothing to lock.
AI, pointed at the boring part: We like AI. We just point it at the busywork, turning a photo or a spoken "two eggs and toast" into a fast, honest estimate, on your device or a key you control. Not at coaching you, grading you, or learning who you are.

On the bench

Delta Strength & Cardio

Your training in a notebook that fights back. Sets prefilled from last time, honest PRs, the workout run from your wrist, and real math on your numbers.

deltastrength.app ↗ Coming soon

Sigma Food & Calories

The sum of what you eat. Scan it, snap it, or just say what you ate, and get an honest ballpark. Never a lecture, never a fake-precise number you'll pretend to believe.

sigmanutrition.app ↗ In development

Things we don't do

accounts
ads
subscriptions
data collection
AI coaches
growth teams
investors

Lesko Labs is one stubborn engineer and a family that beta-tests everything. We log our workouts and lunches too, and the only rule is that the tools have to be good enough that we keep using them. That's the whole business plan.