Aerko_

The ultra-private, local-first fitness PWA. No subscriptions

Visit aerko.app ↗Alternativestop 22% of March 2026

What it does

A brutalist fitness tracker built for privacy. Aerko_ keeps your workout data encrypted on your device (AES-256) and uses local AI for real-time biomechanical analysis. Fully localized in English, Spanish, German, French, and Portuguese with zero cloud dependencies and no paywalls. Just your health data in your control.

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Hi HN, My motivation for this came from frustration with existing workout trackers. Most felt clunky, hid core features like performance graphs behind a paywall, or forced a native app download. A few people close to me who take their training seriously shared the same sentiment, so I decided to build my own. I'm working on mTOR, a free, science-based workout tracker I built to automate progressive overload. It's a local-first PWA that works completely offline, syncs encrypted between your devices using passwordless passkeys, and allows for plan sharing via a simple link. The core idea is to…
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