Four standalone fitness tools that run entirely in your browser. No sign-up, no subscription, no data collection. Your workout history lives on your device and goes nowhere else.
Track the classic 5×5 barbell program. Auto-progresses your weights and deloads when you stall.
Open tracker →Follow a structured run/walk program from zero to 5K. Built-in interval timer guides every session.
Start running →Configurable work/rest timer with audio cues. Save custom workouts for Tabata, EMOM, and more.
Start timer →Estimate your 1RM from any rep count. Includes percentage chart and visual plate loading diagram.
Calculate →Most fitness apps are overengineered. They want you to create an account before you've lifted a single rep, push notifications, sync your data to their servers, and eventually upsell you to a paid tier. The tools that do the least tend to charge the most for the privilege of doing it.
These four tools do one thing well each. The 5×5 tracker logs your barbell program and handles weight progression automatically. The Couch to 5K runner walks you through nine weeks of intervals until you can run 30 minutes straight. The HIIT timer counts work and rest so you don't have to stare at a clock. The 1RM calculator gives you a percentage chart you can actually use for programming.
Everything runs in your browser. There's no server receiving your reps, no account tied to your email, no analytics scripts watching which buttons you tap. Your data lives in your browser's localStorage — meaning it stays on your device, it's private by default, and it works offline once the page has loaded.
If you want a backup, every tool has an export button. If you change devices, import that backup. That's the whole data story. No cloud required.