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Gf

General Fitness

The cross-sport fitness essentials. Tabata / HIIT interval timer for any work-rest pattern. Calorie + macro math for the diet side. Heart rate zones for any cardio. Pace + 1RM for the basics. Use this kit alongside whatever specific sport kit you train in — these tools work for everyone.

12 tools · 5 sections

Intervals + timers

3 tools

Tabata, HIIT, custom work/rest cycles.

Focus timer with work sessions and break intervals.

Precise stopwatch with lap tracking.

Countdown Timer

Set a countdown timer with custom duration.

Diet + macros

3 tools

Daily calorie targets, macro splits, water intake.

Calorie Calculator

Calculate daily calorie needs based on your goals and activity.

Macro Calculator

Calculate your daily protein, carbs, and fat targets.

Water Intake Calculator

Find out how much water you should drink daily.

Heart rate + body comp

4 tools

Training zones from age + max HR. BMI, body fat, waist-hip.

Heart Rate Zones

Calculate your training heart rate zones.

Calculate your Body Mass Index with visual results and tracking.

Body Fat Estimator

Estimate body fat percentage using measurements.

Waist-to-Hip Ratio

Calculate your waist-to-hip ratio (WHR) and health risk category. Free online WHR calculator.

Sleep + recovery

1 tools

Sleep cycle bedtime calc, sedentary-sit reminder.

Sleep Cycle Calculator

Calculate the best time to wake up or go to bed based on 90-minute sleep cycles.

Coaching + tactics

1 tools

Formation board for any team sport.

Formation Board

Drag player pins onto a pitch to draw a formation, set play, or starting lineup. Six sports — soccer, basketball, American football, ice hockey, rugby, netball. Full names + jersey numbers + positions. Bench / subs row per team. Paste a roster, export as PNG.

Looking for something specific? Browse all 240 tools.

Built browser-first. Run by one developer.

Every tool runs on your device. No tracking pixels, no sign-up to start. The numbers below are pulled live from the registry.

240

Free tools

Across 14 categories

7

Visual editors

PDF · image · video · audio

32

Curated kits

By profession + lifestyle

17

AI tools

Powered by Claude API

Files never uploadNo tracking pixelsNo sign-up neededWorks in any modern browser

The handful of AI tools (paraphrase, summarise, blog, captions, etc.) send your prompt text to Anthropic's Claude API to do the work. Files, images, PDFs and video never leave your device. Pick the tools that fit your privacy comfort.