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Personal Trainer

Built around a trainer's actual day, not just the math. Onboard a new client, design programs from a 70+ exercise library, run intervals on the gym floor, track measurements over time, schedule recurring sessions with calendar export, and handle the marketing + invoicing that keeps the lights on. Everything works in your browser — no client data leaves your phone.

41 tools · 8 sections

Onboarding a new client

6 tools

First-session essentials — the assessment numbers and the screen.

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.

Ideal Weight Calculator

Calculate ideal body weight using 4 medical formulas. Compare with healthy BMI range.

TDEE Calculator

Daily energy expenditure with macro splits for cut / maintain / bulk goals.

Macro Calculator

Calculate your daily protein, carbs, and fat targets.

Designing the program

5 tools

70+ exercise library, splits, plate math, percentage work.

Workout Split Planner

Build a weekly training program from a 70+ exercise library. Print-ready, with weekly volume tracking.

One Rep Max Calculator

Calculate your 1RM from a working set. Five formulas, training percentage table.

Plate Calculator

Calculate which plates to load on a barbell to reach your target weight. Kg and lb supported.

Heart Rate Zones

Calculate your training heart rate zones.

Running Pace Calculator

Calculate running pace, finish time, or distance. Race time predictions and splits.

Running the session

4 tools

On the gym floor — timers and rest periods.

HIIT, Tabata, EMOM, AMRAP — with voice cues, audible bells, and a screen that stays on.

Focus timer with work sessions and break intervals.

Precise stopwatch with lap tracking.

Countdown Timer

Set a countdown timer with custom duration.

Tracking progress

5 tools

Measurements, photos, weekly check-ins.

Body Measurement Tracker

Log a client's weight, body comp, and measurements over time. Trend charts + CSV export.

Date Calculator

Calculate the difference between dates or add/subtract days.

Image Watermark

Add text or logo watermarks to protect your images.

Combine multiple images into a single PDF — drag to reorder.

Batch Image Resizer

Resize multiple images at once to the same dimensions.

Communicating with clients

5 tools

Drafting emails, captions, and explanations — fast.

AI Email Writer

Generate professional emails from a description.

AI Tone Changer

Rewrite text in a different tone or mood.

Rewrite text in different words while keeping meaning.

Summarize any text into key points using AI.

Explain Like I'm 5

Simplify complex text to any reading level using AI.

Scheduling

3 tools

Recurring sessions, sleep cycles, age math.

Recurring Session Planner

Generate dates for repeating appointments + a downloadable .ics calendar file.

Sleep Cycle Calculator

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

Calculate your exact age in years, months, days, and more.

Nutrition tools

4 tools

For the conversation, not the prescription.

Calorie Calculator

Calculate daily calorie needs based on your goals and activity.

Water Intake Calculator

Find out how much water you should drink daily.

Caffeine Half-Life Calculator

Track caffeine levels through the day. See when it will affect your sleep.

Peptide Reconstitution Calculator

Mixing and drawing calculator with visual syringe and vial diagrams. Free online peptide reconstitution tool.

Marketing + getting paid

9 tools

Social posts, branded handouts, invoicing.

AI Social Media Posts

Generate platform-specific social media content.

AI Hashtag Generator

Generate trending hashtags for any social media platform.

QR Code Generator

Generate fancy QR codes — colors, shapes, logo, vector export. URL, Wi-Fi, contact, email, phone, SMS.

Apply filters like brightness, contrast, blur, sepia, and more to any image.

Markdown to PDF

Convert Markdown to PDF with proper formatting. Code blocks, lists, quotes, headings. Free online tool.

Invoice Generator

Create professional invoices for your small business. Drag to reorder line items, see live totals, save as draft, mark as paid and issue a receipt in one click.

Quote Generator

Create professional quotes for your clients. Drag to reorder line items, see a live summary, save as draft or convert straight to an invoice. Numbered, in-browser, all on your device.

Receipt Generator

Quick receipts for cash, card, and bank-transfer payments. Drag-handle line items, live cash-change calculation for walk-ins, save customers for next time.

Salary Calculator

Convert between hourly, daily, weekly, monthly, and annual salary.

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.