Herramientas de productividad

Calculate return on investment (ROI), net gain, and annualized ROI from your initial investment and returns.

Free private recovery tracker: streaks, urge timer, triggers, journal, and relapse support. Browser-based, no signup, data stays on your device.

Find how many units or how much revenue you need to cover fixed costs and break even.

Free Simon-style memory sequence practice game — watch the pattern, tap it back, and beat your best score stored in your browser.

Build a calm, practical positivity plan with thought reframes, short habits, and self-compassion prompts — not therapy, not toxic positivity.

Estimate your daily water needs from body weight, activity level, climate, and exercise duration.

Free microphone tester: check mic input, live volume levels, and record a quick playback test in your browser. No signup.

Estimate monthly mortgage payments including principal, interest, taxes, insurance, PMI, and HOA.

Convert between macronutrient grams and calories, or split a calorie target into protein, carbs, and fat.

Estimate daily protein needs from body weight, training goals, and meal count with per-meal targets.

Calculate gross profit, net profit, profit margin, and markup from revenue, cost, and expenses.

Calculate sale price, savings, and discount amount from percentage or fixed discounts.