Included Calculators & Modules

Crystal Calc Suite is a powerful offline calculator application built with 100% Kotlin and Jetpack Compose. It combines 18+ smart calculators, a comprehensive Fitness Tracker, and an intuitive EMI Loan Calculator into a single modern Android application.

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1. Daily Basis Calculators (6-in-1 Crystal Grid)

The Daily Calculator collection helps users manage everyday life with practical financial, productivity, and wellness tools.

Safe Daily Budget Allowance
Calculate safe daily spending after deducting monthly bills and savings goals.
Habit & Subscription Cost Impact
Analyze the real monthly and yearly cost of subscriptions, coffee, dining, and recurring expenses.
24-Hour Time Allocator
Visualize how daily hours are distributed between sleep, work, exercise, commuting, and free time.
Hourly Target Pacing
Calculate hourly hydration and step-count targets throughout the day.
Daily Meal Budget Divider
Divide grocery and food budgets into affordable per-meal spending limits.
Daily Energy Burn Pacing
Estimate hourly calorie burn goals using BMR and activity targets.

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2. Fitness & Athletic Calculators (12-in-1 Crystal Grid)

A complete collection of health and athletic calculators designed for everyday users, gym enthusiasts, and fitness professionals.

BMI (Body Mass Index) – Calculate body weight category using standard BMI formulas.
BMR (Basal Metabolic Rate) – Estimate minimum daily calorie requirements using the Mifflin-St Jeor equation.
TDEE (Total Daily Energy Expenditure) – Calculate total calories burned based on activity level.
Ideal Target Weight – Determine healthy body weight using Devine and Robinson formulas.
Body Fat Percentage – Calculate body fat using the US Navy circumference method.
Target Heart Rate Zones – Display Warm-up, Fat Burn, Cardio, Aerobic, and VO₂ Max training zones.
1 Rep Max (1RM) – Estimate maximum lifting capacity using Epley and Brzycki formulas.
Calorie Deficit Weight Planner – Plan safe calorie deficits for sustainable weight loss.
Daily Water Intake – Calculate recommended hydration based on body weight and activity level.
Macronutrient Split – Generate carbohydrate, protein, and fat recommendations for meal planning.
Waist-to-Height Ratio – Assess body fat distribution and health risk.
Pace & Speed Calculator – Calculate running and cycling pace and average speed.

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3. Financial EMI Loan Calculator

A modern loan calculator for personal, home, vehicle, and business financing.

Loan Monthly Repayment (EMI)
Calculate monthly installments using loan amount, interest rate, and repayment period.
Visual Loan Breakdown
Display color-coded principal versus interest values for better financial planning.

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4. Fitness Tracker & CSV Reports Hub

Track daily activities and monitor long-term progress with built-in analytics.

Daily Activity Logger
Record workouts, body weight, calories burned, water intake, and fitness notes.
Analytics Charts
View progress using interactive historical graphs and performance statistics.
CSV Data Export
Export activity records into CSV format for backup, reporting, or spreadsheet analysis.

Crystal Calculator Suite – Daily Fitness EMI and Health Calculator Kotlin app