# Mariposas Fitness > Mariposas is a free iOS workout app that turns training into a game: log strength workouts, GPS runs, and studio classes to earn Gashapon capsule spins and collect cute watercolor pets and outfits, with streaks and a friends feed to keep you consistent. ## About Mariposas Fitness is a free iOS workout app. Download: https://apps.apple.com/us/app/mariposas-fitness/id6774996917 Key features: - Collect cute watercolor pets by completing workouts - Earn Gashapon capsule spins for every logged workout, run, or class - Track strength workouts with sets and reps - Built-in GPS run tracking - Log studio and gym classes with calorie estimates - Daily streaks and weekly goals - Friends feed and accountability - Unlockable outfits to dress your collected pets - Free on iOS This site also publishes free, independent fitness tools and guides. Content is general fitness information, not medical advice. ## Fitness calculators - [One-Rep Max Calculator](https://mariposas.fit/tools/one-rep-max-calculator): Estimate your 1RM from any set + a full %-of-max table. - [TDEE Calculator](https://mariposas.fit/tools/tdee-calculator): Find your daily calorie needs to maintain, cut or bulk. - [BMI Calculator](https://mariposas.fit/tools/bmi-calculator): Body Mass Index and the healthy-weight category. - [Running Pace Calculator](https://mariposas.fit/tools/running-pace-calculator): Pace, speed and km↔mi from your distance and time. - [Calories Burned Calculator](https://mariposas.fit/tools/calories-burned-calculator): Calories burned for 100+ activities, by weight & time. - [Macro Calculator](https://mariposas.fit/tools/macro-calculator): Protein, carbs and fat grams from your calorie target. - [Barbell Plate Calculator](https://mariposas.fit/tools/barbell-plate-calculator): Which plates to load on each side of the bar. - [Wilks Calculator](https://mariposas.fit/tools/wilks-calculator): Your Wilks strength score from your powerlifting total. - [DOTS Calculator](https://mariposas.fit/tools/dots-calculator): The modern DOTS strength score. - [Warm-Up Set Calculator](https://mariposas.fit/tools/warmup-set-calculator): A warm-up ramp to your working weight. - [Body Fat Calculator](https://mariposas.fit/tools/body-fat-calculator): Estimate body fat with the US Navy tape method. - [Lean Body Mass Calculator](https://mariposas.fit/tools/lean-body-mass-calculator): Your lean (fat-free) mass via the Boer formula. - [FFMI Calculator](https://mariposas.fit/tools/ffmi-calculator): Fat-Free Mass Index, muscle relative to height. - [Ideal Weight Calculator](https://mariposas.fit/tools/ideal-weight-calculator): Ideal body weight across four classic formulas. - [BMR Calculator](https://mariposas.fit/tools/bmr-calculator): Calories you burn at complete rest. - [Water Intake Calculator](https://mariposas.fit/tools/water-intake-calculator): A daily water target from your weight & activity. - [Protein Calculator](https://mariposas.fit/tools/protein-calculator): Daily protein for your goal. - [Weight Loss Calculator](https://mariposas.fit/tools/weight-loss-calculator): How long to reach your goal weight. - [VO₂ Max Calculator](https://mariposas.fit/tools/vo2-max-calculator): Estimate aerobic fitness from a field test. - [Heart Rate Zone Calculator](https://mariposas.fit/tools/heart-rate-zone-calculator): Your five training zones in bpm. - [Race Time Predictor](https://mariposas.fit/tools/race-time-predictor): Predict a race time from a recent result. - [Steps to Distance Calculator](https://mariposas.fit/tools/steps-to-distance-calculator): Convert step count to miles or km. - [Pace Converter](https://mariposas.fit/tools/pace-converter): Convert pace between min/mile, min/km and mph. - [kg to lbs Converter](https://mariposas.fit/tools/kg-to-lbs-converter): Convert kilograms to pounds. - [lbs to kg Converter](https://mariposas.fit/tools/lbs-to-kg-converter): Convert pounds to kilograms. - [Miles to km Converter](https://mariposas.fit/tools/miles-to-km-converter): Convert miles to kilometers. - [km to Miles Converter](https://mariposas.fit/tools/km-to-miles-converter): Convert kilometers to miles. - [Strength Standards Calculator](https://mariposas.fit/tools/strength-standards): See if your lift is novice, intermediate, advanced or elite. - [Running Calorie Calculator](https://mariposas.fit/tools/running-calorie-calculator): Calories burned running, by pace, incline & weight. - [Calorie Target Calculator](https://mariposas.fit/tools/calorie-targets): Maintenance, cut and bulk calories from your TDEE. - [Macro Percent to Grams Calculator](https://mariposas.fit/tools/macro-percent-to-grams): Convert macro percentages into protein, carb & fat grams. - [Carb Loading Calculator](https://mariposas.fit/tools/carb-loading-calculator): Carb-loading target for endurance race day. - [Body Surface Area Calculator](https://mariposas.fit/tools/body-surface-area): Your body surface area (Mosteller formula). - [Waist-to-Hip Ratio Calculator](https://mariposas.fit/tools/waist-to-hip-ratio): A quick body-shape health screen. - [Waist-to-Height Ratio Calculator](https://mariposas.fit/tools/waist-to-height-ratio): A simple "keep your waist under half your height" check. ## App comparisons (Mariposas vs other fitness & pet apps) - [Mariposas vs Strong](https://mariposas.fit/vs/strong): A clean, no-frills strength-training logger loved by serious lifters. - [Mariposas vs Hevy](https://mariposas.fit/vs/hevy): A generous free workout tracker with a social feed and shareable routines. - [Mariposas vs JEFIT](https://mariposas.fit/vs/jefit): A long-running app with a massive exercise database and structured programs. - [Mariposas vs MyFitnessPal](https://mariposas.fit/vs/myfitnesspal): The best-known calorie and nutrition tracker, with a giant food database. - [Mariposas vs Fitbod](https://mariposas.fit/vs/fitbod): An app that auto-generates workouts based on your equipment and recovery. - [Mariposas vs Wokamon](https://mariposas.fit/vs/wokamon): A cute pedometer game where your steps grow and hatch little monster pets. - [Mariposas vs CalPets](https://mariposas.fit/vs/calpets): A cute buddy that evolves as you burn calories or hit step goals, with unlockable outfits. - [Mariposas vs Walkr](https://mariposas.fit/vs/walkr): A polished step game that turns your walking into fuel for a spaceship and a growing galaxy. - [Mariposas vs FitPets](https://mariposas.fit/vs/fitpets): A step-and-calorie goal app where hitting targets hatches and evolves a cute pet. - [Mariposas vs DigiBuddy](https://mariposas.fit/vs/digibuddy): A virtual pet that you care for through your daily steps and exercise. - [Mariposas vs Motion](https://mariposas.fit/vs/motion): A gamified fitness app with “Motmot” pets that grow as you move and complete challenges. - [Mariposas vs Finch](https://mariposas.fit/vs/finch): A self-care app where a virtual bird grows as you complete mental-health and wellbeing tasks like mood check-ins, journaling and breathing. - [Mariposas vs GymPet](https://mariposas.fit/vs/gympet): A free, privacy-first gym logger where each workout you log levels up a virtual pet. - [Mariposas vs PalGo](https://mariposas.fit/vs/palgo): A free virtual-pet game that connects to Strava and turns your synced workouts into XP to grow and battle a creature. ## Guides - [How to Start Working Out: A Complete Beginner’s Guide](https://mariposas.fit/learn/how-to-start-working-out) - [Progressive Overload: The Key to Getting Stronger](https://mariposas.fit/learn/progressive-overload) - [How Many Sets and Reps Should You Do?](https://mariposas.fit/learn/how-many-sets-and-reps) - [What Is DOMS? Muscle Soreness After Exercise Explained](https://mariposas.fit/learn/what-is-doms) - [Compound vs Isolation Exercises: What’s the Difference?](https://mariposas.fit/learn/compound-vs-isolation) - [How Often Should You Work Out?](https://mariposas.fit/learn/how-often-should-you-work-out) - [How to Build a Workout Habit That Actually Sticks](https://mariposas.fit/learn/how-to-build-a-workout-habit) - [When Is the Best Time to Work Out, Morning or Evening?](https://mariposas.fit/learn/best-time-to-workout) - [How Much Protein Do You Need to Build Muscle?](https://mariposas.fit/learn/how-much-protein) - [Calorie Deficit Explained: How to Lose Fat Sustainably](https://mariposas.fit/learn/calorie-deficit-explained) - [Push/Pull/Legs (PPL): The Complete Guide](https://mariposas.fit/learn/push-pull-legs-explained) - [Couch to 5K: The Complete Beginner Running Guide](https://mariposas.fit/learn/couch-to-5k-guide) - [HIIT vs Steady-State Cardio: Which Is Better for Fat Loss?](https://mariposas.fit/learn/hiit-vs-steady-state-cardio) - [Gym Etiquette: 12 Unwritten Rules Every Beginner Should Know](https://mariposas.fit/learn/gym-etiquette) - [How to Get Back Into Working Out After a Break](https://mariposas.fit/learn/getting-back-into-working-out) - [All guides](https://mariposas.fit/learn) - [Best gamified fitness apps](https://mariposas.fit/best-gamified-fitness-apps) ## Reference - [Exercise library (form guides + demo videos)](https://mariposas.fit/exercises) - [Class calorie tables](https://mariposas.fit/classes) - [Running plans](https://mariposas.fit/running) - [Fitness glossary](https://mariposas.fit/glossary) - [About / who publishes this](https://mariposas.fit/about)