EnduroCalc vs TreadLeft

Plan every training session and race day with EnduroCalc — the minimalist, ad-free calculator built for runners, cyclists, swimmers and triathletes. From your next half marathon to a long-distance triathlon, EnduroCalc helps you hit your target time, dial in your pace and fuel your race with confidence. NEW: CONNECT WITH STRAVA Bring your training history straight into EnduroCalc. Import your personal bests and see your equipment usage – bikes, shoes and more – so your plans are based on real data. (The Strava connection is rolling out gradually and may not be available to everyone just yet.) NEW: RACE MANAGER Add your upcoming races, plan your target splits and nutrition strategy, then analyze how the day actually went using your Strava data. Your entire season, planned and reviewed in one place. FLEXIBLE PACE CALCULATORS - Find the pace you need to hit any target time - Switch between min/km, min/mi, min/100 m, km/h and mph TRIATHLON MODE - Calculate each leg or your full triathlon time - Built-in templates for sprint, Olympic, 70.3 and full distance - Add transition times and a target finish CSS CALCULATOR FOR SWIMMERS - Find your Critical Swim Speed from two swim times - Visual training zones from recovery to VO₂max - Automatic history to track your progress SMART CARB CALCULATOR - Get your individual carbohydrate needs for endurance events - Build a personalized fueling plan, triathlon included - Pick your products – gels, bottles, bars – and export as PDF A FRESH, SPORTY DESIGN We've completely rebuilt the look and feel: cleaner, faster and more focused, with a sport-specific design language made for athletes. MINIMALIST. CLEAR. AD-FREE. No ads. No clutter. Just the numbers that matter. Built by endurance athletes, for endurance athletes.

Take control of your running gear with TreadLeft. TreadLeft connects directly to Strava and Apple Health to automate your shoe tracking. No more manual logs or guessing games—know exactly how many miles are on every pair in your rotation, how your gear is performing, and precisely when it’s time to retire them. KEY FEATURES: Seamless Activity Syncing: Connect Strava and Apple Health to import your runs instantly. We automatically match activities to your active rotation, so your dashboard is always up to date. Tactical Shoe Loadout: Build your ultimate arsenal. Assign distinct roles to your shoes (Daily Trainer, Race Day, Trail, Recovery) and monitor the health of each category at a glance to ensure your rotation is perfectly balanced. Visual Wear Tracking: See the health of your gear instantly. Colour-coded progress bars (Fresh, Worn, Critical) help you visualise wear, protect your joints from dead foam, and prevent injury. The Finishers: Every shoe has a lifespan. When it's time to put a pair out to pasture, send them to the Finishers to preserve their lifetime stats and share a custom retirement card on your feed. Advanced Analytics: Deep dive into your data. Dedicated Performance and Gear tabs show your weekly mileage trends, wear rates, and total distance across your entire inventory. Live Shoe Deals: See the best prices on the exact models you need from major retailers, updated in real time. Set a price alert, and we'll notify you the moment your shoe drops below your target—so you never miss a flash sale. Smart Dashboard: Your running command centre surfaces exactly what needs attention—unassigned runs, critical wear alerts, rest-day reminders, and automated retirement countdowns based on your actual weekly pace.