Runtrition vs CarbRate

Plan your race nutrition with science-backed precision. Runtrition simulates glycogen depletion and tells you exactly when and what to eat during marathons, half marathons, ultras, and long training runs — so you never bonk. SMART NUTRITION PLANNING Enter your race distance, target pace, and body weight. Runtrition calculates your carb burn rate and creates a personalized fueling schedule with precise timing for every gel, chew, or drink. GLYCOGEN DEPLETION ENGINE See exactly when your body will run out of fuel. The app models glycogen stores based on your weight and shows a minute-by-minute simulation of energy depletion — and how each fuel stop keeps you going. TRAINING & GUT PREPARATION • Training Mode — practice nutrition during long runs with real-time tracking • Gut Training Plan — progressive program to build stomach tolerance over weeks • Rate gut comfort and get personalized recommendations RACE DAY FEATURES • Live Activity with lock screen fuel countdown and Dynamic Island • Apple Watch companion with haptic fuel and hydration reminders • Pre-race meal planner with carb-loading guidance • Weather-adjusted hydration recommendations MULTI-DAY & ULTRA SUPPORT • Plan nutrition for stage races and multi-day events • Per-stage breakdown with recovery guidance between stages • 5K to 100-mile distance presets plus custom distances INSIGHTS & ANALYSIS • Race history charts showing trends across all logged races • GI issue tracking and analysis • Compare nutrition plans side by side MORE FEATURES • Custom fuel creation with full nutrition profiles • Caffeine tracking with optimal timing • Export plans as PDF to share with your crew • Siri Shortcuts — ask "What's my next gel?" hands-free • iCloud sync across all your devices • Apple Health integration for weight sync FREE & PRO The core planner is completely free. Upgrade to Pro to unlock custom fuels, plan comparison, race logging, and advanced features. Whether you're running your first half marathon or your tenth ultra, Runtrition ensures your nutrition plan is as prepared as your training.

Tired of hitting the wall in the half, the marathon, or an ultra? CarbRate builds you an individualized fueling plan for your race. It tells you exactly how much, when, and what to eat and drink, to maximize your race day performance. Your fueling plan is built around your goal time, how fast your body burns glycogen, your measured sweat rate, your actual course, the gels and drinks you prefer, and the weather on race day. You also get detailed practice instructions to train your gut before the race. And on race day, CarbRate guides you through the plan live, so you don't have to remember any of it. BUILT FOR YOUR EXACT COURSE Pick your race and CarbRate builds your plan around its hills and aid stations. It places every gel and drink where there's water to wash it down, and times any caffeine you take to peak in the hardest miles. If your race isn't listed, CarbRate builds your plan from your distance and goal time instead. PERSONALIZED TO YOUR BODY AND GOAL Your weight, goal time, and sweat rate change how much fuel you need, and your stomach changes how much you can take in. A guided sweat test, a weigh-in before and after a normal run, turns sweat rate from a guess into a measured number. Log your runs and they teach CarbRate what your stomach handles, so your fuel targets rise as your gut adapts. READY FOR RACE-DAY WEATHER On a hot day, CarbRate shifts carbs from gels into your drink, so you take in fluid and fuel together and your stomach stays settled. Whatever the forecast does before race day, CarbRate updates your plan to match. LIVE GUIDANCE THROUGH EVERY GEL AND DRINK On race day, a calm voice prompt from your phone announces each gel and drink before it's due. The screen stays in your pocket, and the plan does the thinking for you. TRAIN YOUR GUT TO HANDLE MORE FUEL Your stomach can learn to absorb more carbs per hour, and that extra fuel is what keeps your pace from fading in the last miles. CarbRate turns your long runs into fueling rehearsals, and you log how each one went. Then it tells you the one change to make next time: push to 80 grams an hour, take your first gel earlier, or swap the gel that upset your stomach. USE THE PRODUCTS YOU ALREADY LIKE Your plan is built from the fuel you already train with: more than 160 gels, chews, and drink mixes with verified carb counts. If your favorite isn't listed, add your own. KNOW WHY YOUR PLAN WORKS An 8-module course explains your plan, covering hydration, glycogen, gut training, carb loading, the taper, and which supplements are worth your money. By race day, you understand every line of your plan, and trust it in the late miles. WHAT'S FREE Answer a few quick questions and get a real plan: your carb and fluid targets for the whole race, a chart of your fuel level mile by mile, and the first hour of your race-day schedule. You also get the first course lesson, one guided sweat test, a race countdown with daily fueling tips, and you can add your own products. The free version never expires. WHAT PRO ADDS Your complete race-day schedule, from the first gel to the finish line. The full fueling course. Unlimited sweat tests. Tracking for every practice run, with feedback on what to change next. A carb-loading plan for the final days before your race. And live voice guidance on race day itself. If your CarbRate account includes Pro, the app turns it on automatically. SUBSCRIPTION DETAILS CarbRate Pro is available as an auto-renewing subscription: $9.99 per month or $89.99 per year. A Race Pass is a single $49.99 purchase that unlocks Pro for 18 weeks and does not renew. Payment is charged to your Apple Account at purchase. A subscription renews automatically unless auto-renew is turned off at least 24 hours before the period ends. Manage or cancel it in your Apple Account settings. Terms of Use: https://carbrate.com/terms Privacy Policy: https://carbrate.com/privacy Download CarbRate and see your free plan before your next long run.