Fitness tracking that thinks for itself.
Fuelog fuses macros, workouts, and recovery into one AI-powered app. Point your camera at a meal, log a lift, sync your wearable — Fuelog handles the math and tells you what actually matters.
Your training plan's other half.
You'll follow a 20-week plan down to the session. Fuelog writes the nutrition side of it — periodized carbohydrate, a race-day plan leg by leg, and a gut-training ramp to make that plan achievable.
Periodized carbohydrate
3 to 12 g/kg, decided daily
A rest day and a six-hour ride are not the same nutrition problem, and no single multiplier can express a four-fold range. Fuelog sets carbohydrate from your actual training load, then scales the curve by where you are in the season.
Carbohydrate is reserved first, before protein and fat, because for an endurance athlete it is the macro the day is built around. When the calorie budget cannot hold all three, Fuelog reports the shortfall instead of quietly shaving carbs.
Race day
Carbs per hour, leg by leg
The same athlete has a different gut on the bike than on the run. So Fuelog prescribes nothing in the water, runs the bike slightly above your target rate, and drops the run about 25% below it — then caps the whole plan at the rate you have actually trained.
Illustrative 70.3 split for an athlete whose plan comes out at 86 g/h. Your own rate, fluid and sodium come from your weight, your goal time, your sweat test and your trained tolerance.
No sign-up, no email gate. Same engine as the app.
Gut training ramp
90 g/h is a trained number, not a starting point. Fuelog builds the ramp at about +10 g/h every two and a half weeks — 60 to 90 g/h is roughly eight weeks of practice, 60 to 110 is about thirteen. If the race is too close to close the gap, the plan says so and caps you at the rate you can actually reach.
Energy availability
Intake minus training energy, divided by fat-free mass. Fuelog computes it from your logged food, your wearable, and your InBody scan, and shows where it sits against the published 30 and 45 kcal/kg FFM/day markers. Most trackers show calories in and calories out and stop there.
The carb-load window
Loading only makes sense for races long enough to deplete glycogen, so Fuelog opens the window 36–48 hours out for events over 90 minutes, and targets 10.5 g/kg — 11.5 g/kg once the race runs past four hours. Shorter than that and it stays shut.
Fluid and sodium from your own test
Enter a weigh-in sweat test and Fuelog works from your number instead of the 0.9 L/h population default. It replaces 70% of losses rather than 100%, adds 25% for a hot race day, and turns your sweat sodium into milligrams per leg.
Mixed carbs above 60 g/h
Glucose transport saturates near 60 g/h. Any time your prescribed rate goes above it, Fuelog flags that you need a glucose:fructose blend around 1:0.8 — a single-source gel physically cannot absorb fast enough past that ceiling.
Sprint through full distance
Sprint, Olympic, 70.3 and Ironman course splits are built in. Give it a goal finish time and it estimates your swim, bike and run durations, then fuels each one separately instead of averaging the whole day into one number.
Educational tool, not medical or dietary advice. Never try a new fueling plan for the first time on race day.
Everything you need. Nothing you don't.
Fuelog replaces your food log, workout tracker, and recovery dashboard with one connected system.
AI food photo scanning
Point your camera at any meal and Fuelog identifies it, estimates portions, and logs a complete macro breakdown in seconds. No searching, no guessing.
Workout logging that tracks overload
Log lifts with a calendar view of every session, and let Fuelog surface progressive overload trends so you know exactly when to push harder.
Dynamic macro targets
Your targets shift automatically based on calories burned that day — no manual recalculating.
Barcode scanner
Scan any packaged food for instant, accurate nutrition data pulled from a massive product database.
Recipe builder
Build recipes once and log full meals in a single tap, with macros calculated per serving.
Siri Shortcuts
"Hey Siri, what are my macros today?" Get instant answers without opening the app.
Progress photos & InBody
Track visual progress and body composition scans side-by-side with your nutrition history.
AI coaching & weekly insights
Get a personalized weekly breakdown of trends, wins, and what to adjust — like a coach in your pocket.
From meal to insight in four steps
No spreadsheets, no manual calorie math. Fuelog connects the dots for you.
Scan or log in seconds
Snap a photo, scan a barcode, or search a meal. Fuelog handles the macro math instantly.
Sync your wearable
Connect Whoop or Apple Watch so Fuelog knows your recovery, sleep, and calories burned.
Get dynamic targets
Your macro goals adjust automatically based on activity — eat more on high-burn days, less on rest days.
Follow AI insights
Weekly breakdowns highlight trends and tell you exactly what to change to keep progressing.
Your wearable, plugged straight in
Fuelog reads your recovery data and adjusts your nutrition plan to match — no manual entry required.
Whoop
Strain, recovery, and HRV flow straight into your daily targets.
Apple Health
Steps, workouts, sleep, and heart rate sync automatically via HealthKit.
Apple Watch
Log workouts and see live macro rings right from your wrist.
Oura
Sleep and readiness data from your Oura Ring, integrated with Fuelog.
Loved by people who train hard
Real reviews coming soon — this section is ready for launch feedback.
“Placeholder testimonial — swap in a real quote about how Fuelog's photo scanning replaced manual food logging.”
“Placeholder testimonial — swap in a real quote about dynamic macro targets adjusting to training days.”
“Placeholder testimonial — swap in a real quote about Whoop recovery data syncing with nutrition targets.”
Stop guessing.
Start tracking smarter.
Fuelog is free to download on the App Store. Scan your first meal in under a minute.
Available for iPhone · Requires iOS · Free to start