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Settings and Preferences

Updated March 28, 2026

Settings exist to make the product match your constraints, so the plan is sustainable rather than fragile.

Appearance

Fuel supports light and dark appearance modes. Pick the mode that keeps the app usable during the times you log most often, since friction is the enemy of consistent tracking.

Units and localization

Use units that match how you think and how your food is labeled. The best unit system is the one that produces consistent logging without constant conversion.

Use Supported Languages for the current list of interface languages and how to switch.

Coaching preferences

Coaching becomes more useful when it knows your constraints.

Set preferences that influence the plan you want, such as typical meal timing, training schedule, and the level of strictness you can follow without rebound behavior.

Coach Personality controls the tone of coaching across reviews and chat. Coach Context lets you add personal details like obstacles, motivations, and your weekly activity level so the coach has more to work with.

Notifications and reminders

Use reminders only for the events that are repeatedly missed, such as weigh ins or late day logging. Too many reminders produce alert fatigue and stop being useful.

Use Smart Notifications for a precise breakdown of daily and weekly review notifications, smart reminders, smart timing, reminder windows, and quiet hours.

On-device AI

Fuel can generate small wording variants for some notifications so repeated reminders do not look identical across days.

Use Notification Variations to understand eligibility, language support, and what changes and what does not.

AI Assistant

Fuel includes an "Ask your assistant" tile on Today that launches your preferred AI app with copied coach context, so you can continue a coaching conversation in your favorite assistant.

In You > Settings, the AI Assistant picker shows install-aware recommendations for compatible AI apps. Pick the assistant you want, and the tile on Today will launch it directly.

Dynamic Calories

Dynamic Calories lets your daily calorie target move with activity. Enable it from your Plan settings.

See Dynamic Calories for workout inclusion, rollover, and how it interacts with your plan.

Net Carbs

Fuel can show Net Carbs instead of total carbohydrates if that matches the way you plan meals.

Turn this on in App Preferences when you want Fuel to subtract fiber from the carb budget display without changing your logged calories or total carbs.

See Net Carbs for the full setup and what changes after you enable it.

iCloud Backup

Fuel can back up your setup for a future restore with iCloud Backup.

Use this when you are moving to a new device or want a simple way to save your profile, plan, streaks, coach settings, and preferences.

See iCloud Backup for backup, restore, and what is not included.

Today view

Today is configurable.

Use Today View Personalization to tune calendar rings, the calories card display, which nutrition cards appear, and whether a manual Log Workout action is shown.

Plan speed

Speed Multiplier controls how aggressive your calorie adjustment is. A higher multiplier means a larger daily deficit (or surplus if gaining), which shortens your goal timeline but requires stricter adherence. Find this under your plan settings on the You tab.

Deficit calculation

Fuel offers two modes for computing your daily target. Dynamic TDEE recalculates throughout the day using live Apple Health data so the target reflects what you are actually burning. Standard uses a stable baseline from your basal energy and average activity. Pick Dynamic TDEE if your activity varies day to day. Pick Standard if you prefer a fixed number.

Week start day

Choose whether your week starts on Sunday or Monday. This affects how weekly reviews, streaks, and Plan Progress group your days. Set it under your preferences on the You tab.

BMI

The BMI card on the You tab shows your current body mass index on a color-coded range bar. Tap it for detail including an ideal weight range, formula-based target ranges (Hamwi, Devine, Robinson, Miller), and maximum muscular potential estimates at different body fat percentages.

When settings do not fix the problem

If a view is wrong, the cause is often missing data, not a display option. Confirm Apple Health permissions first, then use troubleshooting steps.