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Watch Companion
Updated February 6, 2026
The watch companion exists for speed. It helps you capture nutrition inputs and workout context in the moment so your targets and coaching are built from real data.
What the watch companion is for
On Apple Watch, Fuel focuses on actions that benefit from being immediate.
Wrist quick log is the core workflow. It is designed for repeated meals, post training routines, and the kind of small actions that get skipped when the phone is not nearby.
Live heart zones are the other core workflow. They keep training context visible and make it easier to connect effort with fueling choices.
Installing the watch app
Fuel installs on Apple Watch through the iPhone Watch app.
- Install Fuel on iPhone and open it once
- Open the Watch app on iPhone
- Scroll to Available Apps, find Fuel, then tap Install
If Fuel is already listed under Installed on Apple Watch but you cannot find it on the watch, restart both iPhone and Apple Watch, then check again.
Watch face complications
Fuel supports watch face complications so the day stays visible without opening the app.
- Press and hold your watch face
- Tap Edit
- Swipe to the complications screen
- Tap a complication slot and select Fuel
The available complications include Calories Left, Water, Streak, and Macro Focus. They update based on the most recent watch and iPhone sync, so treat them as a glanceable summary, not a live meter.
Use Streaks to understand what counts toward the streak counter.
Wrist quick log workflow
Quick log is not a separate diary. It is a faster capture path that syncs back into the same Apple Health nutrition record stream.
- Log a meal or item from the watch when you need the entry recorded immediately.
- Use undo if you tapped the wrong entry or logged the wrong time window.
- Confirm or refine the entry on iPhone when you want higher precision.
Corrections and accuracy
Treat watch logging as the first pass. The goal is a stable daily record, not perfect restaurant grade measurement in the middle of a busy day.
If an entry needs a correction, make it the same day so daily review and weekly coaching do not learn from an error that you already know about.
When to switch back to iPhone
Use iPhone for photo based logging, recipe details, and any edit where you want full context. The watch is a capture surface, not the place for long form planning.