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It first estimates your BMR, the energy your body uses at rest. By default it uses the Mifflin-St Jeor equation, from your age, sex, height and weight. If you enter your body fat percentage, it uses Katch-McArdle instead, which works from your lean mass.

It then multiplies your BMR by your activity level to get your maintenance calories (TDEE): 1.2 for sedentary, 1.375 for lightly active, 1.55 for moderately active, 1.725 for very active and 1.9 for athletes. Finally it adds or takes away calories for your goal.

Your plan sets how your calories split between protein, fat and carbs. High protein aims for 2 g of protein per kg of body weight (or 2.5 g per kg of lean mass if you entered body fat), kept between 30% and 40% of your calories. Custom lets you set the split yourself.

Yes. Baseline checks your App Store purchase history and unlocks Plus automatically. If it doesn't, open Settings and tap Restore purchases. Make sure you're signed in with the same Apple Account you used for the tip.

Open Settings and tap Restore purchases. Plus also works for everyone in your Family Sharing group.

It only reads your weight, height, body fat, date of birth and biological sex, to fill in your details and keep them up to date. It never writes to Health, and your data never leaves your device. You can turn off access in the Health app at any time.

Tap Start over in Settings, or delete the app. Baseline has no account or server, so there's nothing stored anywhere else.

Yes. On iPad and on iPhone Duo's inner display, your targets and macros sit side by side. It also works in Split View.

No. Baseline gives estimates based on widely used formulas. Talk to a doctor or dietitian before making big changes to your diet, especially if you're pregnant, have a medical condition or are under 18.