FAQ

Apple HealthKit is the framework Apple built so apps can read and write health data on your iPhone — with your explicit permission. Think of it as a private, on-device hub for everything your devices, apps, and you log: workouts, sleep, heart rate, weight, medications, nutrition, and more.

The Health app is the visual front end — the charts and screens you can tap through. HealthKit is the data layer underneath that lets other apps talk to that hub. RTO reads from HealthKit so it never has to ask you to manually re-enter what other apps already know about your training and your body.

Most modern fitness devices and health apps will automatically write to HealthKit once you grant them permission. The easiest single source is an Apple Watch — it logs sleep, heart rate, workouts, and heart rate variability without any additional setup.

Other common ways data lands in HealthKit:

• RTO itself — log food in RTO by photo or natural language; entries are written back to HealthKit. (See the food-logging question below.)
• Third-party trackers (Garmin, Whoop, Oura, Fitbit) — install their iPhone app and allow HealthKit access in its settings.
• Workout apps (Strava, Peloton, Nike Run Club, TrainerRoad) — your sessions sync to HealthKit when permission is granted.
• Smart scales (Withings, Eufy, Renpho) — weight and body composition flow in automatically.
• Other nutrition apps (MyFitnessPal, Cronometer, Lose It!) — food and macros, if you already use one.
• The Apple Health app itself — for anything that doesn't have a connected device, you can log it by hand.

Apple's Health app includes the ability to log medications and set reminders. When you log your GLP-1 medication and dose in HealthKit, it will be accessible to RTO — and RTO will use that schedule to interpret the rest of your data (recovery shifts after a dose, appetite changes, training response).

In Health, go to Browse → Medications → Add a Medication, search for your GLP-1 (Ozempic, Mounjaro, Wegovy, Zepbound, etc.), then enter your dose and set the schedule. Health will send reminders, log each dose you confirm, and quietly hand that information to RTO.

Alternatively, you can log your doses directly in the RTO app; however, doses logged in RTO won't flow back into HealthKit. If you want one canonical record of your medication history that follows you to other apps and to your prescriber, log it in Health.

RTO is built to make food logging feel like sending a quick text — not filling out a database form. You log a meal two ways:

• Take a photo. Snap your plate, your bowl, your menu. RTO's vision model identifies the items, estimates portions, and calculates nutrition. Confirm or correct, then save.
• Describe it in plain language. Type or dictate something like "for lunch I had a bowl with half a cup of quinoa and half a cup of fried tofu" and RTO parses the meal, ingredients, and amounts into proper nutrition entries.

Every meal you log in RTO is written back to Apple HealthKit, so your food data joins the rest of your health record — available to other apps, visible in the Health app, and useful when you share data with a coach or dietitian.

On the Free plan, you get 3 photo food logs per day. On Pro, photo logging is unlimited. Natural-language entries don't count against the photo limit.

The easiest way is to wear an Apple Watch when you sleep — it logs sleep stages, duration, and a Sleep Score that RTO can read directly.

Any other smart sleep tracker that integrates with HealthKit will also work — Whoop, Oura, Garmin, and most fitness rings or watches export sleep data via HealthKit. If you don't have a smart sleep device, using the Sleep Schedule on your iPhone (Health → Browse → Sleep → Schedule) will log sleep hours based on when you're in bed.

Any smart scale that supports HealthKit will log your weight directly into HealthKit and make it available to RTO. Withings, Eufy, Renpho, and most major scales work this way — step on, sync, done.

If you don't have a smart scale, you can enter your weight manually in the Apple Health app (Browse → Body Measurements → Weight → Add Data) and it will be available to RTO. Even a weekly weigh-in is enough for RTO to start surfacing meaningful trends.