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There are a few ways, and all of them are quick:

Describe it: type or dictate your meal in plain English — "two eggs on toast with butter and an orange juice". On-device AI splits it into individual foods with portions and nutrition, which you can review and adjust before saving.

Scan it: scan a product's barcode, or point the camera at a nutrition label, and Sapida fills in the details.

Search or reuse: search the food databases directly — results learn which foods you actually eat, so your staples float to the top — or save meals you eat often as templates and favourites for one-tap logging. Any food you've already logged can be saved to My Foods for reuse.

Sapida looks at what you ate in the hours before each symptom entry and compares how bad your symptoms were after a given ingredient with how bad they were otherwise. It then checks whether that difference is larger than chance alone would produce, and accounts for the fact that testing many ingredients at once throws up false positives. The same comparison runs at the FODMAP-group level. All of it is computed on your device.

Every method has a plain-English write-up in the app under Settings → How analysis works, including what it can't tell you and whether it follows a published method or is our own reasonable-looking heuristic.

The more consistently you log — both meals and symptoms, including days you feel fine — the more reliable the results become. An ingredient you eat every single day has nothing to be compared against, so it can't be tested at all. Sapida shows associations in your data; it's a tool for spotting patterns to discuss with a healthcare professional, not medical advice or a diagnosis.

Reading: with your permission, Sapida imports your sleep, steps, walking and running distance, active energy, exercise time, resting heart rate and workouts, and shows them alongside your food and symptom log. It asks for nothing else.

Writing: optionally, and off by default. Turn on Settings → Nutrition Sharing → Write Nutrition to Health and the calories, protein, carbs, fat and fibre from the food you log are written into Apple Health, so they show up next to data from your other apps. Edit or delete a food entry in Sapida and the matching entry in Health is updated or removed. Sapida never reads nutrition back out of Health.

Turning it off: switch the toggle off and Sapida stops writing. Anything already written stays in Apple Health — remove it there under Sharing → Apps → Sapida, which is also where you change or revoke either permission. iOS doesn't tell apps which read permissions are currently granted, so the Health app is always the place to check.

Yes. Your food diary, symptoms and Apple Health data are stored only on your device — there's no account, no Sapida server and no analytics or tracking. Thousands of foods ship inside the app, so many lookups never leave your phone at all; when one does, all that's sent is the food name or barcode, plus the country your device is set to so results favour local products. Details are in the privacy policy.

Sapida+ is billed through your Apple account, so it's managed in iOS, not in the app: open Settings → your name → Subscriptions → Sapida (or the App Store app → your profile picture → Subscriptions), where you can switch plans or cancel.

Note that deleting the app does not cancel a subscription. Refunds are handled by Apple at reportaproblem.apple.com.

Export: Anyone can export their full history as CSV or JSON from the app, free and share or save it anywhere — handy for appointments with a dietitian or GP. The export covers your food and symptom log plus the daily sleep and activity summaries imported from Apple Health.

Delete: you can delete individual entries at any time, or wipe everything at once with Clear All Data in the app's Settings. Deleting the app also removes all Sapida data, since everything is stored on-device. The one exception is nutrition Sapida has written into Apple Health, if you turned that on — that lives in Health, so delete it there under Sharing → Apps → Sapida.

Sapida searches a database of common products built into the app first, then Open Food Facts and USDA FoodData Central. Online results favour products sold in the country your device is set to, with worldwide results as back-up, and recent searches are remembered so they keep working offline. Between them the databases cover a huge range, but not everything — some regional or own-brand products are missing or incomplete, and searching the online databases for the first time needs a connection.

If a food isn't found, you can scan its nutrition label instead, or create a custom food with your own values — it's saved for reuse and works offline.