Works in airplane mode

Last updated 17 September 2026

Your data is on your phone, so the app does not need the internet to work. Almost all of Vitals runs with the radio off.

Works with no connection

Logging food by hand, from a favourite, or from a meal you prepped
Your whole food history, your day totals, and the 23 vitamins and minerals
Every workout: starting a routine, logging sets, the rest timer, saving it
All 306 exercises and 125 stretches, with their instructions and charts
Your supplement list, doses, and vial counts
Water, bodyweight, check-ins, targets, and your history
Apple Health syncing, which happens on the device

Needs a connection

The three AI features: describing a meal, reading a label, checking a claim
Scanning a barcode, which looks the product up in a public food database
Searching the research literature, including the search behind a claim check

These need a connection because the answer is not on your phone. Everything else is.

If the connection drops

Nothing is lost. A workout in progress is stored on the device as you go, so losing signal in a basement gym, on a plane, or on a trail does nothing to it. Food you have logged is already saved. There is no sync to fail, no upload to retry, and no queue to lose, because nothing was going anywhere in the first place.

If an AI request fails, you are told, and you can still log the food by hand.

Your data is on the phone

There is no account and no server holding your log. That is why the app works offline at all, and it is the same reason your log is yours. The privacy receipt lists every network call the app can make and what each one sends.

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