A journal that looks back for you.

Plume is a health journal for iPhone: you say, type or photograph what you ate and how you slept and felt, and after about a week it starts telling you patterns from your own days.

Coming soon — join the TestFlight

Free during the beta. iPhone (iOS 17 or later). No forms, no calorie counting.

The stage on Plume’s Today screen: a bowl of food, an egg, a cup of coffee, a running shoe, a supplement capsule and a small cloud, with the caption “6 things today”. — One day in Plume. Six things someone mentioned, each shown as an object.

How does Plume work?

Step 1

Say it

Tell Plume one thing about today, in any words: “Oat latte and two eggs.” “Slept badly, woke up at 4.” Type it, hold to talk, or take a photo.

There are no forms, no categories to pick and nothing to look up. English, Chinese, or both in one sentence.

Plume’s first screen: “Tell Plume one thing about today. Any words. Plume works out the rest.” with three example entries and a bar to write, photograph or talk.

Step 2

It lands

Plume reads the entry and answers with what it understood. Each thing you mentioned drops onto the day as an object you can tap.

Anything Plume estimated is labelled as an estimate, and you can correct it.

An entry written in Chinese, Plume’s reply “Got it: a protein shake, beef with cabbage and a bite of rice, about 7 hours of sleep”, and three objects on the stage: a bed, an egg and a bowl.

Step 3

It looks back

After about a week, Plume starts telling you patterns from your own days, such as “Big dinners follow skipped lunches.” Each one says how many days it rests on and how sure Plume is. A correlation is called a correlation.

If you want to test one, Plume sets up a small experiment, usually about a week long, checks it off from what you already log, and shows you what happened. You can also ask your journal questions.

A Plume screen titled “Then Plume looks back for you”, with an example finding, “Big dinners follow skipped lunches”, and three points: it finds things like this, it tests them with you, it answers questions.

What is Plume not?

Not a calorie counter. You never search a food database or enter a number. There are no daily targets, streaks or grades. Plume keeps rough estimates in the background and labels them as estimates.
Not a medical device. Plume is a wellness journal. It does not give medical advice, name conditions or suggest changes to medication. For those questions it points you to a doctor or pharmacist.
Not a form. No required fields and no daily checklist. One sentence is a complete entry.
Not an ad business. No ads, and your data is not sold.

Where does your data go?

Nothing leaves your iPhone until you agree to it in the app.
After that, your entries, photos and audio are read by OpenAI’s models so Plume can understand them. They are not used to train models; OpenAI may keep them for up to 30 days to prevent abuse.
Plume is hosted on Cloudflare, and a sign-in email, if you ask for one, is sent through Resend.
No ads, no sale of data, and no third-party analytics SDK in the app. You can export or delete everything in Settings.

The details are in the Privacy Policy and the Consumer Health Data Privacy Policy.

Tell Plume one thing about today.

Coming soon — join the TestFlight

Wondering how Plume differs from a calorie counter, a symptom tracker or Apple Health? See the comparisons.