Exposure RadarReadiness
How ready you are today
Blends your immune readiness (60%) with how light your exposure has been over the past week (40%). One number to check each morning.
- 75–100Ready
- 60–74Mostly ready
- 45–59Take it easy
- 0–44Rest and recover
Exposure Radar for iPhone
Know how much contagious illness you’re around, and how ready your body is.
Exposure Radar estimates your exposure from the places you go, how crowded they are and what local wastewater shows is spreading. It compares your Apple Health vitals with your own baseline. Then it helps you plan for the events you want to be well for.
1-week free trial, then $39.99 a year. Demo mode is free.
Today
Sample
66ReadinessMostly ready
52
Exposure7-day, high
78
Immune readinessAt baseline
Three scores
Three numbers, each out of 100
They share one color scale, from green to red, and none of them is a black box. See exactly how each one is calculated.
Exposure
How much contagious illness you’re around
Each day gets an exposure index from where you spent time, what kind of place it was, how crowded it was, what’s spreading locally and how dry the air was. Your 7-day exposure weights recent days most.
- 0–24Low
- 25–49Moderate
- 50–74High
- 75–100Very high
Immune readiness
How your body is doing, compared with your usual
Compares seven Apple Health signals, such as resting heart rate, heart rate variability and sleeping wrist temperature, with your own baseline. 75 means you’re at your usual. If several core signals shift at once, you get a strain signal.
- 80–100Above baseline
- 65–79At baseline
- 50–64Mild strain
- 0–49Elevated strain
Plan ahead
Be well for the days that matter
Pick the trips and gatherings on your calendar that you don’t want to miss. For each one, the app sets a low-exposure window before it: 5 days by default, or anywhere from 2 to 14. The goal is to keep each day’s exposure index under 30.
- A reminder on the morning your window starts.
- A reminder two weeks before, in case you’re due for a flu or COVID shot.
- Wastewater levels where you’re going, so you know what’s spreading there.
- Your calendar is only read, never changed. Details are kept only for the events you pick.
Low-exposure window
Sample: daily exposure index before Sam’s birthday party
Family & Friends
Look out for each other
Share your daily scores with the people you choose, so they can tell when you’re run down. If they share with you, you can see how they’re doing too. People you share with don’t need a subscription.
What they see
- Your readiness, 7-day exposure and immune readiness
- The last 30 days of those scores
- A status word and a short headline
- Whether you have a strain signal
- The display name you choose
What they never see
- The places you go
- Your raw Health data, such as heart rate, temperature or sleep
End-to-end encrypted. Your iPhone encrypts what you share before it’s sent. The key is only in your invite link, so the relay that passes your scores along can’t read them, and neither can the developer. Anyone with the link can see your scores, so send it only to people you choose. You can stop sharing at any time, and old links stop working.
Your data
How your data is handled
The short version. The policies below have every detail.
No account
There’s no sign-up and nothing to log in to.
No ads, analytics or tracking
The app has no ads and no analytics, crash-reporting or other third-party code. Nothing is sold.
Stored on your iPhone
Your places, the Health data the app reads, the events you plan and your scores are kept in the app’s private storage on your iPhone.
A few lookups leave the phone
Place coordinates go to Apple Maps to find the type of place. A location rounded to about 1 km goes to Apple Weather and the FCC for weather and county. A county or state code goes to the CDC for wastewater data.
Sharing is encrypted
If you use Family & Friends, your scores are encrypted on your iPhone. The developer’s relay stores only data it can’t read.
Delete everything at once
Settings → Delete all data clears the app’s data from your iPhone and deletes anything you’ve shared from the relay.
Pricing
Try it free for a week
$39.99 / year
after a 1-week free trial
On your Home Screen, the app is called Exposure.
- The free trial is for eligible new subscribers.
- Priced in U.S. dollars. Elsewhere you pay the local equivalent shown in the App Store.
- Renews each year unless you cancel at least 24 hours before it renews, in Settings → your name → Subscriptions.
- Demo mode is free, so you can explore the app with sample data first.
- Seeing the scores someone shares with you is free.
Not a medical device
Exposure Radar gives estimates for personal awareness. It doesn’t diagnose, treat or prevent any illness, and it can’t tell you whether you’re infected. A strain signal isn’t a diagnosis, and a low exposure score doesn’t mean you won’t get sick. If you feel unwell, talk to a clinician. In an emergency, call 911.