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A calm, private place to look after yourself.
Enjoy your night, and wake up glad you looked after yourself. ChillMate keeps track of what you took and how you felt, tells you what mixes badly, and can quietly let a friend know you got home. All private. All free.
Free on the App Store, for iPhone and Apple Watch. No account, and nothing to set up: open it and it works.
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Who it’s for
Made for the nights other apps skip
Chems, hookups, or both. ChillMate takes the night as it was. It won’t ask you to explain it.
The app calls a night a Chill. Yours is yours, whatever it turned into.
- A risk checker that already knows the medication you’re on, so the answer fits you.
- A check-in timer, so a friend knows you got home without you having to text.
- A countdown for PEP, the medicine you take after a possible HIV exposure. It only works if you start fast, and this starts counting straight away.
- Test reminders that turn up on time and never say why on your lock screen.
A look inside
Five screens, and what each one does for you.
It sorts itself out
The thing you need, already at the top
Log a night and the home screen rearranges itself around it. Here it has worked out that a PEP conversation might be worth having, so it put that countdown right at the top.
Straight answers
What’s known, in plain words
Pick what’s in play, including your own medication. It tells you what’s on record about that mix, in words you can read at 4am. The choice stays yours.
When it’s already hard
One calm thing at a time
Dim screen, nothing flashing, one step at a time. Breathe, work through the grounding steps, and call someone the moment you want to.
Real help, offline
People, one tap away
Crisis lines, sexual health, drug information and LGBTQ+ support for your country. The list sits on your phone, so it still works with no signal.
Your data, on one screen
In the app, not in the small print
What’s on your phone, what a backup would hold, and what ChillMate never sends. One screen shows you all of it. No legal text to wade through.
Try it
This is the real risk checker.
Not a picture of it. The same 30 combinations and the same words as the app, running right here. Nothing to install.
Pick what’s in play
Anything you already take
How close together
The risk checker won’t call anything safe. Neither will the summaries. Nowhere in the app will you be told something is fine. You get what’s on record, in plain words, and you decide.
Private by design
Your phone, and nowhere else
Nothing you write here goes anywhere. Not to me, not to a company, not to an advertiser. It stays on your phone.
- Lock it with Face ID or a PIN. Everything on the phone is encrypted, which means it is unreadable to anyone without your key.
- Backups are optional and encrypted too, and they go to your own iCloud Drive.
- Notifications can be worded so your lock screen gives nothing away.
Where your data goes
The details
Specifications
| Requires | iPhone with iOS 26 or later |
|---|---|
| Apple Watch | Its own app, watchOS 26 or later |
| Price | Free. No paid version, no subscription, no ads. You can donate if you want to, which unlocks nothing. |
| Account | None. There’s nothing to sign up for. |
| Data collected | None |
| Languages | English, Nederlands, Deutsch, Français, Español |
| Help services | 10 regions, kept on the phone, works offline |
| Combinations checked | 30 known interactions, on the phone |
| Written summaries | On the phone, Apple Foundation Models |
| Sync and backup | Optional, encrypted, your own iCloud |
| Lock | Face ID, or a PIN protected by 200,000 PBKDF2 rounds |
| Source | Open, MIT licensed |
| Version | 4.2.1 (build 422) |
One last thing
It’s free, and it stays free.
Every feature is there from the first launch, with no account to make and nothing to unlock. And if you would rather not install anything, the risk checker above works right now, and every number on the help page works with no signal.
ChillMate helps you think things through, plan ahead and look after yourself. It doesn't replace a doctor, and it never decides whether something is safe. If someone might be in immediate danger, call your local emergency number.