Session 1 of 3
24:12until break
Next event: Planning, 10:30
Focus by day.Sleep by night.
Halcyon is a focus timer and a sleep-sound player in one app. During the day it runs 25-minute sessions and keeps distracting apps closed. At night it plays rain or a sleeper train, lowers the volume gradually, and stops once you’re asleep.
The free plan needs no account and never expires.
Session 2 of 3
18:24until break
Next: Planning at 10:30
A day with Halcyon
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9:00 AM
First session
Your calendar has ninety minutes free before the 10:30 meeting. Halcyon suggests three 25-minute sessions with five-minute breaks. The screen shows the ring and the time left.
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11:20 AM
App blocking
While a session runs, the apps on your list won’t open. If you really need one, you can open it for five minutes — once a day, after typing a reason.
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6:30 PM
Weekly summary
Focus minutes for each day, finished sessions, and the day you skip most often. No streaks or badges: if the week was lighter, the chart simply shows it.
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10:30 PM
Wind-down
The app switches to its dark theme, sound starts at 40% volume, and the sleep timer is set to 45 minutes. Over the last ten minutes the recording fades out. Your alarm rings as usual.
Session in progress
These apps are paused until 11:45
- TikTok
- YouTube
1 override left today. A reason is required.
This week
12h 40m
+18% vs last week31 of 34 sessions finished
Lightest day: Wednesday
Rain on a Tin Roof
Galway, recorded at 3:12 AM
7:40Fade: last 10 min45:00
Sounds recorded in real places
Each of the 38 recordings was made on location with a portable recorder; nothing in the library is synthesized. The shortest loop runs four minutes, so you never hear it repeat. Download any of them to play offline.
- 45 minDownloaded
- 60 minDownloaded
- 40 min
- 30 min
- 90 min
- 75 min
6:40 AM
If a recording is still playing, Halcyon fades it out ninety seconds before your alarm, so the alarm goes off in a quiet room.
What else Halcyon does
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Works offline
The timer, app blocking, and downloaded recordings all work in airplane mode. Stats sync as soon as you’re back online.
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Widgets
Start a session from your Home Screen or Lock Screen without opening the app.
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Apple Watch and Wear OS
Start, pause, and end sessions from your wrist. The watch taps you once at the halfway mark.
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Shared rooms
Focus alongside up to five colleagues. You see who’s in the room and how long each person has left. There’s no chat.
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Apple Health and Health Connect
If you choose, Halcyon logs sleep sessions to Health on iPhone or Health Connect on Android. Off by default.
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Privacy
Sessions stay on your phone. There are no ad or analytics SDKs in the app, which is why it’s only 41 MB.
Ratings and reviews
4.9out of 5
21,400 ratings
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Finally finished my thesis
jen.writes · Sep 12, 2026
Three sessions every morning with Instagram and Slack blocked. I wrote two chapters in a month that I’d been putting off since spring.
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The sleeper train recording
Megan K. · Oct 3, 2026
The sleeper train is my favorite. I’m asleep in about ten minutes, and since it shuts itself off, my phone isn’t dead in the morning.
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Wish the free plan had longer sessions
dpark · Sep 27, 2026
Timer and sounds are great. The free plan only has 25 and 50 minutes, and I work in 90-minute blocks, so I went with Plus annual.
Developer responseThanks for the review! Custom lengths are part of Plus, but we’ve passed your request on to the team.
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Works with no signal
Andrew · Aug 18, 2026
My commuter train loses signal for half the ride. Downloaded recordings and the timer keep working without a connection.
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Honest stats
Laura M. · Oct 9, 2026
The weekly chart showed I barely focus on Wednesdays — that’s my meeting day. I moved half of those meetings to Friday.
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Great with the watch
Chris T. · Sep 30, 2026
I start sessions from my Apple Watch and leave the phone in another room. The single tap at the halfway mark is just right.
Pricing
The free plan covers everyday focus work. Plus unlocks every recording and app blocking.
Free
$0forever
- 25 and 50-minute timers
- 6 recordings
- Weekly summary
- 3 offline downloads
- No account needed
Plus
7-day free trial$6.99per month
$49per year · ≈ $4.08 a month
- All 38 recordings
- App blocking
- Calendar-aware sessions
- Any session length
- Unlimited offline downloads
- Widgets and watch app
- Shared rooms and CSV export
Prices in USD; sales tax may apply. Subscriptions renew automatically. Cancel in App Store or Google Play settings at least 24 hours before the period ends.
Questions
- Do I need an account?
- No. The free plan works without one. You only need an account to move Plus to another device, and you can create it at any time without losing your session history.
- How does app blocking work?
- On iPhone, Halcyon uses Apple’s Screen Time framework; on Android, a permission the system asks for during setup. Your block list never leaves the phone.
- Does it work offline?
- Yes. The timer, app blocking, and downloaded recordings all work offline. You only need a connection to download new recordings and sync stats between devices.
- Will the sleep player interfere with my alarm?
- No. The player follows the system’s audio rules, so your alarm rings at the volume you set.
- How do I cancel Plus?
- In your App Store or Google Play subscription settings. Plus stays active until the end of the paid period, then the app switches to the free plan and keeps your sessions and stats.
- What happens to my data?
- Sessions are stored on your phone and only reach our servers if you turn on sync. There are no ad or analytics SDKs in the app.
Start with one session
Setup takes about a minute. The free plan never expires and needs no account.
Reading on a computer?
We’ll send you a link to the app so you can open it on your phone when it suits you.
Thank you. This is a demonstration site: the request is not sent to a real company.
This is a demo: the form works, but the Halcyon app doesn’t exist.