On-device · No wearable · No account

Sleep tracking that needs nothing but the phone on your nightstand.

DriftSleep listens for snores and reads your motion, all on-device. Wake up to a sleep score, a snore timeline, and one coaching tip from your night — no watch, no ring, no audio recordings.

Download on the App Store See how it works
No microphone recordings 14-day free trial Cancel anytime
Snores
3 tonight
Sleep score
82 +6
9:41

Good evening, Alex

Thursday, May 15
Next schedule in
8h 51m
Bedtime · 10:30 PM
z z
11Sun
12Mon
13Tue
14Wed
15Thu
16Fri
AI coaching tip
From last night
Try winding down 15 minutes earlier — your snores clustered after a late 11:30 PM sleep onset.
23:14
Start
06:38
Wake up
00:09
Fell asleep
3
Snores
Start tonight's tracking
0
Audio files recorded. Snore analysis runs in real time on-device.
7 nights
Of trend history at a glance.
$6.99
Per month, or $49.99/year. 14-day free trial.
No wearable
Your iPhone's mic and motion sensors do the whole job.
How it works

Four steps, then you sleep.

No watch to charge, no chest strap, no account to sign up for. Just place your phone face-down on the nightstand and tap one button.

1

Place your phone on the nightstand

Screen down, within an arm's reach of your head, ideally plugged in.

2

Tap start before bed

One tap arms tracking. The screen dims to navy and gets out of your way.

3

Mic + motion do the rest

On-device snore detection and accelerometer-based restlessness. No audio is ever recorded.

4

Wake to your report

Sleep score, snore timeline, restlessness readout, and (with Pro) one specific coaching tip from your night.

Not a medical device. DriftSleep is for personal awareness, not diagnosis. If you suspect sleep apnea or another condition, please see a clinician.
Four screens. That's the whole app.

Calm, dark, and out of your way at 2 AM.

DriftSleep is designed for the worst lighting condition any app will ever face — the moment you reach over to check the time. No bright whites, no surprise modals, no flashing badges.

9:41
DriftSleep app icon

DriftSleep

Sleep tracking that needs nothing but the phone on your nightstand.
Track your nights
without a wearable
No watch, no ring, no account.
Get started
01 — WELCOME

One screen, no onboarding maze

Three quick permissions, then a single big button. No accounts, no email capture.

2:14
Do Not Disturb is on OK
Listening for snores
On-device · Updates every 10 min
2:14
Asleep
1
Snores
0
Restless
Hold to stop tracking
02 — TRACKING

A gentle pulse, nothing else

Screen dims to navy. No bright UI to interrupt the room if you check the time.

7:23
Home Sleep Stats .
Last night
7h 23m
Longer than usual
z z
7h 23m
Total
3
Snores
2
Restless
82
Score
Snore timeline
3 episodes
11 PM1 AM3 AM5 AM7 AM
03 — REPORT

The numbers that matter, that's it

Total sleep time, snore count, restlessness, and a 0–100 score — plus a snore timeline. No 20-page novel.

9:41
History
May 9 – 15
7 nights · avg score 75
Weekly +6 vs last
82
Thu · May 15
7h 23m · 3 snores
75
Wed · May 14
6h 53m · 5 snores
78
Tue · May 13
7h 12m · 2 snores
65
Mon · May 12
6h 24m · 9 snores
04 — HISTORY

7 nights of patterns at a glance

One ring per night, color-coded. Tap any night to revisit its report.

Private by design

Your bedroom never leaves the room.

DriftSleep is one of the only sleep apps where audio analysis runs entirely on your device. The microphone buffer is classified in real time and immediately discarded — no waveform is written to disk, no audio is ever uploaded, and the only thing that syncs is a summary of your night (duration, snore count, restlessness, score).

No audio leaves your phone

The mic buffer is analyzed in real time by on-device sound classification, then immediately discarded. Only the timestamp and duration of detected snore episodes are saved — never the sound.

Anonymous by default

No email, no signup, no password. Each install gets an anonymous ID stored in your iOS Keychain. We can't link your nights to a person — not even to you, by name.

Your sleep summary syncs, your audio doesn't

Sleep summaries sync to our secure servers so your history persists across reinstalls. Audio and raw motion data stay on-device, full stop.

Zero ad SDKs, zero tracking

No Facebook SDK, no Mixpanel, no Amplitude, no AppsFlyer, no IDFA prompt. Crash reports are PII-scrubbed and never contain sleep data or microphone buffers.

Built around the things big sleep apps still don't get right.

Most popular sleep apps upload audio "snippets" to their cloud for "analysis." DriftSleep doesn't. Period. The App Store reviewer can verify this claim on every build by checking that no audio buffer ever crosses the network layer.

Read the full privacy policy if you want every detail. It's plain English and short.

0
SDKs that track you
100%
On-device audio classification
0
Audio bytes uploaded
1
Place your nights live — summarized, anonymized, in your account
Inside DriftSleep

Small app, sharp tools.

Seven features. Each one earned its place. No carousel of half-baked add-ons.

01 · Daily

Nightly sleep score

A single 0–100 score from total time, snore load, restlessness, and consistency. Designed to be checked in 3 seconds before coffee.

82
/ 100
+6 vs your 7-night avg
Solid night
Most of the gain came from fewer restless periods and an unusually low snore load.
Last 7 nights Avg 75 · trend ↗
02 · Audio

Snore timeline

See exactly when episodes happened across the night — onset, middle-of-night clusters, early-morning bursts — so you can change one thing tomorrow.

11p1a3a5a7a
4
Episodes
18 s
Avg length
Loudest at 1:42 AM — clustered in the middle of the night.
03 · Coaching

One tip per night PRO

Not a feed. Not a course. One pattern we noticed last night and one thing to try tonight. Generated for your data, not a generic library.

From last night
"Try winding down 15 minutes earlier — your snores clustered after a late 11:30 PM sleep onset."
04 · Motion

Restlessness, minute by minute

Movement derived from the accelerometer. Spot the nights you tossed and turned, and the conditions that caused them.

11p3a7a
05 · Alarm

Smart wake window PRO

Pick a wake-up window. DriftSleep nudges you awake at a calm, low-movement moment inside it, instead of jolting you out of nowhere.

Alarm window 6:30 – 7:00
calm-movement zone
Woken at 6:43 AM — calmest moment in the window
06 · History

7-night trends PRO

Weekly sleep score, snore counts, and restlessness side by side. Spot the weekend shift, the back-to-Monday dip, the week your gym schedule paid off.

May 9 – 15 +6 vs last week
58
88
81
65
78
75
82
FSSMTWT
07 · Health

Apple Health integration OPTIONAL

Writes detected sleep sessions to HealthKit so your sleep history stays in one place across apps. Reads HRV (if you grant it) to sharpen the Pro coaching tip.

Apple Health
Sleep Analysis · 7h 23m logged
HRV (read-only)
42 ms · sharpens Pro tip
Per Apple HealthKit policy — never sold or shared
Pricing

Simple. Fair. No upsells in the middle of the night.

DriftSleep is sold through Apple's In-App Purchase. 14-day free trial, then $49.99/year or $6.99/month. Cancel any time from iOS Settings.

What's included

Every feature, from the first night.

  • Nightly sleep score (0–100)
  • Snore detection + snore timeline
  • Restlessness tracking
  • One AI coaching tip per night
  • Smart wake window
  • Full sleep history + 7-night trends
  • Optional Apple Health sync (HRV sharpens the tip)
SAVE 40%

DriftSleep Pro

14-day free trial · $49.99/year or $6.99/month.

$49.99
/ year
  • 14 days free, then $49.99/year
  • Or $6.99/month if you'd rather pay monthly
  • Every feature, no add-ons or upsells
  • Cancel any time in iOS Settings
Start 14-day free trial

Auto-renews at $49.99/year (or $6.99/month) unless canceled at least 24 hours before the period ends.
Manage in iOS Settings → [your name] → Subscriptions. Prices in USD; local currency may vary.

Frequently asked

The questions we hear most.

Does DriftSleep actually record audio?
No. The microphone buffer is analyzed in real time on your device and immediately discarded. No audio file is created, written to disk, or uploaded. Only the count, timestamp, and duration of detected snore events are saved — never the sound itself.
Do I need an Apple Watch or other wearable?
No. DriftSleep uses just your iPhone. Place it on the nightstand or mattress within reach of your head, plug it in, and tap Start. No watch, no ring, no chest strap, no smart mattress.
What exactly does DriftSleep measure?
Total time in bed, sleep duration, snore episodes (count + timeline), restlessness (from the accelerometer), and a 0–100 sleep score derived from those. Note: DriftSleep does not estimate REM / Deep / Light sleep stages — accelerometer-based stage estimation isn't reliable enough for us to put a number on it.
Will it drain my battery overnight?
DriftSleep is designed to run on a charging phone. The screen dims to near-black with no animation, audio classification runs continuously but cheaply, and motion reads in bursts. Plugged in, you'll wake to 100%.
Is DriftSleep a medical device?
No. It's for personal awareness, not diagnosis. If you snore heavily and feel tired during the day, or suspect sleep apnea, please see a clinician — DriftSleep can't replace a sleep study.
Can I sync across devices?
Your sleep summary history syncs to our servers so you keep your data when you reinstall. It's tied to an anonymous ID on your device — no account, no email.
How much does DriftSleep cost? Is there a free version?
DriftSleep is a subscription app — there's no separate free tier, but every install starts with a 14-day free trial with full access. After that it's $49.99/year (about $4.17/month) or $6.99/month. Cancel any time before the trial ends and you won't be charged a cent.
What happens when my free trial ends?
If you don't cancel, your subscription begins automatically at the price you picked ($49.99/year or $6.99/month) and DriftSleep keeps tracking your nights. If you cancel before day 14, access simply stops at the end of the trial — no charge, no hassle. Apple sends you a reminder before any trial converts.
How do I cancel Pro?
iOS Settings → [your name] → Subscriptions → DriftSleep → Cancel. Apple handles all billing and cancellations — we never see your payment details. You keep Pro through the end of your billed period.
Who builds DriftSleep?
DriftSleep is built by Blossomn, a small independent software studio. No ads, no investors pressuring us to harvest your data. Email info@blossomn.com — a real human answers.

Sleep better, starting tonight.

14 days free, then $49.99/yr. Your nights stay your business.

Download on the App Store See how it works

Requires iPhone with iOS 17 or later. Apple Health integration optional. Microphone and Motion permissions required for tracking.