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Version
2.0.3
Size
4.3 Mb
Updated
1 week ago
Released
09 Mar 2018
Screenshots
Description
zzZ is a calm, ambient breathing light for the end of the day. No account. No subscription. No notifications. Place your iPhone or iPad on the nightstand, follow the glow, and let your breath slow to the rhythm that research has linked to better sleep.
THE METHOD
Slow-paced breathing at around six cycles per minute — a rate known as "resonance breathing" — is associated in published studies with reduced sleep-onset latency, fewer nighttime awakenings, and greater parasympathetic (rest-and-digest) activity (Laborde et al., 2022; Hamasaki, 2020). A longer exhale than inhale is linked to increased vagal tone and heart-rate variability (Laborde et al., 2024; Jerath et al., 2006).
zzZ starts at a comfortable pace (around ten breaths per minute) and gently eases you down to roughly six over two to three minutes — the same descent pattern used in heart-rate-variability biofeedback protocols. You simply follow the breathing orb, or close your eyes and feel the gentle haptic swell on each inhale and exhale.
DESIGNED FOR THE NIGHTSTAND
- Eyes-closed mode — a gentle haptic pulse marks every inhale and exhale, so you can put the phone face-down and let the rhythm do the rest
- Full-screen breath orb — no menus, no chrome, no ads
- Melatonin-friendly Red Night theme (plus Warm Amber, Moonglow, Aurora)
- Optional ambient bed (pink noise, brown noise, soft rain, or silent)
- Optional breath chime cues
- Works beautifully on iPad in landscape — a true bedside breathing lamp
PRESETS
- Sleep Descent — guided 10 → 6 BPM wind-down (default)
- Deep Resonance — steady 5.5 BPM, vagal activation
- 4-7-8 — the Weil technique
- Box — even four-count for calm focus
PRIVACY BY DESIGN
zzZ collects no data. No accounts, no tracking, no analytics, no network requests. Completed sessions can optionally be written to Apple Health as Mindful Minutes — all other data stays on your device.
ACCESSIBILITY
Supports Dynamic Type, VoiceOver labels on controls, and Reduce Motion.
WORKS WITH
- Apple Health — Mindful Minutes
- Siri & Shortcuts — "Hey Siri, start wind-down"
- Sleep Focus — run zzZ automatically as part of your wind-down routine
SELECTED REFERENCES
Laborde S. et al. (2022) Psychophysiological effects of slow-paced breathing at six cycles per minute. Psychophysiology.
Hamasaki H. (2020) Effects of diaphragmatic breathing on health: a narrative review. Medicines.
Jerath R. et al. (2006) Physiology of long pranayamic breathing. Medical Hypotheses.
Lehrer P. & Gevirtz R. (2014) Heart rate variability biofeedback. Frontiers in Psychology.
zzZ is a wellness tool and does not diagnose, treat, or cure any medical condition. If you suffer from chronic insomnia, please consult a sleep specialist.
Estimates
Search Keywords 1
| # | Term | Country | Place | Priority |
|---|---|---|---|---|
| 1 | sleep app zzz | #8 |
Competitors
Availability
Devices
iPhone5
iPadFourthGen
iPadFourthGen4G
iPhone5c
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iPhone11
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iPhone13Pro
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Pricing by country
| Country | Price |
|---|---|
| Canada | 11.99 CAD |
| China | 58 CNY |
| France | 9.99 EUR |
| Germany | 9.99 EUR |
| Italy | 9.99 EUR |
| Netherlands | 9.99 EUR |
| Portugal | 9.99 EUR |
| Spain | 9.99 EUR |
| UK | 8.99 GBP |
| India | 999 INR |
| Japan | 1500 JPY |
| Korea, Republic Of | 15000 KRW |
| Poland | 39.99 PLN |
| Russia | 799 RUB |
| Turkey | 499.99 TRY |
| USA | 8.99 USD |
| Korea, Republic Of | 2.19 USD |
| Ukraine | 9.99 USD |
Version History
Latest: 2.0.3
Small refinements and stability fixes.
• The app now displays "Wind Down" on your home screen, matching the App Store name
• Polish across in-app wording
Price changed to $1.99
v1.1.4
1 week ago
