Comparison

Nap Buddy Timer vs Physiological Sigh

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Nap Buddy Timer

Features
Read full description

[napTimer - Power Nap Timer] Enjoy the perfect nap with cute animal friends. ■ Features • Cute animal characters Watch ads to unlock new adorable companions. • 5 types of soothing BGM Forest sounds, river sounds, ocean waves, rain sounds, and cafe jazz. • Fully customizable timer Includes a 26-minute preset, perfect for power naps. • Background playback supported BGM continues even when the screen is turned off. • Earphone compatible The alarm plays through earphones, so you won’t disturb people around you. ■ Recommended for people who want to: • Beat afternoon sleepiness • Refresh in a short amount of time • Take naps during commutes • Relax with comfortable background music • Be healed by cute animals ■ Free to use

About

Physiological Sigh

This app guides you through a scientifically proven breathing technique to quickly calm your nervous system and reduce stress. It requires no prior meditation experience and offers customizable durations and ambient sounds for a personalized experience.

Highlights
  • Guided breathing exercises
  • Customizable phase durations
  • Ambient sound library
  • Daily reminder notifications
  • Distraction-free interface
  • Haptic feedback
Features
Read full description

Calm your nervous system in seconds. Physiological Sigh is a science-backed breathing app built around the fastest stress-relief technique ever studied. No meditation experience required. No complicated programs. Just three simple phases, and you'll feel the difference in under 30 seconds. WHAT IS THE PHYSIOLOGICAL SIGH? The physiological sigh is a natural reflex your body already performs — spontaneously, during deep sleep — to re-oxygenate your lungs and reset your nervous system. Stanford neuroscientist Andrew Huberman and his team discovered that triggering this reflex voluntarily is the single most effective real-time tool for reducing stress and anxiety. It works in one cycle. It works anywhere. And it works immediately. HOW IT WORKS Each cycle consists of three phases: A short inhale through the nose A second, longer inhale through the nose to fully inflate your lungs A long, slow exhale through the mouth That's it. One cycle takes less than 9 seconds. A full 5-minute session delivers lasting effects on your heart rate, cortisol levels, and overall sense of calm. WHY THIS APP Most breathing apps ask you to follow complex programs or sit through lengthy guided sessions before you feel anything. This app does one thing, and does it exceptionally well. We built it around the physiological sigh specifically because the science is clear: of all real-time stress-reduction techniques studied, this one produces the fastest and most measurable results. No guesswork, no filler. FEATURES Animated breathing disc that guides you through each phase in real time Phase card showing exactly where you are in the cycle Elapsed and remaining time counter Customizable phase durations — adjust each inhale and exhale to your comfort Session length from 1 to 30 minutes Ambient sound library — rain, ocean waves, fireplace, white noise, singing bowls, and more Custom backgrounds — choose the atmosphere that helps you focus Haptic feedback with a distinct pattern for each phase Daily reminder notifications — up to 3 scheduled reminders per day Clean, distraction-free interface designed for daily use BACKED BY SCIENCE The physiological sigh has been studied since the 1930s and brought into mainstream wellness by researchers at Stanford University. A 2023 study published in Cell Reports Medicine found that cyclic sighing practiced for 5 minutes daily produced greater improvements in mood and reductions in stress than other breathing techniques and mindfulness meditation. This app puts that research directly in your hands. PERFECT FOR Moments of acute stress or anxiety Pre-meeting nerves or public speaking Winding down before sleep Resetting after an intense workout Building a daily mindfulness habit without the time commitment SIMPLE BY DESIGN Open the app. Press play. Breathe. That's the entire experience. No account required to get started, no onboarding questionnaire, no streak pressure. Just a tool that works when you need it. Start your first session today. Your nervous system will thank you. Physiological Sigh is not a medical device and is not intended to diagnose, treat, or prevent any medical condition. If you experience anxiety disorders or other health conditions, please consult a qualified healthcare professional. - Terms Of Use : https://occirama.com/physiological-sigh/terms-of-use/ - Privacy Policy : https://occirama.com/physiological-sigh/privacy/

Screenshots

Nap Buddy Timer4 screens
Physiological Sigh4 screens

Verdict

The call

The clearest difference is in-app purchases: Nap Buddy Timer at none against Physiological Sigh's 2. Nap Buddy Timer also leads on iOS requirement (15.0 vs 26.2). Physiological Sigh's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Physiological Sigh sells 2 in-app purchases, starting at $2.99 per month. Nap Buddy Timer asks for nothing beyond the download.

UpkeepUpdate frequency

Nap Buddy Timer ships an update every 4 days, Physiological Sigh every 3 days. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 7 level
Nap Buddy Timer versus Physiological Sigh: the parameters behind the verdict, then further details
ParameterNap Buddy TimerPhysiological Sigh
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 4 daysEvery 3 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.2
Further details — not scored
Size22 MB43 MB
Age rating4+17+
Developeriida atsushiemmanuel orvain

In-app purchases

None

Nap Buddy Timer

No in-app purchases

2 purchases

Physiological Sigh

Subscriptions2
  • Premium Account / Month$2.991 Month
  • Premium Account / Year$9.991 Year

Questions

Is Nap Buddy Timer free?
Nap Buddy Timer is free to download, with no in-app purchases.
Is Physiological Sigh free?
Physiological Sigh is free to download, with in-app purchases available.
Do Nap Buddy Timer or Physiological Sigh have ads?
Nap Buddy Timer shows ads; Physiological Sigh does not.
Which is updated more often, Nap Buddy Timer or Physiological Sigh?
Nap Buddy Timer ships an update every 4 days, and Physiological Sigh every 3 days. Most recently, Nap Buddy Timer was updated on October 10, 2026 and Physiological Sigh on October 11, 2026.

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