Comparison

Zenith Breath vs Sloow

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

Head to head
About

Zenith Breath

Features
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**Master the Lost Art of Breathing** Breathwork brings ancient wisdom and modern science together in a beautifully designed app that teaches you how to breathe properlyβ€”something most of us have forgotten. Based on the groundbreaking research in James Nestor's bestselling book "Breath: The New Science of a Lost Art," this app guides you through 11 scientifically-supported breathing techniques that can transform your health, performance, and well-being. **WHY BREATHING MATTERS** Most people breathe incorrectly without realizing it. Poor breathing habits contribute to anxiety, poor sleep, decreased athletic performance, and numerous health issues. The good news? You can retrain your breath in minutes a day. **11 POWERFUL TECHNIQUES** **For Beginners:** β€’ Nasal Breathing - The foundation of healthy breathing β€’ Slow Breathing - Optimize heart rate variability at 5.5 breaths/min β€’ Box Breathing - Navy SEAL technique for instant calm β€’ 4-7-8 Breathing - Fall asleep in minutes β€’ Extended Exhale - Deep sleep inducer β€’ Resonant Breathing - Heart-brain coherence **For Performance:** β€’ Buteyko Method - Improve CO2 tolerance and reduce asthma β€’ CO2 Tolerance Training - Boost athletic endurance β€’ Tummo - Ancient Tibetan "inner fire" technique **For Focus & Balance:** β€’ Alternate Nostril Breathing - Balance your nervous system β€’ Chewing Practice - Strengthen facial structure **BEAUTIFUL, CALMING DESIGN** β€’ Three stunning animation styles: Breathing Orb, Wave, and Progress Ring β€’ Soothing color schemes with nature-inspired gradients β€’ Customizable themes and backgrounds **PERSONALIZE YOUR PRACTICE** β€’ Adjust breath ratios to match your comfort level β€’ Choose from multiple voice guidance options β€’ Optional haptic feedback for each breath phase β€’ Set custom session durations (1-60 minutes) β€’ Daily reminders to maintain your practice **TRACK YOUR PROGRESS** β€’ Monitor completed sessions and total breath cycles β€’ View daily, weekly, and monthly statistics β€’ Identify your most-used techniques β€’ Track your longest sessions β€’ Build consistency streaks **LEARN THE SCIENCE** Each technique includes comprehensive educational content: β€’ Scientific explanation of how it works β€’ Evidence-based health benefits β€’ Practical tips for optimal results β€’ Historical context and sources **FEATURES AT A GLANCE** β€’ 11 breathing techniques across 4 categories β€’ Beautiful animations that guide every breath β€’ Audio and haptic feedback options β€’ Customizable breath ratios and durations β€’ Detailed progress tracking and statistics β€’ In-depth educational content β€’ Daily practice reminders β€’ Works offline - no internet required β€’ No subscription required β€’ Privacy-focused - your data stays on your device **WHO IS THIS FOR?** β€’ Anyone seeking stress relief and better mental health β€’ Athletes looking to improve performance and recovery β€’ People struggling with sleep issues β€’ Those with anxiety or panic disorders β€’ Meditation practitioners wanting to deepen their practice β€’ Anyone interested in optimizing their health naturally **BASED ON SCIENCE** All techniques are backed by scientific research and traditional practices spanning centuriesβ€”from Tibetan Buddhist monks to Navy SEALs, from ancient yogis to modern sleep researchers. We cite our sources so you can learn more. Transform your health one breath at a time. Download Zenith Breath today.

About

Sloow

Features
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Sloow guides you toward a state of calm through passive audio sessions, grounded in cardiac resonance science. 20-DAY PROGRAM A two-phase journey β€” 10 days, then 10 days at a different resonance frequency. Each session is 20 minutes: sit down, listen, let relaxation settle in naturally. HRV MEASUREMENT β€’ With the Kyto 2936 Bluetooth sensor (or any HRS-compatible sensor): continuous in-session capture (2-min baseline + 20-min audio + 2-min recovery), automatic background reconnect. β€’ Without a sensor: 5-minute finger PPG measurement using the camera (bookend on sessions 1, 10, 20). Indicators: RMSSD, SDNN, heart rate, signal quality β€” all explained in plain language, tappable for clarity. PROGRESS MAP See your 20 days at a glance, browse session history, get a reminder for the next one. READING CARDS A curated selection of texts β€” Jung, Erickson, Frankl, Marcus Aurelius β€” to read or skip, at your pace. PRIVACY No health data is shared without your explicit consent. Your measurements stay yours. Sloow is a wellness application. It is not a medical device and does not provide diagnosis, treatment, or prevention of disease. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Zenith Breath4 screens
Sloow4 screens

Verdict

The call

The clearest difference is in-app purchases: Zenith Breath at none against Sloow's 5. Sloow's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Sloow sells 5 in-app purchases, starting at $0.99 per month. Zenith Breath asks for nothing beyond the download.

UpkeepUpdate frequency

Zenith Breath ships an update every 6 weeks, Sloow every 3 weeks. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.

Scorecard2 real differences Β· 4 level
Zenith Breath versus Sloow: the parameters behind the verdict, then further details
ParameterZenith BreathSloow
PriceFreeFree
Update frequencyEvery 6 weeksEvery 3 weeks β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS17.016.0 β€” better
Further details β€” not scored
Size18 MB64 MB
Age rating4+4+
DeveloperRadu ZubascuKevin Duchier

In-app purchases

None

Zenith Breath

No in-app purchases

5 purchases

Sloow

Subscriptions5
  • Sloow Free$0.991 Month
  • Sloow Encouragement$2.991 Month
  • Sloow Beta$3.991 Month
Show 2 more
  • Sloow Support$8.991 Month
  • Sloow Full price$17.991 Month

Questions

Is Zenith Breath free?
Zenith Breath is free to download, with no in-app purchases.
Is Sloow free?
Sloow is free to download, with in-app purchases available.
Do Zenith Breath or Sloow have ads?
Neither Zenith Breath nor Sloow shows ads.
Which is updated more often, Zenith Breath or Sloow?
Zenith Breath ships an update every 6 weeks, and Sloow every 3 weeks. Most recently, Zenith Breath was updated on October 25, 2026 and Sloow on October 14, 2026.

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