RespiRelax+ vs OxyKnight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RespiRelax+
Improve your breathing and manage stress with guided exercises. This app offers personalized programs and offline functionality for consistent practice, promoting well-being and cardiac coherence.
- Personalized breathing programs
- Stress management exercises
- Cardiac coherence training
- Offline practice mode
- Adjustable session duration
- Soothing visual and sound environments
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Respirelax+, c'est 5 min de pratique pour 5h de bien être. Mieux respirer, mieux gérer son stress et travailler la cohérence cardiaque avec Respirelax+. L’évolution que nous vous proposons aujourd’hui intègre une facilité d’utilisation quelque soit votre niveau de pratique et permet d’aller encore plus loin grâce à un programme PERSONNALISER enrichi. Gratuite, efficace et simple d’utilisation même en mode «avion» ou «hors-ligne» grâce à une ergonomie très intuitive. Application, exercices, contenus et environnement sonore développés en collaboration avec Yves-Vincent DAVROUX, Respithérapeute, et référent respiration aux Thermes d’Allevard. Avec cette nouvelle version, il vous est désormais possible : - De gérer facilement la durée des sessions pour adapter votre pratique à vos séances au quotidien - De bénéficier d’un nouvel environnement visuel et sonore, apaisant et sobre en énergie - D’effectuer les réglages les plus adéquats en fonction de votre pratique et de vos attentes en sélectionnant le mode visuel et/ou sonore - De pratiquer les exercices hors connexion, n’importe où et de préférence en pleine nature - De pratiquer avec des écouteurs ou casque audio en mode sonore, pour vous recentrer sur votre pratique sans être dérangé par les environnements extérieurs - De coupler l’application à une enceinte nomade pour des séances collectives, en mode «avion» ou «hors-ligne», sans être dérangé par un appel Informations d’usage complémentaire : - Pour les débutants, commencez toujours par le mode DEBUTER - Encouragez une pratique régulière, au moins 1 fois par jour, pour en vérifier les effets - Préférez une fréquence des séances soutenable - Intégrez les exercices comme une philosophie de vie, de réconciliation avec soi, avec la nature - Ne jamais forcer - Si la tête tourne et si une gêne respiratoire survient, arrêtez la séance et reprenez une respiration naturelle - Favorisez une respiration ample, douce et calme avec le diaphragme - Avancez par étape et prenez le temps d’intégrer les programmes progressivement - Disponible sur Apple Store et Google Store Cette application a été développée par les Thermes d’Allevard (Isère-France), Pour aller plus loin : https://respirelax.eu Ambiance sonore : Studio AUDIOBLEND- Roubaix
OxyKnight
This app works with compatible smart oximeter devices to monitor and record overnight pulse oximetry. It provides detailed sleep reports with SpO2 and PR trends, customizable alarms, and spot-checking capabilities for oxygen saturation and respiration rate.
- Overnight HRPO monitoring
- Sleep reports with SpO2/PR trends
- Customizable SpO2/PR alarms
- Spot Check SpO2, PR, Respiration Rate
- Bluetooth device connection
- Shareable sleep data
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The updated OxyKnight® App is now compatible with multiple CMI Health smart oximeters including the OxyKnight® Watch, the OxyKnight® Watch Lite, and the OxyKnight® Finger. The OxyKnight® Watch and Watch Lite are perfect for anyone who snores, who feels not fully rested after sleep, has sleep disorders or oxygen issues, or people who may need to be monitored during sleep. They are very comfortable to wear and operate continuously throughout the night. It’s made with a soft, flexible fingertip cup and adjustable wrist strap for simple use. Just 1 tap within the App to connect the Watch with the OxyKnight® App via Bluetooth. The OxyKnight® Finger is a clinical-grade smart fingertip oximeter designed for home use, sports, and aviation. Check your oxygen saturation anytime, anywhere, and sync results effortlessly with the OxyKnight® App. FEATURES (Need the compatible and designated OxyKnight® device for the specific functionality) - Monitors and records HRPO (High-Resolution Pulse Oximetry) overnight - Sleep report includes SpO2 and PR trend graph, and a series of statistics. Easy to share with family members or doctors. - Trend data for sleep quality, SpO2, and PR - Customizable SpO2 and PR alarms - Spot Check SpO2, PR, and Respiration Rate Disclaimer: Please always seek a doctor’s advice before making any medical decisions.
Screenshots
Verdict
RespiRelax+ and OxyKnight both sit at 4.1 stars, but that hides the real split: 70% of RespiRelax+'s written reviews are positive against 50% of OxyKnight's. OxyKnight's advantage is iOS requirement (13.0 vs 15.6). On price, rating, ratings volume and update cadence 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.1 for RespiRelax+ against 4.0 for OxyKnight. Both are backed by a comparable volume of ratings — 16 and 12 respectively. Written reviews are what separate them: 70% of RespiRelax+'s written reviews are positive against 50% of OxyKnight's.
RespiRelax+ ships an update every 3 weeks, OxyKnight fortnightly. The most recent releases landed on October 29, 2026 and October 22, 2026 respectively.
| Parameter | RespiRelax+ | OxyKnight |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (16 ratings) — better | 4.0 (12 ratings) |
| Positive reviews | 69.6% of reviews — better | 50.0% of reviews |
| Number of ratings | 16 — better | 12 |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 84 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Les Thermes d'Allevard | CMI Health Inc. |
Customer experience
RespiRelax+
OxyKnight
Bugs and requests
RespiRelax+
Reported bugs
12 issues- Custom session timing not constant
- Progressive sound option disappeared
- Sound settings not remembered
- Customization option not functional
- Cannot use with headphones
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- Sound not working on Apple devices
- App rotation issue on iPad
- Screen remains on after session
- App cannot be deleted
- Sound issues with new version
- Grating sound at direction changes
- Minor crackling sound
Requested features
14 requests- Apple Watch integration
- Customizable hold/apnea phases
- Ability to combine sessions
- Add duration of apnea for experts
- Calendar/progress tracking
Show 9 moreShow fewer
- Reminders for sessions
- Option to choose old music/sounds
- Vibrator mode for public use
- Screen turns off automatically
- More contrast in colors for low vision
- Longer inhale/exhale duration (up to 15s)
- Ability to hold breath between breaths
- Choice of background music for relaxation
- Full protocol including respiration, imagination, and positive feelings
OxyKnight
Not enough reviews yet to summarise bugs or requests.
In-app purchases
RespiRelax+
No in-app purchases
OxyKnight
No in-app purchases









