Comparison

RespiRelax+ vs Opthy

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

Head to head
About

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.

Highlights
  • Personalized breathing programs
  • Stress management exercises
  • Cardiac coherence training
  • Offline practice mode
  • Adjustable session duration
  • Soothing visual and sound environments
Features
Read full description

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

About

Opthy

Measure your Pupillary Distance (PD) accurately with this app, leveraging advanced technology for personalized glasses fitting. It transforms your iPhone into a measurement device, enabling confident online prescription glasses purchases.

Highlights
  • Contactless PD measurement
  • Quick IPD for far vision
  • Order prescription glasses online
  • iPhone 3D body scanner
  • Personalized fit for glasses
Features
Read full description

Pupillary Distance: The key to your perfect glasses. Discover Opthy, powered by global eyewear expert EssilorLuxottica. Get your Pupillary Distance just right with Opthy, the solution backed by EssilorLuxottica’s eyewear experts. Swiftly measure your Pupillary Distance (PD) with a few clicks, so you can find a comfortable and personalized fit for your perfect glasses. Moreover, experience the cutting-edge capability of turning your iPhone into a 3D body scanner and measurement device for purchasing prescription Rx glasses online with Opthy. Key Features: • Advanced contactless tool for PD measurements: Opthy's cutting-edge technology specializes in swiftly capturing Pupillary Distance (PD) measurement, revolutionizing the conventional process. • Quick IPD measurements for far focal lengths: Opthy offers quick Interpupillary Distance (IPD) measurements for far vision, allowing you to find a comfortable viewing experience for distant distances. • Order online prescription glasses with confidence: Opthy empowers you to confidently order prescription glasses online, knowing that you obtained personalized measurements for achieving a comfortable fit. About Pupillary Distance: Pupillary Distance is the distance between the center of your pupils, measured in millimeters. An average PD measurement is about 63mm. This crucial metric is essential when buying glasses, as it indicates the specific lens area you look through, helping you to achieve optimal comfort and clarity in your visual experience. Swift and User-friendly: Opthy has streamlined the process for you. All you need is your iPhone; the Opthy app will walk you through the quick and seamless scan. Once done, you'll receive the all-important Pupillary Distance measurement. Suitable for Everyone: Whether you wear glasses or not, Opthy caters to all adult users. It provides personalized Pupillary Distance measurements for compatible prescriptions. Prescription Compatibility: Opthy is compatible with single-vision prescription lenses between -5D and +5D. Please note that it is unsuitable for higher-powered prescriptions, bifocals, progressives, or multifocals. Professional in-person PD measurements are recommended for achieving the best fit and visual experience for individuals requiring more complex prescriptions. Age Restriction: For user safety, Opthy is not intended for use by persons under the age of 18. EssilorLuxottica prioritizes the well-being of our users and adheres to age-appropriate guidelines. Experience Cutting-edge Technology: Opthy harnesses cutting-edge technology to enhance your eyewear selection process. Its innovative approach to measuring Pupillary Distance (PD) empowers you with your personal PD so you can make confident decisions when purchasing glasses or adjusting your virtual reality (VR) headset.

Screenshots

RespiRelax+4 screens
Opthy4 screens

Verdict

The call

The clearest difference is review sentiment: RespiRelax+ at 70% against Opthy's 13%. Opthy's advantage is rating (4.5 vs 4.1) and ratings volume (2.9K vs 16). On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Opthy holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: Opthy has 2.9K ratings behind it against 16, so its average is the more settled of the two. Written reviews complicate that: 70% of RespiRelax+'s written reviews are positive against 13% of Opthy's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

RespiRelax+ ships an update every 3 weeks, Opthy monthly. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 7 level
RespiRelax+ versus Opthy: the parameters behind the verdict, then further details
ParameterRespiRelax+Opthy
PriceFreeFree
Rating4.1 (16 ratings)4.5 (2.9K ratings) — better
Positive reviews69.6% of reviews — better13.3% of reviews
Number of ratings162.9K — better
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.614.0 — better
Further details — not scored
Size84 MB217 MB
Age rating4+12+
DeveloperLes Thermes d'AllevardLuxottica Group SPA

Customer experience

RespiRelax+

All ratings16 ratings
Positive81.3%
Neutral0.0%
Negative18.8%
Written reviews92 reviews
Positive69.6%
Neutral12.0%
Negative18.5%

Opthy

All ratings2,938 ratings
Positive85.9%
Neutral3.1%
Negative11.0%
Written reviews180 reviews
Positive13.3%
Neutral6.1%
Negative80.6%

User reviews

RespiRelax+

From 16 App Store ratings

What we love

  • ✨ Effective for anxiety management
  • 🧘‍♀️ Calming and relaxing experience
  • 👍 Simple and intuitive interface
  • 🆓 Free to use
  • 🔒 Respects data privacy

Room to improve

  • 🎶 Old music preferred by many
  • 🔔 Aggressive end-of-session sound
  • 🔊 Sound issues reported
  • 📱 Lack of Apple Watch integration
  • 🎨 New design less appealing to some

Opthy

From 2.9K App Store ratings

What we love

  • 🚀 Quick and easy
  • 📐 Accurate measurements
  • 🤖 Clear instructions

Room to improve

  • 🤔 Inconsistent results
  • 🤯 Difficult to use
  • 🕰️ Time-consuming process
  • 🔍 Lighting issues
  • 🤖 Unreliable app

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
Show 7 more
  • 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 more
  • 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

Opthy

Reported bugs

3 issues
  • App crashes or freezes
  • Face not detected despite proper lighting
  • Incompatible with certain devices

Requested features

3 requests
  • Voice guidance for instructions
  • Progress indicator during measurement
  • Ability to save and view past measurements

In-app purchases

None

RespiRelax+

No in-app purchases

None

Opthy

No in-app purchases

Questions

Is RespiRelax+ free?
RespiRelax+ is free to download, with no in-app purchases.
Is Opthy free?
Opthy is free to download, with no in-app purchases.
Which has better reviews, RespiRelax+ or Opthy?
Opthy is rated higher. RespiRelax+ averages 4.1 out of 5 from 16 ratings, while Opthy averages 4.5 from 2.9K ratings.
Do RespiRelax+ or Opthy have ads?
Neither RespiRelax+ nor Opthy shows ads.
Which is updated more often, RespiRelax+ or Opthy?
RespiRelax+ ships an update every 3 weeks, and Opthy monthly. Most recently, RespiRelax+ was updated on September 30, 2026 and Opthy on September 29, 2026.

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