Comparison

Passive Sampler vs Sonar

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

Head to head
About

Passive Sampler

Features
Read full description

Passive sampler is an application to facilitate air quality monitoring. The application has been developed for a wide variety of projects aiming to simplify the execution of monitoring campaigns with passive samplers/sensors. The application has been designed for variety of projects covering: • Experts users • Collective users • Citizen science • Epidemiological studies • Personal exposure Key aspects of the application are: • User-friendly screens to deploy and collect samplers/sensors • Save site location by phone’s GPS • Upload pictures of the monitoring site • Share pictures of the monitoring sites on twitter, facebook or just e-mail it to a friend • Update user information • View map with all your monitoring locations • Extract information of you monitoring campaign The application has been developed for any type of passive sampler (NO2, O3, BTEX, SO2…). It can be adapted to any field monitoring campaign

About

Sonar

Unify data from all your wearables and lifestyle trackers to gain personalized health insights. Understand your sleep, recovery, stress, and activity with AI-powered analysis and daily guidance to optimize your well-being.

Highlights
  • Syncs with multiple wearables and apps
  • AI-powered personalized health insights
  • Daily scores for recovery, sleep, and stress
  • Detailed training analytics
  • 24/7 vitals monitoring
  • Tailored health recommendations
Features
Read full description

Your body is talking. Are you listening? Sonar unifies all of your wearables, lifestyle, and biomarker data to unlock personalized insights and detection once reserved for elite athletes and biohackers. Trusted by 250,000+ users across 170+ countries, Sonar helps you cut through the noise across sleep, recovery, stress, activity, and nutrition - so you can focus on what actually matters. Sonar isn't just another health tracker. It merges the latest medical, sports and data science with AI engines that continuously surface subtle shifts and patterns across millions of data points, helping you know when to push, when to pause, and where to focus next. FEATURES: Personalized intelligence Sonar AI is a personal health agent grounded in the data across your wearables, health apps, and connected devices. Ask questions, understand changes in your scores, and get answers that reflect your actual data - not generic advice. Sonar AI also remembers personal context you give it like training goals, travel, or new routines, and factors it into how it interprets your data over time. Sync everything Fragmented data means missed signals. Connect Apple Watch, Garmin, Oura, Fitbit, Strava, Withings, MyFitnessPal, Peloton and many more. Daily scores and guidance Recovery, Strain, Sleep, Stress, Energy, and Nutrition scores help you understand your day at a glance, with practical guidance to improve. Correlations & comparisons See how any two metrics relate over time. Plot exercise against sleep, alcohol against HRV, or stress against recovery to surface the patterns driving how you feel each day. Compare up to six metrics at once, or focus the view on a single category like activity, sleep, or recovery. 24/7 vitals monitoring Track trends in HRV, resting heart rate, respiratory rate, blood oxygen, body temperature, and more, and get notified when values move outside your typical range. Training analytics All workouts in one place, with detailed summaries, heart rate zones, and training load and balance to help you build fitness without burnout. Widgets, Apple Watch & desktop app Keep Sonar close with beautiful widgets and an Apple Watch app, and explore your data on the big screen at www.sonarhealth.co Peer benchmarks See how you compare to people like you (and the broader community) across key metrics. Make it yours Choose the sections, metrics, wallpapers, and views that matter most to you, including a Favorites view for the health data you care about most. Tailored recommendations Add your medications, family history, and conditions to receive personalized checkup, vaccine, and screening recommendations based on age, sex, history, and the latest medical guidance. PUTTING PRIVACY FIRST Your health data is yours - we do not sell personal data. Our goal is to build an experience our users love, and all product and architecture decisions are built around maximizing user privacy. SUBSCRIPTION AND TERMS Sonar offers a meaningful free experience, empowering you to start transforming your health today with no strings attached. Current-day Recovery, Sleep, Strain, and Nutrition scores are free for all users. It's all part of our mission to accelerate longer, healthier, and happier lives globally. If you're looking to take your health journey to the next level, you can upgrade to Sonar Pro at any time for access to a suite of powerful features we think you'll love. Always consult with your doctor prior to making any medical decisions. Privacy Policy: https://www.sonarhealth.co/legal/privacy-policy/ Terms of Service: https://www.sonarhealth.co/legal/terms-of-service/

Screenshots

Passive Sampler4 screens
Sonar4 screens

Verdict

The call

The clearest difference is in-app purchases: Passive Sampler at none against Sonar's 7. Passive Sampler also leads on iOS requirement (13.0 vs 16.6). Sonar's advantage is update cadence (weekly vs every 3 weeks). On price, ads 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. Sonar sells 7 in-app purchases, starting at $5.99 per month. Passive Sampler asks for nothing beyond the download.

UpkeepUpdate frequency

Passive Sampler ships an update every 3 weeks, Sonar weekly. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.

Scorecard3 real differences · 7 level
Passive Sampler versus Sonar: the parameters behind the verdict, then further details
ParameterPassive SamplerSonar
PriceFreeFree
Rating—4.6 (336 ratings) — better
Positive reviews—67.5% of reviews
Number of ratings—336 — better
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS13.0 — better16.6
Further details — not scored
Size49 MB117 MB
Age rating4+4+
DeveloperEuropeAirSonar Health, Inc.

Bugs and requests

Passive Sampler

Not enough reviews yet to summarise bugs or requests.

Sonar

Reported bugs

3 issues
  • Inconsistent data syncing
  • Crashes and freezes
  • Unreliable notifications

Requested features

4 requests
  • Customizable widgets
  • Deeper data analysis and insights
  • Improved historical data tracking
  • Integration with more wearable devices

In-app purchases

None

Passive Sampler

No in-app purchases

7 purchases

Sonar

Subscriptions4
  • Sonar Pro - Monthly (Legacy)7 Days trial$5.991 Month
  • Sonar Pro - Monthly7 Days trial$5.991 Month
  • Sonar Pro - Annual (Legacy)7 Days trial$49.991 Year
Show 1 more
  • Sonar Pro - Annual7 Days trial$49.991 Year
One-time3
  • Sonar Pro - Lifetime$199.99
  • Sonar Pro - Lifetime$249.99
  • Sonar Pro - Lifetime$299.99

Questions

Is Passive Sampler free?
Passive Sampler is free to download, with no in-app purchases.
Is Sonar free?
Sonar is free to download, with in-app purchases available.
Do Passive Sampler or Sonar have ads?
Neither Passive Sampler nor Sonar shows ads.
Which is updated more often, Passive Sampler or Sonar?
Passive Sampler ships an update every 3 weeks, and Sonar weekly. Most recently, Passive Sampler was updated on October 25, 2026 and Sonar on October 21, 2026.

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