Comparison

Asthma Tracker vs Peak Flow Diary | Asthma

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

Head to head
About

Asthma Tracker

Easily track peak flow, medication, and symptoms to manage your asthma. Set reminders for daily tasks and take the Asthma Control Test™ monthly. Integrates with Health app and offers secure data sharing with your doctor.

Highlights
  • Track peak flow values
  • Record medication intake
  • Log asthma symptoms
  • Add contextual notes and events
  • Set medication and measurement reminders
  • Complete Asthma Control Test™
  • Integrate with Health app data
  • Secure data sharing with doctors
Read full description

Asthma Tracker 3 supports you in keeping your asthma diary up-to-date by making it easy to track your peak flow values, your asthma medication intake and your asthma related symptoms. In addition, you can add contextual information to each entry by either associating it with a pre-defined event (such as a doctor’s appointment) or with individual notes. With the built-in reminder, you can set Asthma Tracker to remind you to take your daily base medication, to measure your peak flow and to record your symptoms. At the end of each month, it will also prompt you to complete the widely-known Asthma Control Test™ whose intent is to give you a rough idea as to how well controlled your asthma is. The aggregated information in Asthma Tracker's chronological overview leverages the Health app to let you quickly asses how your asthma is progressing. Asthma Tracker stores and displays peak flow values stored in the Health app as well as puffs and symptoms alongside your daily step count. This way you can easily see how your daily activity influences your asthma and related symptoms. Select individual days to get a more detailed view of each entry (peak flow, puffs or symptoms) on that particular day as well as the recorded step counts on that day. Share your recorded asthma entries with your doctor during an appointment or take an in-depth look at it yourself on your desktop or other device with a bigger screen using the built-in integration with datalinker.io, our fully end-to-end encrypted solution for secure data transmission. Just visit web.datalinker.io, scan the QR code with Asthma Tracker and your entries are encrypted on your iPhone and copied securely to datalinker for temporal storage. From there you can show it to your doctor, print or save it to PDF. Do you have feedback for us or do you need help? Visit us at www.asthma-app.com and use the feedback form on our website.

About

Peak Flow Diary | Asthma

Easily record daily peak flow values and visualize breathing changes with clear graphs. Understand your asthma trends, identify early warning signs, and support your health management. Useful for medical visits and daily care.

Highlights
  • Daily peak flow recording
  • Easy input methods (slider/keyboard)
  • Zone-based graph display
  • Record list with memo management
  • Cloud storage and account support
  • Intuitive and simple operation
Features
Read full description

Understand Your Breathing, Every Day. Peak Flow Diary is an easy-to-use app that helps you record your daily peak flow readings and track changes in your breathing over time. With just a few seconds of recording each day, you can better understand: • Your usual breathing condition • Changes and trends in your breathing • When your condition starts to worsen Color-coded zones make it easy to see your current breathing status at a glance, helping you manage your respiratory health every day. 【Key Features】 ■ Quick and easy daily recording Record your peak flow in seconds using either the slider or keyboard input. Choose the method that works best for you. ■ Color-coded graphs View your peak flow readings in easy-to-read graphs. Color-coded zones help you quickly understand your current condition and identify trends over time. ■ History and notes Review all your previous records in one place. You can also save notes about your symptoms, activities, or daily events. ■ Medical Report (PDF) Automatically generate a PDF medical report from your recorded data. Print it or show it on your smartphone to help explain your condition during medical appointments. ■ Reminder notifications Set reminders so you never forget to record your peak flow. ■ Secure cloud backup Your records are safely stored in the cloud, making it easy to restore your data when changing devices. ■ Simple and intuitive design Designed to be easy to use every day, so you can build a lasting habit. 【Premium】 Unlock additional features to gain deeper insights into your breathing. ■ Breathing Monitor Analyzes your daily peak flow readings and sends push notifications when sudden drops or declining trends are detected. ■ Long-term analysis View your peak flow data over an entire year to identify long-term trends that may not be visible within just 28 days. ■ Comparison graphs Compare your current data with the previous year to better understand seasonal changes and long-term patterns. ■ Extended Medical Reports Generate PDF medical reports covering up to one year of recorded data. ■ Ad-free experience Enjoy the app without advertisements. Keeping a daily record is the first step toward better understanding your breathing. Start tracking your breathing today with Peak Flow Diary. Peak Flow Diary Terms of Service https://susatthi-asthma-diary-prod.web.app/terms-of-service.html?lang=en Peak Flow Diary Premium Terms of Service https://susatthi-asthma-diary-prod.web.app/terms-of-service-premium.html?lang=en

Screenshots

Asthma Tracker4 screens
Peak Flow Diary | Asthma4 screens

Verdict

The call

The clearest difference is rating: Peak Flow Diary | Asthma at 4.7 against Asthma Tracker's 2.8. Peak Flow Diary | Asthma also leads on review sentiment (74% vs 32%). Asthma Tracker's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, ratings volume, 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. Peak Flow Diary | Asthma sells 2 in-app purchases, starting at $3.99 per month. Asthma Tracker asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Peak Flow Diary | Asthma holds the better App Store score, 4.7 against 2.8. Both are backed by a comparable volume of ratings — 24 and 35 respectively. Written reviews point the same way: 32% of Asthma Tracker's written reviews are positive against 74% of Peak Flow Diary | Asthma's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.

Scorecard5 real differences · 5 level
Asthma Tracker versus Peak Flow Diary | Asthma: the parameters behind the verdict, then further details
ParameterAsthma TrackerPeak Flow Diary | Asthma
PriceFreeFree
Rating2.8 (24 ratings)4.7 (35 ratings) — better
Positive reviews31.7% of reviews74.2% of reviews — better
Number of ratings2435 — better
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better15.0
Further details — not scored
Size6 MB57 MB
Age rating12+4+
DeveloperKantonsspital BasellandKeyber Inc.

Customer experience

Asthma Tracker

All ratings24 ratings
Positive45.8%
Neutral4.2%
Negative50.0%
Written reviews41 reviews
Positive31.7%
Neutral14.6%
Negative53.7%

Peak Flow Diary | Asthma

All ratings35 ratings
Positive97.1%
Neutral0.0%
Negative2.9%
Written reviews31 reviews
Positive74.2%
Neutral16.1%
Negative9.7%

In-app purchases

None

Asthma Tracker

No in-app purchases

2 purchases

Peak Flow Diary | Asthma

Subscriptions2
  • Monthly Plan14 Days trial$3.991 Month
  • Annual Plan14 Days trial$24.991 Year

Questions

Is Asthma Tracker free?
Asthma Tracker is free to download, with no in-app purchases.
Is Peak Flow Diary | Asthma free?
Peak Flow Diary | Asthma is free to download, with in-app purchases available.
Which has better reviews, Asthma Tracker or Peak Flow Diary | Asthma?
Peak Flow Diary | Asthma is rated higher. Asthma Tracker averages 2.8 out of 5 from 24 ratings, while Peak Flow Diary | Asthma averages 4.7 from 35 ratings.
Do Asthma Tracker or Peak Flow Diary | Asthma have ads?
Peak Flow Diary | Asthma shows ads; Asthma Tracker does not.
Which is updated more often, Asthma Tracker or Peak Flow Diary | Asthma?
Asthma Tracker ships an update every 3 weeks, and Peak Flow Diary | Asthma every 3 weeks. Most recently, Asthma Tracker was updated on September 19, 2026 and Peak Flow Diary | Asthma on September 24, 2026.

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