Comparison

ECG Dongle vs QTc Tracker for SSRI & SNRI

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

Head to head
About

ECG Dongle

Measure your heart rate and view it in real-time. Send your results to a cardiologist for recommendations and monitor your health. No prior medical or technical knowledge is required to use this application.

Highlights
  • Heart rate measurement
  • Real-time viewing
  • Send results to cardiologist
  • Health monitoring
  • User-friendly interface
Features
Read full description

Измеряйте частоту сердечных сокращений, просматривайте в режиме реального времени, отправляйте результаты исследований врачу-кардиологу и получайте рекомендации! Следите за своим здоровьем и здоровьем своих близких. Для использования не требуется медицинского или технического образования. Функциональные возможности: - измерение частоты сердечных сокращений; - просмотр в режиме реального времени; - отправка врачу-кардиологу полученных результатов измерений через мобильное приложение. *Для работы с приложением необходимо приобрести устройство ECG Dongle, подключаемый с помощью OTG-кабеля.

About

QTc Tracker for SSRI & SNRI

This app analyzes ECG data from Apple Health to calculate QT and QTc intervals, helping users monitor heart repolarization, especially when taking QT-prolonging medications. It offers trend charts, medication tracking, and PDF reports for personal use.

Highlights
  • Automatic ECG import from Apple Health
  • Precise QT measurement using tangent method
  • Multiple QTc calculation methods
  • Trend charts with normal ranges
  • Medication and therapy start date tracking
  • PDF doctor's report export
  • 100% offline functionality
Features
Read full description

QTc Tracker automatically analyzes your smartwatch ECGs from Apple Health and computes the QT and QTc interval – ideal for keeping an eye on your heart when starting, during and after SSRI therapy or other QT-prolonging medication. • Automatic import of your ECGs from Apple Health – optionally with a notification whenever a new ECG arrives • Precise QT measurement using the tangent method on an averaged, low-noise heartbeat • QTc via Fridericia, Bazett, Framingham and Hodges • Clear trend chart with zones (450 / 470 / 500 ms), baseline and trend line – for 1 month, 6 months, 12 months, the therapy or everything • Therapy start and end: baseline before the start, trend during therapy, recovery afterwards • Import medications and logged doses from Apple Health (iOS 26 or later) • Resting heart rate and HRV (SDNN) trends • Doctor's report as PDF: trend, ECG traces with measurement points, measurement table, medications with dose – in A4 or US Letter • Share cards for social media: “QT normal” – honest even when readings stand out • Measurement reminders, CSV export, light and dark mode, 31 languages • 100% offline: no cloud, no account, your data is never shared How it works: Record an ECG with your smartwatch. QTc Tracker reads it from Apple Health, averages the beats into a clean signal, and detects the QRS onset and T-wave end with the tangent method. From these it derives QT and the rate-corrected QTc values that you can follow over time. Important: QTc Tracker is not a medical device and does not replace a physician's ECG interpretation or diagnosis. The automatic measurement may differ from clinical assessment and is intended solely for your personal tracking. If you have symptoms or a QTc of 500 ms or more, seek medical advice, and never stop an SSRI on your own.

Screenshots

ECG Dongle4 screens
QTc Tracker for SSRI & SNRI4 screens

Verdict

The call

The clearest difference is review sentiment: QTc Tracker for SSRI & SNRI at 100% against ECG Dongle's 29%. ECG Dongle's advantage is price (Free vs $0.99) and iOS requirement (9.0 vs 15.1). On update cadence, ads, in-app purchases 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

ECG Dongle is free to download; QTc Tracker for SSRI & SNRI costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 6 level
ECG Dongle versus QTc Tracker for SSRI & SNRI: the parameters behind the verdict, then further details
ParameterECG DongleQTc Tracker for SSRI & SNRI
PriceFree — better$0.99
Rating3.7 (3 ratings) — better—
Positive reviews29.4% of reviews100.0% of reviews — better
Number of ratings3 — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.1
Further details — not scored
Size17 MB29 MB
Age rating4+12+
DeveloperNordavindPeter Holzhauser

Customer experience

ECG Dongle

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews34 reviews
Positive29.4%
Neutral0.0%
Negative70.6%

QTc Tracker for SSRI & SNRI

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ECG Dongle

No in-app purchases

None

QTc Tracker for SSRI & SNRI

No in-app purchases

Questions

Is ECG Dongle free?
ECG Dongle is free to download, with no in-app purchases.
Is QTc Tracker for SSRI & SNRI free?
QTc Tracker for SSRI & SNRI costs $0.99, with no in-app purchases.
Do ECG Dongle or QTc Tracker for SSRI & SNRI have ads?
Neither ECG Dongle nor QTc Tracker for SSRI & SNRI shows ads.
Which is updated more often, ECG Dongle or QTc Tracker for SSRI & SNRI?
ECG Dongle ships an update every 2 months, and QTc Tracker for SSRI & SNRI every 2 months. Most recently, ECG Dongle was updated on November 2, 2026 and QTc Tracker for SSRI & SNRI on November 5, 2026.

Other comparisons