Comparison

THOTH ECG vs Heart Plot

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

Head to head
About

THOTH ECG

Features
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THOTH ECG (wearable dynamic electrocardiogram recorder software) can monitor heart rate for a long time, display dynamic electrocardiogram in real time, and also view heart rate in real time. When the heart rate exceeds the set expected value, there will be a sound reminder to inform, making it a good assistant for your daily life. Function: -View real-time electrocardiogram; -View real-time heart rate; -When the heart rate exceeds the set expected value, there is a sound reminder to inform; Note: This app does not replace seeking medical treatment at a hospital. If you experience any discomfort during the monitoring process, please consult a doctor or professional as soon as possible~

About

Heart Plot

Features
Read full description

IMPORTANT: This app REQUIRES a Polar H10 heart rate sensor. Heart Plot is a specialized tool designed specifically for use with the Polar H10 chest strap to visualize your heart’s rhythm in real-time using advanced Lorenz (Poincaré) plotting. By measuring the precise RR-intervals (the time between two heartbeats), Heart Plot maps your heart's behavior onto an X-Y axis. This visualization reveals the "geometry" of your heart rate, allowing you to see patterns that a simple pulse reading would never show. SEE YOUR HEART RHYTHM IN REAL-TIME - Whether you are a "data geek," a fitness enthusiast, or someone monitoring for heart irregularities, Heart Plot provides a live, growing window into your cardiac health. - Detect Irregularities: Easily spot premature contractions, or skipped beats as they happen. The visual patterns created on the Lorenz plot can help identify specific types of arrhythmia. - Capture Episodes: Perfect for users trying to "catch" an intermittent heart event to share with their healthcare provider. - Fitness & HRV: Monitor your Heart Rate Variability (HRV) visually during rest or training sessions. - Built for Endurance: Heart Plot is optimized for long-term monitoring. Whether it’s a quick check, a fitness session, or a 24-hour to 48-hour continuous measurement, the app handles long data sets with ease. KEY FEATURES: - Live Lorenz Plotting: Watch your heart’s "signature" form as the plot grows with every beat. - Stay-Awake Mode: A dedicated toggle to keep your screen on for constant monitoring during workouts or clinical observation. - High-Resolution Data: Captures every RR-interval directly from the Polar H10. - Data Export: Done with your measurement? Download the raw data as a CSV file (including all RR-intervals and timestamps) via the standard Apple Share Sheet for further analysis in Excel, Python, or R. PRIVACY FIRST Your health data is yours alone. Heart Plot does not store your data on any cloud servers. All measurements remain locally on your iPhone until you choose to export them or take a screenshot. MEDICAL DISCLAIMER: Heart Plot is a data visualization tool and is not intended to diagnose, treat, or prevent any medical condition. Please consult with a medical professional to interpret the data. The patterns revealed in the Lorenz plot are for informational and educational purposes. Requirements: - Polar H10 Heart Rate Sensor (Chest Strap) - Bluetooth-enabled iPhone

Screenshots

THOTH ECG3 screens
Heart Plot4 screens

Verdict

The call

The clearest difference is in-app purchases: THOTH ECG at none against Heart Plot's 1. THOTH ECG also leads on iOS requirement (13.0 vs 26.2). Heart Plot's advantage is update cadence (every 2 weeks vs every 8 months). 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. Heart Plot sells 1 one-off in-app purchase. THOTH ECG asks for nothing beyond the download.

UpkeepUpdate frequency

THOTH ECG ships an update every 8 months, Heart Plot every 2 weeks. The most recent releases landed on September 18, 2026 and August 25, 2026 respectively.

Scorecard3 real differences · 3 level
THOTH ECG versus Heart Plot: the parameters behind the verdict, then further details
ParameterTHOTH ECGHeart Plot
PriceFreeFree
Update frequencyEvery 8 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPod — betteriPhone
Requires iOS13.0 — better26.2
Further details — not scored
Size5 MB3 MB
Age rating12+4+
Developer索思(苏州)医疗科技有限公司Ole Luhrs

In-app purchases

None

THOTH ECG

No in-app purchases

1 purchases

Heart Plot

One-time1
  • Heart Plot Premium$1.99

Questions

Is THOTH ECG free?
THOTH ECG is free to download, with no in-app purchases.
Is Heart Plot free?
Heart Plot is free to download, with in-app purchases available.
Do THOTH ECG or Heart Plot have ads?
Neither THOTH ECG nor Heart Plot shows ads.
Which is updated more often, THOTH ECG or Heart Plot?
THOTH ECG ships an update every 8 months, and Heart Plot every 2 weeks. Most recently, THOTH ECG was updated on September 18, 2026 and Heart Plot on August 25, 2026.

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