Comparison

CARDIO vs ECG Audio

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

Head to head

About

CARDIO

Read full description

CARDIO is a special application for CardioQVARK device usage with the patient’s cable and the chair for comfortable ECG registration

About

ECG Audio

Features

Read full description

Monitor your heart work in real time, save results in pdf format ! Control your health and the health of your family. No medical or technical education required. Attention! It is not a medical report. Consult a physician in addition to using this application and before making any medical decisions. * To work with the application, you need to purchase the "Serdechko" device or devices with similar parameters.

Screenshots

CARDIO1 screens

ECG Audio4 screens

Verdict

The call

The clearest difference is in-app purchases: CARDIO at none against ECG Audio's 1. CARDIO also leads on update cadence (monthly vs every 2 months). On price, ads, device support and iOS requirement 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. ECG Audio sells 1 one-off in-app purchase. CARDIO asks for nothing beyond the download.

UpkeepUpdate frequency

CARDIO ships an update monthly, ECG Audio every 2 months. The most recent releases landed on October 18, 2026 and October 19, 2026 respectively.

Scorecard2 real differences · 4 level

CARDIO versus ECG Audio: the parameters behind the verdict, then further details
Parameter	CARDIO	ECG Audio
Price	Free	Free
Update frequency	Monthly — better	Every 2 months
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPod	iPhone, iPod
Requires iOS	12.3	12.0 — better
Further details — not scored
Size	2 MB	21 MB
Age rating	4+	17+
Developer	CardioQVARK, OOO	Nordavind

In-app purchases

None

CARDIO

No in-app purchases

1 purchases

ECG Audio

One-time1

Full app version$0.99

Questions

Is CARDIO free?

CARDIO is free to download, with no in-app purchases.

Is ECG Audio free?

ECG Audio is free to download, with in-app purchases available.

Do CARDIO or ECG Audio have ads?

Neither CARDIO nor ECG Audio shows ads.

Which is updated more often, CARDIO or ECG Audio?

CARDIO ships an update monthly, and ECG Audio every 2 months. Most recently, CARDIO was updated on October 18, 2026 and ECG Audio on October 19, 2026.