# Зарница СЛР vs ECG Trainer

The clearest difference is in-app purchases: Зарница СЛР at none against ECG Trainer's 1. Зарница СЛР also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, update cadence and ads there is nothing between them.

Both are free to download. ECG Trainer sells 1 one-off in-app purchase. Зарница СЛР asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Зарница СЛР | ECG Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/ecg-trainer/id6760586769/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free |
| Size | 513 MB | 39 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Зарница](https://appshunter.io/developer/1135988729) | [Oleksandr Galaguta](https://appshunter.io/developer/1885178132) |

## What reviewers say

### Зарница СЛР

[App page](https://appshunter.io/ios/app/id6449221256)

**Features:** macOS Compatibility

**In-app purchases:** none


### ECG Trainer

[App page](https://appshunter.io/ios/app/ecg-trainer/id6760586769)

This app offers an interactive way to practice recognizing ECG patterns using real cardiograms. It provides diagnostic criteria and flexible training settings to help users master ECG interpretation for educational purposes.

**Highlights:** Real ECG examples, Diagnostic criteria explanations, Accessible pathology descriptions, Flexible training configurations, Focus on ECG signs

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $1.99 | one-time |


## Frequently asked questions

### Is Зарница СЛР free?

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

### Is ECG Trainer free?

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

### Do Зарница СЛР or ECG Trainer have ads?

Neither Зарница СЛР nor ECG Trainer shows ads.

### Which is updated more often, Зарница СЛР or ECG Trainer?

Зарница СЛР ships an update every 3 weeks, and ECG Trainer every 3 weeks. Most recently, Зарница СЛР was updated on October 2, 2026 and ECG Trainer on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*