# Introvert vs ECG Trainer

The clearest difference is review sentiment: Introvert at 48% against ECG Trainer's 0%. Introvert also leads on rating (4.7 vs 1.0) and ratings volume (892 vs 1). ECG Trainer's advantage is monetization model (free vs free with in-app purchases). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Introvert sells 10 in-app purchases, starting at $6.99 per month and ECG Trainer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Introvert holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Introvert has 892 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 48% of Introvert's written reviews are positive against 0% of ECG Trainer's.

Introvert ships an update every 11 days, ECG Trainer every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Introvert | ECG Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (892 ratings)](https://appshunter.io/ios/app/introvert-self-development/id1561586203/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/ecg-trainer/id6760586769/reviews) |
| Number of ratings | **892** | 1 |
| Positive reviews | **47.9% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 488 MB | 39 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [ArtIntrovert LLC](https://appshunter.io/developer/1727512095) | [Oleksandr Galaguta](https://appshunter.io/developer/1885178132) |

## What reviewers say

### Introvert

[App page](https://appshunter.io/ios/app/introvert-self-development/id1561586203)

Access concise, 20-minute lectures summarizing books and studies on diverse topics. Earn certificates, track progress, and listen offline or in the background. Join a global community focused on self-growth.

**Highlights:** 20-minute lecture summaries, 500+ book summaries, 13 diverse topics, Certificates of completion, Progress tracking and ratings, Offline listening, Background playback

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Тариф 1 месяц | $6.99 | per month |
| Monthly rate | $6.99 | per month |
| 1 month subscription | $6.99 | per month |
| 1 year subscription | $49.99 | per year |
| Лекция | $0.99 | one-time |
| Лекция | $4.99 | one-time |
| Видеолекция | $9.99 | one-time |
| Профильный курс | $42.99 | one-time |
| Профильный курс | $49.99 | one-time |
| Профильный курс | $54.99 | one-time |

**What reviewers like**

- 🚀 Interesting and informative lectures
- 👍 Convenient and intuitive interface
- 💡 Gamification elements like rating and rewards
- 🤖 Helpful AI assistant
- 🌐 Diverse range of topics covered

**What reviewers complain about**

- 🐛 Frequent bugs and glitches
- 🔌 Issues with offline mode and downloads
- 💸 Unclear subscription management and cancellation
- 🔍 Lack of search and filtering options
- 🔊 Poor audio/video synchronization

**Reported bugs**

- White screen issues
- Login and registration problems
- Inconsistent progress tracking
- Subscription billing errors
- Compatibility issues on older devices

**Requested features**

- Option to adjust text size
- Improved offline capabilities
- Seamless integration between app and website
- More personalization options
- Subtitles and transcripts for lectures


### 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 Introvert free?

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

### Is ECG Trainer free?

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

### Which has better reviews, Introvert or ECG Trainer?

Introvert is rated higher. Introvert averages 4.7 out of 5 from 892 ratings, while ECG Trainer averages 1.0 from 1 ratings.

### Do Introvert or ECG Trainer have ads?

Neither Introvert nor ECG Trainer shows ads.

### Which is updated more often, Introvert or ECG Trainer?

Introvert ships an update every 11 days, and ECG Trainer every 3 weeks. Most recently, Introvert was updated on November 3, 2026 and ECG Trainer on October 31, 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.*