# Heart Stabilizer — Calm your heart, live better

> Calm your heart, live better (iPhone/iPad app by Cyber Pioneers Inc.)

- Source: https://appshunter.io/ios/app/heart-stabilizer/id6740490347 (this page in markdown: same URL + `.md`)
- Developer: [Cyber Pioneers Inc](https://appshunter.io/developer/1740752075)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 47 MB
- Languages: American English
- Released: 2025-03-26
- Data updated: 2026-06-10
- User reviews in markdown: https://appshunter.io/ios/app/heart-stabilizer/id6740490347/reviews.md

## What is Heart Stabilizer?

Quardio is a cutting-edge heart rate stabilization application designed to help you manage stress, anxiety, and irregular heart rhythms effortlessly. Seamlessly integrated with Apple Watch, Quardio uses advanced algorithms based on the golden ratio to provide real-time heart rate stabilization through vibration, sound, and visual synchronization.

Whether you’re an industrial worker in high-stress environments, someone managing a heart condition like arrhythmia or tachycardia, or simply looking to maintain a balanced heart rate during daily activities, Quardio offers a non-invasive, preventive solution for your heart health.

Quardio provides various premium stabilization modes such as Start Stabilization Session, After Exercise, Morning Boost, Keep Calm, Deep Relaxation, and Idle Stab Mode, available exclusively through an active subscription. Users can try the core functionality for free by initiating stabilization sessions through a simple tap on the heart icon on the home screen. Additionally, viewing stabilization history is included in the free version.

Privacy Policy - https://docs.google.com/document/u/0/d/15EHxJbpz6B8yHrA04hbpLbmLA6s0-YDfA1J0qjWfeQo  
Terms of Use (EULA) - https://docs.google.com/document/d/1E8CWnyhd4jmvqKzRFfI2dyUhCdx6dwdTO6QglpQU68E/edit?usp=sharing

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium 1 year | $39.99 | per year |
| Premium 1 month | $3.99 | per month |



## Version history (last 5 releases)

### 1.1.0 — 2026-03-21

Added an exclusive subscription plan for early adopters. Improved app stability and fixed bugs.

### 1.0.4 — 2026-01-29

Updated the internal app name throughout the app.
Updated the splash screen to reflect the new app name.
This update focuses on branding and visual consistency; no functional changes.

### 1.0.3 — 2026-01-28

UI design updated. Name changed and overall code quality improved.

### 1.0.2 — 2025-07-15

Implemented animated cardiogram simulation graph

### 1.0.1 — 2025-06-24

Added free premium subscription period

## More apps by Cyber Pioneers Inc

- [Truth or Dare Everyone Edition](https://appshunter.io/ios/app/truth-or-dare-everyone-edition/id6494729785)

All apps by Cyber Pioneers Inc: https://appshunter.io/developer/1740752075

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*