# Cardiac Stress Test Calculator vs Quiet Time

The clearest difference is in-app purchases: Cardiac Stress Test Calculator at none against Quiet Time's 1. Cardiac Stress Test Calculator also leads on update cadence (daily vs every 5 weeks). Quiet Time's advantage is iOS requirement (15.1 vs 17.5). On price, ads and device support there is nothing between them.

Both are free to download. Quiet Time sells 1 in-app purchase, starting at $2.99 per month. Cardiac Stress Test Calculator asks for nothing beyond the download.

Cardiac Stress Test Calculator ships an update daily, Quiet Time every 5 weeks. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Cardiac Stress Test Calculator | Quiet Time |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/quiet-time-countdown-timer/id6755136351/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 5 weeks |
| Monetization | — | Freemium |
| Size | 3 MB | 77 MB |
| Requires iOS | 17.5 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Peyton Newton](https://appshunter.io/developer/1758426815) | [Stephen Peck](https://appshunter.io/developer/1849181578) |

## What reviewers say

### Cardiac Stress Test Calculator

[App page](https://appshunter.io/ios/app/cardiac-stress-test-calculator/id6569217337)

**In-app purchases:** none


### Quiet Time

[App page](https://appshunter.io/ios/app/quiet-time-countdown-timer/id6755136351)

This app provides a unique countdown timer that automatically resets when it detects noise. It's designed to help children stay quiet during routines and adults maintain focus during meditation or work. Enjoy peaceful moments with a simple, distraction-free interface.

**Highlights:** Automatic noise-triggered reset, Child-friendly interface, Focus and meditation timer, Distraction-free design, Configurable countdown lengths, Privacy-focused, no ads or tracking

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |


## Frequently asked questions

### Is Cardiac Stress Test Calculator free?

Cardiac Stress Test Calculator is free to download, with no in-app purchases.

### Is Quiet Time free?

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

### Do Cardiac Stress Test Calculator or Quiet Time have ads?

Neither Cardiac Stress Test Calculator nor Quiet Time shows ads.

### Which is updated more often, Cardiac Stress Test Calculator or Quiet Time?

Cardiac Stress Test Calculator ships an update daily, and Quiet Time every 5 weeks. Most recently, Cardiac Stress Test Calculator was updated on November 4, 2026 and Quiet Time on October 30, 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.*