# Chest Compression Fraction CCF — Calculate CCF Percentage @ CPR

> Calculate chest compression fraction percentage during CPR with metronome. (iPhone/iPad app by STAR CPR San Diego.)

- Source: https://appshunter.io/ios/app/chest-compression-fraction-ccf/id1565028479 (this page in markdown: same URL + `.md`)
- Developer: [STAR CPR San Diego](https://appshunter.io/developer/427133089)
- Category: Education, Medical
- Price: $1.99
- Rating: 1.70/5 from 10 App Store ratings · 10 written reviews indexed
- Age rating: 12+
- Requires: iOS 13.4 · 8 MB
- Languages: American English
- Released: 2021-05-04
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/chest-compression-fraction-ccf/id1565028479/reviews.md

## What is Chest Compression Fraction CCF?

As you know Interruptions in chest compressions during cardiopulmonary resuscitation (CPR) can decrease the survival rate in out of hospital cardiac arrest. Perfusion stops when CPR stops. The chest compression fraction (CCF) is the amount of time spent administering chest compressions during cardiac arrest. If you can obtain a CCF above 80% you can dramatically increase the survival rate. The CCF Calculator works in conjunction with a compression rate of at least 100/min, assuring adequate compression depth and recoil. Thats why we also included a metronome for 100 and 120 beats per minute.

## Key features

- Calculate CCF percentage
- CPR survival rate improvement
- Metronome for 100/120 BPM
- Assures adequate compression depth
- Assures adequate recoil

## Recent user reviews (10 of 10)

All indexed reviews: https://appshunter.io/ios/app/chest-compression-fraction-ccf/id1565028479/reviews.md

### 1/5 — App does not work

*2026-02-17*

Neither cpr nor stop timers work. Ccf not calculated. Is just a metronome but with a slightly irregular sounding beat (i think they just cary the pitch in every 5th beat or something but it makes it sound out if time.)

### 1/5 — Don’t buy

*2025-12-08*

Only works with special watch that costs over $500

### 1/5 — Does not work

*2024-12-08*

Does not work on iPhone 16

### 1/5 — Not a very useful app

*2024-11-26*

Disappointed with this app. 
Reason why: you need to change/estimate how long the code is going to run for. When in practicing case scenarios it’s not always known how long a practice code is going to last. Even if you over shoot how long a code is going to run - you don’t get an accurate CCF. I was hopeful this app would work as well at the free android app. When you start the code the time clock should click up & when the code is done - the CCF should calculate. Hopefully the developers can fix this problem.

### 1/5 — Useless App

*2024-07-03*

App will not work on Apple phone. Requesting a refund worked just as well!

### 4/5 — I use this application CCF Calculator for 2+people Basic Life Support Instruction

*2024-05-29*

I have been using this application to emphasize the evidence-based ROC Trials results for AHA (Chest Compression Fraction) of 80% or higher and to increase survival of our Cardiac Arrest Patients.

I usually assign 4 students per 2-rescuer BLS scenario. I start using a short demonstration for my students on the Competencies expected for this portion of Basic Life Support. Often is turns into a low-key competition between groups with encouraging remarks and applause if 90% or higher is achieved. A wonderfully supportive tool for my students with lots of positive feedback.

I use this app on a iPad MacBook Air device. However, I need to close the application completely before the next group is tested.

### 1/5 — Waste of money and time

*2023-01-12*

This is a terrible app. No tutorial. Stuck in note mode. Does not keep two times like you need for CCF. Have to restart every two min. As if a code only lasts two min. Could be so much better if two timers that you could manipulate and a continuous 2 min count down as well.

### 1/5 — Does not work well on iPhone

*2021-10-22*

I really wanted to have a great app like this. Cannot get the CCF to show up on my iPhone. No instructions, no settings, trying to figure out the app. I finally got the CCF to show up once by tap in holding the dart Sim icon? And then it never came up again. The mail or message feature, does not work. Try tapping on that, tapping in holding, nothing seems to work.

**Developer response:** Hi LShields,

Thank you for your feedback. I will look into the issue you described. Thank you, Erik

### 1/5 — Note is not working

*2021-08-15*

The app keeps getting stuck in note mode. There is no other way to get out of the note as to restart the app. Useless

**Developer response:** Hello, thank you for your feedback. I work on a fix for this issue. Thank you, Erik.

### 5/5 — Great little App!

*2021-05-06*

I have my students download this app when doing the multiple rescuer CPR in my BLS Classes. One student is compressing, the other rescue breathing, the other AED use and one controlling the CCF App. The person with the app is keeping track of compressions. There is even a notes feature that allows you to keep track of shocks given. You can then after the code share with a friend or just take a screenshot for debriefing. For ACLS this is great because you can have an extra roll for someone keeping track of high quality CPR. With the App they can keep track and note what medications were given, shocks and whatever else. It’s a great tool!

## Frequently asked questions about Chest Compression Fraction CCF

### What is the Chest Compression Fraction CCF app?

Chest Compression Fraction CCF is a paid application designed to help calculate the chest compression fraction during CPR. It aims to improve survival rates by ensuring adequate compression time.

### How does Chest Compression Fraction CCF help improve CPR?

By calculating the chest compression fraction (CCF), the app helps users understand the percentage of time spent on compressions. Achieving a CCF above 80% can dramatically increase survival rates in cardiac arrest situations.

### Does Chest Compression Fraction CCF include a metronome?

Yes, Chest Compression Fraction CCF includes a metronome feature. It supports both 100 and 120 beats per minute to help users maintain the recommended compression rate during CPR.

### What is the price of Chest Compression Fraction CCF?

Chest Compression Fraction CCF is a paid app priced at $1.99. This one-time purchase grants access to its features for calculating CCF and using the metronome.

### On which devices can I use Chest Compression Fraction CCF?

Chest Compression Fraction CCF is available for iPhone, iPad, and iPod. It is designed for use on Apple's mobile operating system.

### What is the age rating for Chest Compression Fraction CCF?

Chest Compression Fraction CCF has an age rating of 12+. This indicates it is suitable for users aged 12 and above.

### How often is Chest Compression Fraction CCF updated?

Chest Compression Fraction CCF was last updated on May 4, 2021, with version 1.0. Further update frequency is not specified in the provided data.

### Does Chest Compression Fraction CCF have ads?

No, Chest Compression Fraction CCF does not contain advertisements. As a paid application, it offers an ad-free experience.

## Version history (last 1 release)

### 1.0 — 2021-05-04

No release notes.

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## More apps by STAR CPR San Diego

- [DART Sim](https://appshunter.io/ios/app/dart-sim/id427133086)
- [DART Sim Remote](https://appshunter.io/ios/app/dart-sim-remote/id702741637)
- [DART Sim for iPhone](https://appshunter.io/ios/app/dart-sim-for-iphone/id1562814997)
- [DART Sim Pro](https://appshunter.io/ios/app/dart-sim-pro/id6749266877)
- [DART Sim Pro Remote](https://appshunter.io/ios/app/dart-sim-pro-remote/id6754192410)

All apps by STAR CPR San Diego: https://appshunter.io/developer/427133089

## Related topics

[chest compression fraction ccf](https://appshunter.io/ios/topics/chest-compression-fraction-ccf)

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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 2026-08-26.*