# EF: ejection fraction — EF calculator with Teichholz

> EF calculator with Teichholz (iPhone/iPad app by Keiji Matsui.)

- Source: https://appshunter.io/ios/app/ef-ejection-fraction/id1342185936 (this page in markdown: same URL + `.md`)
- Developer: [Keiji Matsui](https://appshunter.io/developer/365287272)
- Category: Medical
- Price: Free
- Age rating: 17+
- Requires: iOS 12.0 · 22 MB
- Languages: American English
- Released: 2018-02-01
- Data updated: 2026-05-18
- User reviews in markdown: https://appshunter.io/ios/app/ef-ejection-fraction/id1342185936/reviews.md

## What is EF?

EF: ejection fraction, an iPhone and Apple Watch application, can calculate ejection fraction easily. Teichholz formula is used to calculate EF.


## Version history (last 2 releases)

### 1.1 — 2022-01-03

Added the privacy policy

### 1.0 — 2018-01-31

This app has been updated by Apple to display the Apple Watch app icon.

## Apps similar to EF

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [EchoLab](https://appshunter.io/ios/app/echolab/id427460805) | — | $4.99 | Medical |
| [Observe.](https://appshunter.io/ios/app/observe/id6738393422) | — | Free | Medical |
| [CongruenceIndexApp](https://appshunter.io/ios/app/congruenceindexapp/id1316760196) | — | $0.99 | Medical |
| [NeckShaftAngle App](https://appshunter.io/ios/app/neckshaftangle-app/id1286360878) | — | $3.99 | Medical |
| [SharpAngleApp](https://appshunter.io/ios/app/sharpangleapp/id1295934301) | — | $2.99 | Medical |
| [EBMcalc Neurology](https://appshunter.io/ios/app/ebmcalc-neurology/id369960944) | 1.0 (1) | $4.99 | Medical |

## More apps by Keiji Matsui

- [Gompertz-Matsui Calculator](https://appshunter.io/ios/app/gompertz-matsui-calculator/id365287269)
- [Gompertz curve Calculator](https://appshunter.io/ios/app/gompertz-curve-calculator/id369690729)
- [Bayes' post-test probability calculator](https://appshunter.io/ios/app/bayes-post-test-probability-calculator/id371920137)
- [肝硬変重症度Child分類・消化器癌進行度分類](https://appshunter.io/ios/app/child/id375548945)
- [与芝の式](https://appshunter.io/ios/app/id397979136)
- [廃用症候群 Barthel Index・FIM評価表](https://appshunter.io/ios/app/barthel-indexfim/id418877243)

All apps by Keiji Matsui: https://appshunter.io/developer/365287272

## Related topics

[ejection](https://appshunter.io/ios/topics/ejection)

---

*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 2026-05-18.*