# Dreher App vs EF Calculator

The clearest difference is update cadence: Dreher App at every 4 months against EF Calculator's every 8 months. EF Calculator's advantage is iOS requirement (11.0 vs 13.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Dreher App ships an update every 4 months, EF Calculator every 8 months. The most recent releases landed on May 16, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | Dreher App | EF Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 8 months |
| Size | 8 MB | 10 MB |
| Requires iOS | 13.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Markus Meckel](https://appshunter.io/developer/852996793) | [EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik fuer Praezisionswerkzeuge](https://appshunter.io/developer/1152974581) |

## What reviewers say

### Dreher App

[App page](https://appshunter.io/ios/app/dreher-app/id852996790)

**In-app purchases:** none


### EF Calculator

[App page](https://appshunter.io/ios/app/ef-calculator/id1164942213)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dreher App free?

Dreher App is free to download, with no in-app purchases.

### Is EF Calculator free?

EF Calculator is free to download, with no in-app purchases.

### Do Dreher App or EF Calculator have ads?

Neither Dreher App nor EF Calculator shows ads.

### Which is updated more often, Dreher App or EF Calculator?

Dreher App ships an update every 4 months, and EF Calculator every 8 months. Most recently, Dreher App was updated on May 16, 2026 and EF Calculator on September 4, 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.*