Comparison

Dreher App vs EF Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

Dreher App

Read full description

This is an app with a calculator, formulary, Unit, General for Craft professions (ISO fits, threads, ...) and many more

About

EF Calculator

Features

Read full description

This App calculates cutting data for Twist Drills, Taps, Cold Forming Taps, Thread Milling Cutters and Milling Cutters. For the collet holder EMUGE Speedsynchro® and for FRANKEN Circle Segment End Mills is a Return-on-Investment-Calculator installed. It enables a comparison of cost and time against conventional machining processes.

Screenshots

Dreher App2 screens

EF Calculator4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard2 real differences · 4 level

Dreher App versus EF Calculator: the parameters behind the verdict, then further details
Parameter	Dreher App	EF Calculator
Price	Free	Free
Update frequency	Every 4 months — better	Every 8 months
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	13.1	11.0 — better
Further details — not scored
Size	8 MB	10 MB
Age rating	4+	4+
Developer	Markus Meckel	EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik fuer Praezisionswerkzeuge

In-app purchases

None

Dreher App

No in-app purchases

None

EF Calculator

No in-app purchases

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.