EF Calculator vs botek assistant
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EF Calculator
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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.
botek assistant
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Calculate your cutting data for the manufacturing processes drilling, milling and turning with the botek assistant. Always and everywhere - even offline - the specially developed app for calculating machining times is available to you. Your advantages: - Clear user-friendly interface - Simple navigation - Integrated links to the product finder or botek Webshop - Hardness values comparison table, triangle calculation, tool-independent cutting data calculation - ISO tolerance table for shafts and bores - Surface comparison table
Screenshots
Verdict
The clearest difference is update cadence: botek assistant at every 2 months against EF Calculator's every 8 months. EF Calculator's advantage is iOS requirement (11.0 vs 15). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
EF Calculator ships an update every 8 months, botek assistant every 2 months. The most recent releases landed on September 4, 2026 and September 12, 2026 respectively.
| Parameter | EF Calculator | botek assistant |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15 |
| Further details — not scored | ||
| Size | 10 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik fuer Praezisionswerkzeuge | botek Praezisionsbohrtechnik GmbH |
In-app purchases
EF Calculator
No in-app purchases
botek assistant
No in-app purchases
Questions
Is EF Calculator free?
Is botek assistant free?
Do EF Calculator or botek assistant have ads?
Which is updated more often, EF Calculator or botek assistant?
Other comparisons
