Dreher App vs Thread Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dreher App
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This is an app with a calculator, formulary, Unit, General for Craft professions (ISO fits, threads, ...) and many more
Thread Calculator
This app provides a quick and easy way to calculate thread dimensions for various units, including tap hole sizes and bolt specifications. It helps metalworkers find precise measurements for internal and external threads without consulting tables.
- Thread cutting calculator for multiple units
- Cold forming calculator
- Thread repair calculator
- Tap hole and bolt diameter calculation
- Saves time compared to tables
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The app includes: - A calculator for thread cutting for the following units: M, MF, UNC, UNEF, UNF, UNR, UNS, NPT, NPTF, NPSC, NPSF, NPSL, NPSM, BA, BSP, BSF, BSW, BSPP, TR, and TRF - A calculator for cold forming - A calculator for thread repair You want to know which tap hole you should drill for threading or which bolt you should use? With this app, you will find the desired measures in no time: Simply select the desired thread type, nominal size, and pitch and you will get the matching diameter for your project. This saves precious time you would have spent tediously searching for internal and external thread dimensions in tables. As this app is still in its development phase, new features will follow soon, so stay tuned! GSR Gustav Stursberg GmbH is a manufacturer for high-quality thread cutting tools with 130 years of operational experience in the area of threading tool production. The product portfolio includes a wide selection of tools for different areas of application. GSR taps, twist drills, round dies, and tool holders are manufactured to the highest quality standards in our own production facilities. The constant quality control during the production process guarantees a consistent good quality in all national as well as international production facilities. This requires enormous precision, which is reflected by our tools. Precision is in the details. Since 1889.
Screenshots
Verdict
The clearest difference is ads: Dreher App at none against Thread Calculator's shown. Dreher App also leads on update cadence (every 4 months vs every 18 months) and iOS requirement (13.1 vs 15.0). On price, 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.
Dreher App ships an update every 4 months, Thread Calculator every 18 months. The most recent releases landed on May 16, 2026 and September 9, 2026 respectively.
| Parameter | Dreher App | Thread Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.3 (13 ratings) — better |
| Positive reviews | — | 33.3% of reviews |
| Number of ratings | — | 13 — better |
| Update frequency | Every 4 months — better | Every 18 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.1 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Markus Meckel | GSR Gustav Stursberg GmbH |
In-app purchases
Dreher App
No in-app purchases
Thread Calculator
No in-app purchases
Questions
Is Dreher App free?
Is Thread Calculator free?
Do Dreher App or Thread Calculator have ads?
Which is updated more often, Dreher App or Thread Calculator?
Other comparisons
