Thread Calculator vs Aufmaster
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Aufmaster
Streamline cable measurement and documentation with your iPhone and a digital measuring device. Quickly record lengths, locations, and project details, and manage inventory efficiently, eliminating the need for paper records.
- Digital cable length measurement via iPhone + AM1
- Document measurements with time, location, and user
- Offline measurements with later sync
- Inventory and warehouse management
- Cloud account for project and inventory overview
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Job documentation and cable inventory, digital: the cable length meter with app and cloud. Built by the trade, for the trade. Looking for job documentation or inventory software for your electrical business? Aufmaster comes with the meter. Measure a cable length in 30 seconds. The meter and the Aufmaster app log every measurement automatically. No paper. No typing. Patented measuring method. Designed and built in Germany. Job tracking: Measure on site, bill from the office. Every length you measure makes it onto the invoice, filed under the right project. Cable inventory: See what's left on the reel. Right away. Inventory count? Done before your coffee gets cold. Fewer errors, faster finish. On every job, at every inventory count. Find out how to cut your overhead by up to 30% at aufmaster.com/en.
Screenshots
Verdict
The clearest difference is ads: Aufmaster at none against Thread Calculator's shown. Aufmaster also leads on update cadence (every 4 weeks vs every 18 months) and monetization model (free vs ad-supported). Thread Calculator's advantage is device support (3 vs 1) and ratings volume (13 vs 4). On price, rating and in-app purchases 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.
On the App Store both sit at effectively the same score — 4.3 for Thread Calculator against 4.3 for Aufmaster. Both are backed by a comparable volume of ratings — 13 and 4 respectively.
Thread Calculator ships an update every 18 months, Aufmaster every 4 weeks. The most recent releases landed on September 27, 2026 and October 12, 2026 respectively.
| Parameter | Thread Calculator | Aufmaster |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (13 ratings) — better | 4.3 (4 ratings) |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 13 — better | 4 |
| Update frequency | Every 18 months | Every 4 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 25 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | GSR Gustav Stursberg GmbH | Aufmaster GmbH |
Customer experience
Thread Calculator
Aufmaster
In-app purchases
Thread Calculator
No in-app purchases
Aufmaster
No in-app purchases
Questions
Is Thread Calculator free?
Is Aufmaster free?
Which has better reviews, Thread Calculator or Aufmaster?
Do Thread Calculator or Aufmaster have ads?
Which is updated more often, Thread Calculator or Aufmaster?
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