Thread Calculator vs Machining Assistant
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.
Machining Assistant
This tool simplifies complex machining calculations for engineers and technicians. It offers features for cutting parameters, material weight, tolerance and fit analysis, and thread data. Designed for efficiency and accuracy, it works offline and provides a user-friendly interface.
- Cutting parameter calculation
- Material weight and volume
- Tolerance and fit analysis
- Thread data and formulas
- Offline functionality
- Material database
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Designed for mechanical engineers, CNC operators, and machining techs – makes complex calculations simple & fast! 【Core Functions】 *Cutting Parameters • Supports turning, milling, drilling • Auto-calculates spindle speed, feed rate, cutting time • Built-in material DB with recommended values • Saves parameters for quick recall *Material Weight • Supports round bar, plate, hex bar, tube • Built-in densities for steel, aluminum, copper, etc. • Custom density input allowed • Real-time weight & volume, one-tap copy *Tolerance & Fit • Supports tolerance & fit modes • Covers IT01–IT18 tolerance grades • Auto-identifies fit type (clearance, transition, interference) • Calculates upper/lower deviations, max/min sizes *Thread Formula Guide • Full metric thread data (M1–M64) • Inch thread specs • Provides major, pitch, minor dia., tap drill size • Includes common machining formulas for quick reference 【App Highlights】 • Sci-fi UI, great visual experience • Simple & intuitive – easy to use • Accurate, reliable data – meets national standards • Save parameters to boost efficiency • Works offline – calculate anywhere, anytime 【Who It's For】 • Mechanical design engineers • CNC programmers & operators • Machining technicians • Mechanical engineering students • Manufacturing pros Make machining calculations no longer a hassle – Machining Assistant helps you get twice the result with half the effort!
Screenshots
Verdict
The clearest difference is price: Thread Calculator at Free against Machining Assistant's $0.99. Thread Calculator also leads on review sentiment (33% vs 0%). Machining Assistant's advantage is ads (none vs shown) and update cadence (every 5 weeks vs every 18 months). On in-app purchases, device support and iOS requirement 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
Thread Calculator is free to download; Machining Assistant costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Thread Calculator ships an update every 18 months, Machining Assistant every 5 weeks. The most recent releases landed on September 27, 2026 and October 8, 2026 respectively.
| Parameter | Thread Calculator | Machining Assistant |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.3 (13 ratings) — better | — |
| Positive reviews | 33.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 13 — better | — |
| Update frequency | Every 18 months | Every 5 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 25 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | GSR Gustav Stursberg GmbH | 小燕 陈 |
Customer experience
Thread Calculator
Machining Assistant
In-app purchases
Thread Calculator
No in-app purchases
Machining Assistant
No in-app purchases
Questions
Is Thread Calculator free?
Is Machining Assistant free?
Do Thread Calculator or Machining Assistant have ads?
Which is updated more often, Thread Calculator or Machining Assistant?
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