Comparison

ThreadKing vs Thread Calculator

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

Head to head
About

ThreadKing

This app serves as a comprehensive reference and calculator for various thread types and dimensions. It provides detailed information on Metric and UN threads, including tap sizes and thread calculations for cutting and forming taps. Users can also find drill size charts and calculate RPM and feed rates for different materials.

Highlights
  • Metric and UN thread reference
  • Drill/Tap size charts
  • Pipe thread information
  • Cutting tap calculator
  • Forming tap calculator
  • RPM and feed rate calculator
  • Thread dimension details
Features
Read full description

ThreadKing is the ultimate reference and calculator for threads. It contains all the information for Metric and UN Taps, Fine/Course Threads, Drill/Tap sizes, Pipe Tap sizes, and Thread Dimension. ThreadKing is also a handy calculator for finding the right drill size in Cutting Tap and Forming Tap based on Thread Percentage. Besides, it calculates RPM and feed rates in Cutting Tap for different materials FEATURES: - Drill/Tap Chart available in drill size standards: Fractional, Letter, Wire Gauge and Metric - Course and Fine Thread - Pipe Thread Chart - Cutting Tap Calculator based on Thread Percentage - Forming Tap Calculator based on Thread Percentage - Cut Tapping RPM and Feed Rate Calculator - Thread Dimension Information: Major Dia, Pitch Dia, Minor Dia, Pitch, Thread Height, Threads per Inch - Formular and Equations for Reference

About

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.

Highlights
  • Thread cutting calculator for multiple units
  • Cold forming calculator
  • Thread repair calculator
  • Tap hole and bolt diameter calculation
  • Saves time compared to tables
Features
Read full description

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

ThreadKing4 screens
Thread Calculator4 screens

Verdict

The call

The clearest difference is review sentiment: ThreadKing at 100% against Thread Calculator's 33%. ThreadKing also leads on ads (none vs shown) and update cadence (every 6 days vs every 18 months). On price, ratings volume, 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.

ReceptionRating · Positive reviews · Number of ratings

ThreadKing holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 12 and 13 respectively. Written reviews point the same way: 100% of ThreadKing's written reviews are positive against 33% of Thread Calculator's.

UpkeepUpdate frequency

ThreadKing ships an update every 6 days, Thread Calculator every 18 months. The most recent releases landed on October 9, 2026 and September 27, 2026 respectively.

Scorecard6 real differences · 4 level
ThreadKing versus Thread Calculator: the parameters behind the verdict, then further details
ParameterThreadKingThread Calculator
PriceFreeFree
Rating4.7 (12 ratings) — better4.3 (13 ratings)
Positive reviews100.0% of reviews — better33.3% of reviews
Number of ratings1213 — better
Update frequencyEvery 6 days — betterEvery 18 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.1 — better15.0
Further details — not scored
Size7 MB25 MB
Age rating4+4+
DeveloperMotionics LLCGSR Gustav Stursberg GmbH

Customer experience

ThreadKing

All ratings12 ratings
Positive91.7%
Neutral8.3%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Thread Calculator

All ratings13 ratings
Positive84.6%
Neutral7.7%
Negative7.7%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

ThreadKing

No in-app purchases

None

Thread Calculator

No in-app purchases

Questions

Is ThreadKing free?
ThreadKing is free to download, with no in-app purchases.
Is Thread Calculator free?
Thread Calculator is free to download, with no in-app purchases.
Which has better reviews, ThreadKing or Thread Calculator?
ThreadKing is rated higher. ThreadKing averages 4.7 out of 5 from 12 ratings, while Thread Calculator averages 4.3 from 13 ratings.
Do ThreadKing or Thread Calculator have ads?
Thread Calculator shows ads; ThreadKing does not.
Which is updated more often, ThreadKing or Thread Calculator?
ThreadKing ships an update every 6 days, and Thread Calculator every 18 months. Most recently, ThreadKing was updated on October 9, 2026 and Thread Calculator on September 27, 2026.

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