Comparison

Machinist Calc Pro vs Thread Calculators

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

Head to head
About

Machinist Calc Pro

This app provides machining professionals with a comprehensive set of tools for calculations related to speeds, feeds, threads, and trigonometry. It aims to increase productivity and reduce tool wear by offering quick access to essential data, replacing the need for physical charts and books.

Highlights
  • Speeds and Feeds calculations
  • Thread size and drill size look-ups
  • Trigonometric functions
  • Right triangle math
  • US and Metric unit conversions
  • Built-in help
Features
Read full description

Ideal for machining pros, machine setters, tool and die makers, production engineers, shop managers and shop owners who want to increase productivity and profits in the design, layout and set-up stages of production and reduce wear and tear on costly cutting tools. And while perhaps obvious, if you change from an iOS device to a non-iOS device, you WILL need to buy a new license as they are incompatible. The Machinist Calc Pro is the first machining math and reference tool to provide a complete assortment of machine shop solutions. It has more complete Thread data than the Machinery's Handbook, including step-saving Thread and Drill Size chart look-ups, speeds and feeds, right triangle solutions, bolt patterns and much more. Spend more time machining and less time looking up specs and data in books, on charts or in computer programs. FEATURES: • Created by Calculated Industries, the originator of the award-winning Construction Master calculators • Built-in help, just press and hold a key • All the functionality and solutions of the handheld Machinist Calc Pro calculators and optimized for the iPhone device user • Entry Editing Backspace Key – with a swipe of a finger (left - to - right) • A complete User’s Guide is available free at www.calculated.com DEDICATED FUNCTIONS: • Speeds and Feeds - Calculate for Milling, Turning and Drilling; Spindle Speed (RPM), Feed Rate (IPM), Cut Speed, Cut Feed, Feed per Tooth, Number of Teeth and Radial Chip Thinning adjustment factor • Thread Size - Enter numeric, fractional or metric thread sizes and display tap, roll tap, close and free fit drill sizes. Display pitch, major and minor diameters • Drill Point - Enter the cutting angle and Drill Size and calculate the Drill Point cut depth • Drill Size - Enter numeric, letter, fractional or metric Drill Size and display the closest fitting Drill Size and scroll through available drill sizes • 3-Wire Measure - Enter Wire Size (or use calculated Best Wire size) and 3-Wire Measurement to calculate pitch diameter • Trigonometric Functions - Sine, Cosine, Tangent, Arcsine, Arccosine, Arctangent • Right Triangle Math - Enter, calculate Angle, Hypotenuse, Opposite and Adjacent side lengths Additional Features: • Thread Classification Tables ◦U.S. - Internal (3) 1B, 2B, 3B - External (3) 1A, 2A, 3A ◦Metric - Internal (14) 3G-9G and 3H-9H - External (28) 3g-9g, 3h-9h, 3e-9e, 3f-9f • U.S. and Metric Unit Entries and Conversions ◦Decimal Inches/mils ◦Feet-Inch-Fractions ◦m, mm, cm ◦Area, Volume and Weight • Works as a Standard Calculator TRADEMARKS: Machinist Calc® is a registered trademark of Calculated Industries, Inc.

About

Thread Calculators

This app provides precise thread-cutting data for various international standards. It assists machinists, engineers, and CNC professionals in quickly finding essential measurements and detailed tables for thread dimensions and cutting values.

Highlights
  • Supports international thread standards (M, UNC, NPT, etc.)
  • Tap Hole Size Calculator
  • Bolt Diameter Guide
  • Tap Hole Forming Data
  • Tap Hole Repair Values
  • Detailed thread dimension tables
Features
Read full description

Get quick and accurate thread-cutting data with this complete thread calculator app. It supports a wide range of international thread standards, including M, MF, UNC, UNF, UNEF, UNR, UNS, NPT, NPTF, NPSC, NPSF, NPSL, NPSM, BA, BSP, BSF, BSW, BSPP, TR, and TRF. Whether you're a machinist, engineer, or CNC professional, this app helps you find the right measurements instantly. Access detailed tables for thread dimensions and cutting values in one place. Key tools included: - Tap Hole Size Calculator – Find the correct drill size for perfect threading - Bolt Diameter Guide – Quickly check standard bolt dimensions - Tap Hole Forming Data – Accurate values for forming taps - Tap Hole Repair Values – Fix damaged threads with the correct specs This app is your handy companion for fast, reliable, and precise thread-cutting calculations.

Screenshots

Machinist Calc Pro4 screens
Thread Calculators4 screens

Verdict

The call

The clearest difference is price: Thread Calculators at $1.99 against Machinist Calc Pro's $24.99. Thread Calculators also leads on review sentiment (100% vs 56%) and rating (5.0 vs 4.8). Machinist Calc Pro's advantage is ratings volume (27 vs 1). On update cadence, ads, in-app purchases and monetization model 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

Machinist Calc Pro costs $24.99 and Thread Calculators $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Thread Calculators holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Machinist Calc Pro has 27 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 56% of Machinist Calc Pro's written reviews are positive against 100% of Thread Calculators's.

UpkeepUpdate frequency

Machinist Calc Pro ships an update every 5 months, Thread Calculators every 10 months. The most recent releases landed on September 27, 2026 and August 1, 2026 respectively.

Scorecard5 real differences · 5 level
Machinist Calc Pro versus Thread Calculators: the parameters behind the verdict, then further details
ParameterMachinist Calc ProThread Calculators
Price$24.99$1.99 — better
Rating4.8 (27 ratings)5.0 (1 ratings) — better
Positive reviews55.6% of reviews100.0% of reviews — better
Number of ratings27 — better1
Update frequencyEvery 5 months — betterEvery 10 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size14 MB51 MB
Age rating12+4+
DeveloperCalculated IndustriesKantaben Gorasiya

Customer experience

Machinist Calc Pro

All ratings27 ratings
Positive96.3%
Neutral0.0%
Negative3.7%
Written reviews18 reviews
Positive55.6%
Neutral0.0%
Negative44.4%

Thread Calculators

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Machinist Calc Pro

No in-app purchases

None

Thread Calculators

No in-app purchases

Questions

Is Machinist Calc Pro free?
Machinist Calc Pro costs $24.99, with no in-app purchases.
Is Thread Calculators free?
Thread Calculators costs $1.99, with no in-app purchases.
Which has better reviews, Machinist Calc Pro or Thread Calculators?
Thread Calculators is rated higher. Machinist Calc Pro averages 4.8 out of 5 from 27 ratings, while Thread Calculators averages 5.0 from 1 ratings.
Do Machinist Calc Pro or Thread Calculators have ads?
Neither Machinist Calc Pro nor Thread Calculators shows ads.
Which is updated more often, Machinist Calc Pro or Thread Calculators?
Machinist Calc Pro ships an update every 5 months, and Thread Calculators every 10 months. Most recently, Machinist Calc Pro was updated on September 27, 2026 and Thread Calculators on August 1, 2026.

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