Comparison

ArcCalc vs The Phillips Machinist

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

Head to head
About

ArcCalc

This app calculates various parameters of circular arcs and segments. It supports multiple input combinations and offers unit flexibility for length and angles. Calculations are automatically saved and can be shared via email.

Highlights
  • Calculates 21 cases for circular arcs
  • Supports length units in feet, inches, meters, centimeters, millimeters
  • Angle units in degrees or radians
  • Automatic saving of results
  • Error checking for out-of-range inputs
  • Share results via email
Features
Read full description

ArcCalc is a simple and easy to use app for calculating all the parts of a circular arc or segment. Given any two values, this app will calculate for the radius, length, width, height, apothem, angle, and area of a circular arc. Very useful for carpenters, architects, handymen, machinists, welders, designers, technicians, engineers, do it yourselfers, and many more. This calculator utilizes simple and complex mathematics to do all the calculating for you. If you are one of those who went to calculus class and wondered where all that knowledge can be practically applied -- this is one of them. Features: * This calculator will do calculations for all twenty one cases when given any two inputs of the radius, length, width, height, apothem, angle, and area of a circular arc. All possible solutions are presented for the given two inputs. * Length units in feet, inch, meter, centimeter, millimeter can be specified for all inputs and values to be calculated. Angle unit can be in degrees or radians. * All calculations are automatically saved in the "Saved Results" window. Saved results are grouped by date of entry. Just swipe to delete an entry no longer needed. * Complete error checking function for inputs that are out of range in relation to the other given input. The calculator will give the limits for all inputs that are out of range. * Results can be shared by email. The Arc Calculator is the mobile app version of the popular online calculator "The Complete Circular Arc Calculator". Please check it out at https://www.handymath.com/cgi-bin/arc18.cgi?submit=Entry. Please check out also other calculators you might need at www.handymath.com and on the App Store. Additional Notes: The circular segment screenshots above gives a visual illustration of the parts of a circular segment. "Width" is used in place of the more proper term "Chord" as more people go with "Width".

About

The Phillips Machinist

Access essential machine codes, calculators, and practical resources for machinists. Get direct support from engineers and explore a library of machining information. Enhance your productivity and problem-solving on the shop floor.

Highlights
  • Haas G & M reference codes
  • Error and Alarm Codes
  • Calculator library (Inch/Metric)
  • Speeds & Feeds calculator
  • Direct contact with engineers
  • Customizable machine and interest tracking
  • FAQ library
Features
Read full description

The Phillips Machinist is your personalized digital manufacturing assistant, with quick access to essential machine codes and calculators, direct contact with Phillips engineers, and practical resources designed to make your life easier. Spark your ingenuity with the Phillips Machinist, the only App you’ll need to succeed! The completely redesigned Phillips Machinist delivers a next level experience offering these key benefits: EASY ACCESS TO CODES AND MANUALS A few clicks and you can access Haas G & M reference codes, Error and Alarm Codes, Macro Variables, and functions – and find information on how to apply them to your machines. Right away. Right on the shop floor. Explore our additional libraries with items from Okamoto, Hermle, Kent, Universal Robots and Markforged. CALCULATOR LIBRARY Enhanced everyday Calculators for the CNC Machinist in both Inch and Metric wherever applicable. Now featuring an information page that not only explains how to use the calculator but also the core concepts behind it! Some inputs have been configured to show suggested ranges for the optimal performance of a CNC program to keep you on the cutting edge. The Result section provides accurate outputs along with supportive images for better understanding of the concept and the results are further fortified with an abundance of videos and articles related to that particular calculator. For example: In the Material Library and Speeds & Feeds Calculator, we have added Haas “Tip of the Day” videos, specifically talking about how the spindle speed and feed-rates affect the surface finish of a machined part. All of this is provided at your fingertips. You’ll have access to these calculators that help make your job easier on the shop floor. From Single Point Thread Turning to Speeds & Feeds we’ve got you covered. With 15 calculators and counting! • Single Point Thread Turning • Mat. Library-Speed & Feeds • Simple Speed & Feeds • Square Hex • Tap Drill - Cutting Tap • Tap Drill - Thread Forming • True Position • Bolt Circle • Countersink • Right Angle Triangle • Drill Tip Depth • Socket Head Cap Screw • Helicoil Tap Drill • Simple Bolt Clearance Chart • Simple Drill Chart A PERSONALIZED EXPERIENCE Your machines and your interests are at the forefront. Keep tabs on your machines, and requests right on your homepage. Look at custom curated videos and manuals to take your knowledge to the next level. See what is trending by checking out our featured trending topics. Favorite your most used manuals to keep everything just the way you want it! ASK THE EXPERTS Running into problems on the shop floor? Ask “live” questions to some of the country’s premier applications engineers. The “Ask Joe” section gives you a direct link to the Phillips applications team. Our vast FAQ library has a wealth of knowledge from general machining, 5-axis, and more! Any questions/or concerns, please reach out to us. We would love to hear from you through the app, or at tpm@phillipscorp.com

Screenshots

ArcCalc4 screens
The Phillips Machinist4 screens

Verdict

The call

The clearest difference is ads: ArcCalc at none against The Phillips Machinist's shown. ArcCalc also leads on monetization model (free vs free with in-app purchases) and review sentiment (88% vs 78%). The Phillips Machinist's advantage is update cadence (every 6 weeks vs every 5 months). On price, rating, ratings volume 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

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

ArcCalc holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 277 and 394 respectively. Written reviews point the same way: 88% of ArcCalc's written reviews are positive against 78% of The Phillips Machinist's.

UpkeepUpdate frequency

ArcCalc ships an update every 5 months, The Phillips Machinist every 6 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
ArcCalc versus The Phillips Machinist: the parameters behind the verdict, then further details
ParameterArcCalcThe Phillips Machinist
PriceFreeFree
Rating4.8 (277 ratings) — better4.6 (394 ratings)
Positive reviews88.1% of reviews — better78.3% of reviews
Number of ratings277394 — better
Update frequencyEvery 5 monthsEvery 6 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.0 — better15.6
Further details — not scored
Size3 MB152 MB
Age rating4+4+
DeveloperRoseller SungaPhillips Corporation

Customer experience

ArcCalc

All ratings232 ratings
Positive95.3%
Neutral2.6%
Negative2.2%
Written reviews42 reviews
Positive88.1%
Neutral2.4%
Negative9.5%

The Phillips Machinist

All ratings394 ratings
Positive90.6%
Neutral4.3%
Negative5.1%
Written reviews60 reviews
Positive78.3%
Neutral3.3%
Negative18.3%

User reviews

ArcCalc

From 277 App Store ratings

What we love

  • 👍 Accurate calculations
  • 👍 Very useful for work
  • 👍 Great for curved surfaces
  • 👍 Simple and quick
  • 👍 Free to use

Room to improve

  • 🐛 Optimization needed for large screens
  • 🐛 No metric units (initially)
  • 🐛 Needs more unit choices
  • 🐛 Incompatible with older iOS versions

The Phillips Machinist

From 394 App Store ratings

What we love

  • 👍 Easy to navigate
  • 👍 Comprehensive information
  • 👍 Great for machinists
  • 👍 Useful for school and work
  • 👍 Handy resource

Room to improve

  • 🐛 White screen on calculator
  • 🐛 Speeds and feeds calculator not working
  • 🐛 Unable to sign in
  • 🐛 App crashes instantly
  • 🐛 No volume on videos

Bugs and requests

ArcCalc

Reported bugs

2 issues
  • Not supported by iOS 11
  • No longer works with iOS 11.0

Requested features

4 requests
  • Include diagram from webpage in app
  • More unit choices, especially for radius
  • More calculator apps from developer in one app
  • Ability to set default units

The Phillips Machinist

Reported bugs

11 issues
  • Cannot sign in via Apple
  • Password incorrect error
  • Cannot reset password
  • White screen on speed and feeds calculator (iPhone)
  • Speeds and feeds calculator boxes not proper
Show 6 more
  • Unable to login, registration error
  • Blank white screen after update
  • Signup not working
  • Unable to select country for signup
  • App crashes on launch
  • No volume on videos

Requested features

4 requests
  • Fix sign-in issues
  • Resolve white screen on calculator
  • Enable offline functionality
  • Add volume to videos

In-app purchases

None

ArcCalc

No in-app purchases

None

The Phillips Machinist

No in-app purchases

Questions

Is ArcCalc free?
ArcCalc is free to download, with no in-app purchases.
Is The Phillips Machinist free?
The Phillips Machinist is free to download, with no in-app purchases.
Which has better reviews, ArcCalc or The Phillips Machinist?
ArcCalc is rated higher. ArcCalc averages 4.8 out of 5 from 277 ratings, while The Phillips Machinist averages 4.6 from 394 ratings.
Do ArcCalc or The Phillips Machinist have ads?
The Phillips Machinist shows ads; ArcCalc does not.
Which is updated more often, ArcCalc or The Phillips Machinist?
ArcCalc ships an update every 5 months, and The Phillips Machinist every 6 weeks. Most recently, ArcCalc was updated on November 1, 2026 and The Phillips Machinist on November 2, 2026.

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