# CNC Machinist Calculator Pro — user reviews > 86 indexed App Store user reviews of CNC Machinist Calculator Pro by Shane Anderson, rated 4.70/5 from 669 ratings. - Source: https://appshunter.io/ios/app/cnc-machinist-calculator-pro/id1037668281/reviews - App overview in markdown: https://appshunter.io/ios/app/cnc-machinist-calculator-pro/id1037668281.md - Rating breakdown: 5★ 542 · 4★ 96 · 3★ 13 · 2★ 6 · 1★ 12 ## What do users think of CNC Machinist Calculator Pro? Overall sentiment: positive **Pros** - 🚀 Useful for thread data - 👍 Helpful for programming mills and designing fixtures - 👍 Provides all the technical data needed - 👍 Great resource for learning as a beginner machinist - 👍 Fantastic machinist reference and calculator - 👍 Saves time in setup work - 👍 Comprehensive and easy to use - 👍 Invaluable for the modern machine shop employee **Cons** - 🐛 No more support or new features - 🐛 No easy reference chart for threads - 🐛 Calculator issues with mathematical operations - 🐛 Clunky UI and slow animations - 🐛 Pauses music when opened - 🐛 Thermal expansion calculator glitchy **Commonly reported bugs** - Bolt hole calculations incorrect - Thermal expansion option not working properly - Compatibility issues with newer iPhone models **Most requested features** - Cylindrical grinding calculator - Tool nose compensation for lathe - Acme thread calculator - G2/G3 configuration for milling - Drill point length calculator - Keensert and Helicoil drill/tap data - G and M code dictionary - Ceramic tool material support - Carbon fiber, fiberglass, and common plastics in feeds/speeds ## Newest reviews (15 of 86) ### 4/5 — Developer should… *2023-03-24, version 18* Just get rid of the custom keyboards, and use Apple’s default iOS keyboard when it comes to entering anything into a search field within the app. ### 5/5 — Very useful *2022-09-24, version 18* This is what I have been looking for ### 5/5 — Fantastic machinist reference and calculator in one *2022-09-11, version 18* I’ve been a machinist for decades and always recommend this application. The more you know and do as a machinist, the more you appreciate the many features and quick calculations to figure and plan your operations. I’m always using the rpm/sfm and angle solver on a daily basis for both turning and milling. ### 4/5 — Cool! *2021-11-19, version 18* Very useful. iPhones with notches affect the display of the app, please look into. ### 4/5 — Very Useful *2021-10-26, version 18* All the information I need is at my fingertips with good calculators. One downside is the calculator that doesn’t follow the rules of mathematics. 1 + 3/4 should = 1.750 not 1. ### 5/5 — Super Handy *2021-10-12, version 18* I’m a carbide tool sales rep/ applications engineer and I really like this tool. Has some great information in it and I really like that it’s in my pocket. Good stuff! ### 5/5 — Very good, but could be improved in some areas *2021-10-08* Very good so far I have used it for both milling and lace but I could not find what I need in the grinding calc. I would like to see a calc for cylindrical center grinders. I tried using the surface grinding calc to approximate the wheel pressure. Or at least a button to switch between surface grinding and cylindrical grinding. I hope to see this improvement. Thanks. ### 5/5 — Great tool!!! *2021-10-06, version 18* One of the greatest Machinist apps out there definitely worth the money ### 5/5 — Really helpful App and worth the money *2021-08-04, version 18* Just wish when I opened the app it wouldn’t stop my music from playing in my earphones. ### 5/5 — Amazing!! *2021-07-30, version 18* This app is amazing, I would spend 100 times the cost to get this. It has helped more then I can ever say. Many thanks for making this app. ### 5/5 — Outstanding!! *2021-07-11, version 18* Easy to use, highly functional, packed with information, great resource to carry in your pocket at your machine shop, should have picked this up sooner! ### 5/5 — CNC Machinist *2021-06-25, version 18* Best machine shop floor mate to have. Quick and easy to use with tons of data at your fingertips. ### 5/5 — A MUST HAVE!! *2021-06-24* As a novice machinist I’ve found this app invaluable. There is a lot here so it is an ongoing discovery. It seems pretty comprehensive and I find I rarely have to venture outside the app to find the information I need. So far it’s exceeded my expectations and my needs. Don’t go without. ### 4/5 — Time saver *2021-05-22, version 18* Saves you time in setup work. Quick and easy to use. ### 5/5 — Highly recommend this App!! *2021-02-27, version 18* I have a home machine shop and I use this app all the time. The turning and milling speeds are great and I love the drill chart for decimal equivalents, tap drill sizes, thread reference etc. You can even see me using it and recommending it on my BladesIIB YouTube channel. ## Most critical reviews (10 lowest-rated) ### 1/5 — If I reviewed you once, don’t ask a second time *2024-05-30, version 18* I bought this app several years ago. I gave them a 5 star review the first time. They ask me every month for another review. Now you get 1 star. ### 1/5 — No thread chart *2023-05-26, version 18* No easy reference chart for threads with major and minor diameters etc. you have to go through multiple menus to look up a specific tap or thread size ### 1/5 — Not worth the money *2022-01-19, version 18* If you have no concept of machining, this may help you a little, but the calculator on your phone works pretty well too. True position calculator is ok, but it would be better if it allowed you to input what print dimensions are. The speed/feed calculator doesn’t give recommended spindle speed, only calculates off max spindle speed. If you miss select something it takes you back to the top menu, and you have to go back, huge time waster. All the angle and trig you need is already on the internet for free. Not worth 13.00$ ### 1/5 — Program to cut a radius tangent to an angle. *2021-05-21, version 18* Hi, is there a way to program a corner radius tangent to a certain angle?thanks ### 1/5 — Not what I was wanting *2020-01-27, version 17* Couldn’t find anything as far as a definitive list of features of this app. Doesn’t have what I was looking for, at least I can’t find anything useful for what I wanted in the app. Wasted money. ### 1/5 — No support for notch *2019-03-18, version 17* Don’t buy if you have a new iPhone. It does something’s well but is often very laggy and slow. Their are better free options don’t waste your money. ### 2/5 — AJH *2020-10-22, version 18* Bolt hole calculations are incorrect or I am doing something wrong ### 2/5 — Button presses are abysmal *2018-06-16* There are quite a few good utilities here though the UI has one major flaw and several areas that need improvement. The major flaw is that it takes multiple presses on the buttons for data entry. A friend recommended the app to me but warned me of this problem. I didn’t realize how serious it was. Also in some case the button location is not correct so one has to press slightly above (or below) the location of the button to get the correct entry. Really, THIS NEEDS TO GET FIXED!! This app is not worth the money until this problem is resolved! No other app I have ever used has a basic data entry problem like this, please fix it. The app would get four stars if this problem was fixed. I tend not to use it because of this. The other problems are order-of-event issues with the UI, but they pale in comparison the the button entry issue. **Developer response:** Hello ojoazul - Please try the newest version of the app. It was released 11/08/18. This should fix your issue. Email me at shanesuan2@gmail.com if you have any problems. ### 3/5 — No more support *2025-03-06* I would have given this 5 stars a few years ago. It’s a great app and has a lot of useful information, but the creators of it seem to have abandoned it and aren’t adding any more features. Which is a shame cause this is my go to apps for machinist reference. ### 3/5 — Noob *2020-12-27, version 18* I just download the app I will update when I have some experience. ## Most praised reviews (10 highest-rated) ### 5/5 — Useful for the thread data alone *2025-09-11* I use this app for various things, but it’s worth it for the thread data alone. If you’re single pointing a lot of threads, it’s very handy to have thread data at your fingertips. ### 5/5 — Must have *2024-12-27, version 19* I use this app every day programming mills and designing fixtures ### 5/5 — Programmer *2024-05-02, version 18* Absolutely love it!!! All the information I need at my fingertips. ### 5/5 — Cnc machinist pro *2024-04-04* Wow.. do I love the brain check portion of this app.. I failed miserably only to memorize the answers and pass all 100%. Would love a new updated version with potentially harder questions and answers.! Love it love it love it. Btw .. recently used the Material weight calculator to ensure that I had enough lifting power for my new 990.2 lbs chunks of 6061 aluminum! Thank you designers and hosts for this app! ### 5/5 — Love the app *2024-03-21, version 18* I’m a machinist in training still learning and making mistakes, this app helps me a lot with speeds and feed and some of the things I didn’t consider before. ### 5/5 — Good *2023-06-12, version 18* Good ### 5/5 — Review *2023-06-06* This has everything I need all in one I’ve got 28 years of experience and I e always had to do research for data to have an edge. Now I have all the technical data I could ask for! ### 5/5 — CNC Keyway Broach *2023-05-23, version 18* If you are in the manufacturing industry this app is a “must buy” and something you will use every day ### 5/5 — Great *2023-02-16, version 18* Great app for learning as a beginner machinist but I would love to see a general tool information chart. Just a chart of types of mills, taps, drills, and other various tools as well as their applications. ### 5/5 — Super handy! *2022-09-30* This app comes out very handy, when you’re working around the shop and need to verify dimensions, when you create programs, and when you are away from charts, and you need acces to recomended sizes of drills, and stuff like that, It gives you a lot of info with a very simple interface, I love it, recomend it 100% --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*