Comparison

CNC Machinist Calculator vs HemiSync

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

Head to head
About

CNC Machinist Calculator

This industrial calculator provides CNC programmers and machinists with instant calculations for speeds, feeds, horsepower, coolant flow, tolerances, and G-code patterns. It offers 16 production-ready tools, works offline, and features a user-friendly interface designed for the shop floor. Save and share results for improved efficiency and accuracy.

Highlights
  • Milling Speed & Feed Calculator
  • Drilling Speed & Feed Calculator
  • Tolerance & Fit Calculator
  • G-Code Reference & Generators
  • Chip Load & Tool Deflection Calculator
  • Offline functionality
  • Inch/Metric unit switching
Features
Read full description

Meet Milling • Drilling • Turning — the pocket‑sized industrial calculator trusted by CNC programmers, tool‑room veterans, and manufacturing engineers worldwide. In under a second, it turns scribbles on a setup sheet into exact spindle RPM, feed per tooth, horsepower draw, coolant flow, tolerances, and even G‑code patterns — no spreadsheets, no rules of thumb, no signal required. 16 production‑ready tools (offline) • Milling Speed & Feed • Milling Horsepower • Milling Step‑over Distance • Drilling Speed & Feed • Drilling Horsepower • Drill Size / Tap Drill Look‑up • Tap Size (pitch & class) • Turning Speed & Feed • Turning Horsepower • Turning Surface Roughness • Thread Milling (helical path, arc length, chip thinning) • Tool‑Life Predictor • Coolant Flow & Nozzle Velocity • NEW: Tolerance & Fit Calculator (ISO 286 / ANSI B4.1) • NEW: G‑Code Reference Library & Quick Generators • NEW: Chip Load & Tool Deflection Calculator What’s new and why it matters • Tolerance & Fit Calculator (ISO 286 / ANSI B4.1) • Pick standard fits (e.g. H7/g6) and get upper/lower limits, deviations, and fit type (clearance/transition/interference) instantly. • Visual tolerance zones help with assembly planning and inspection. • Inch/metric aware, with save/share for traveler notes. • G‑Code Reference & Quick Generators • Clean, searchable G‑ and M‑code library with categories, formats, and examples you can copy to clipboard. • Quick Generators: Bolt circle, rectangular and linear patterns, plus arc‑center from 3 points — perfect for one‑off ops and quick CAM notes. • Chip Load & Tool Deflection Calculator • Computes chip load per tooth, cutting forces, bending stress, overhang ratio, and tool deflection (µm & thou). • Chatter risk score with visual indicators and actionable recommendations. • Material‑aware defaults for tool and workpiece; supports carbide/HSS and common alloys. Why machinists keep it on their home screen • Built for the shop floor — big type, dark mode, glove‑friendly UI; works 100% offline. • Verified formulas & data — derived from ISO, ASM Handbook, and Machinery’s Handbook; peer‑reviewed by veteran machinists. • Inch/metric in one tap — instant unit swap, plus surface speed, chip‑load, and MRR summaries. • Smart defaults — choose tool material and workpiece alloy to pre‑fill recommended SFM and fz. • Save & share — bookmark setups, copy results to CAM notes, or AirDrop to the operator. • Light on battery, heavy on accuracy — single‑screen calculators to keep you cutting, not tapping. Built to boost OEE and quality • Hit first‑article faster with fewer test cuts. • Reduce scrap and rework through predictable feeds, speeds, and fits. • Improve tool life with correct chip load and deflection control. • Communicate clearly — standardized results you can paste into setup sheets. Always improving We ship practical, production‑ready tools that machinists actually use. If it doesn’t help you ship parts, it doesn’t ship in the app. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

HemiSync

This app generates binaural beats and isochronic tones to aid in meditation and relaxation. Explore various sound frequencies and pre-set combinations for personal wellness routines, with customizable timers and controls.

Highlights
  • Binaural beat and isochronic tone generation
  • Customizable frequency ranges (Delta, Theta, Alpha, Beta, Gamma)
  • Pre-configured audio presets
  • Session timer functionality
  • Solfeggio frequency options
Features
Read full description

Explore Audio Frequency Meditation HemiSync is an audio frequency generator that creates binaural beats and isochronic tones for meditation and relaxation practice. The app allows you to experiment with different sound frequencies that some users find helpful for their personal wellness routines. What This App Does: Generates customizable audio tones and beats Offers preset frequency combinations based on popular meditation practices Provides session timers and audio controls Includes binaural beat and isochronic tone generation modes Features: Frequency range selection (Delta, Theta, Alpha, Beta, Gamma) Adjustable beat frequencies and carrier tones Pre-configured audio presets Session timer functionality Solfeggio frequency options (396Hz, 417Hz, 432Hz) Please Note: This app is for entertainment and personal exploration purposes. It generates audio tones based on concepts from audio meditation practices. Any effects experienced are subjective and individual. Privacy Policy - https://enginezero.tech/app-privacy-policy/ Terms of Use (EULA) - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CNC Machinist Calculator4 screens
HemiSync4 screens

Verdict

The call

The clearest difference is review sentiment: HemiSync at 100% against CNC Machinist Calculator's 50%. HemiSync also leads on ratings volume (9 vs 1). CNC Machinist Calculator's advantage is rating (5.0 vs 4.2) and iOS requirement (16.6 vs 18.4). On price, update cadence, ads 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. CNC Machinist Calculator sells 3 in-app purchases, starting at $0.99 per month and HemiSync sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

CNC Machinist Calculator holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: HemiSync has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of CNC Machinist Calculator's written reviews are positive against 100% of HemiSync's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

CNC Machinist Calculator ships an update every 3 weeks, HemiSync every 5 weeks. The most recent releases landed on September 22, 2026 and August 29, 2026 respectively.

Scorecard4 real differences · 6 level
CNC Machinist Calculator versus HemiSync: the parameters behind the verdict, then further details
ParameterCNC Machinist CalculatorHemiSync
PriceFreeFree
Rating5.0 (1 ratings) — better4.2 (9 ratings)
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings19 — better
Update frequencyEvery 3 weeks — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS16.6 — better18.4
Further details — not scored
Size10 MB61 MB
Age rating4+4+
DeveloperVladislav ZhirnovEngineZero

Customer experience

CNC Machinist Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

HemiSync

All ratings9 ratings
Positive77.8%
Neutral22.2%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

CNC Machinist Calculator

Subscriptions2
  • Remove ADS monthly$0.991 Month
  • Full version / year$2.991 Year
One-time1
  • Remove ADS$4.99
1 purchases

HemiSync

Subscriptions1
  • Premium$0.991 Month

Questions

Is CNC Machinist Calculator free?
CNC Machinist Calculator is free to download, with in-app purchases available.
Is HemiSync free?
HemiSync is free to download, with in-app purchases available.
Which has better reviews, CNC Machinist Calculator or HemiSync?
CNC Machinist Calculator is rated higher. CNC Machinist Calculator averages 5.0 out of 5 from 1 ratings, while HemiSync averages 4.2 from 9 ratings.
Do CNC Machinist Calculator or HemiSync have ads?
Neither CNC Machinist Calculator nor HemiSync shows ads.
Which is updated more often, CNC Machinist Calculator or HemiSync?
CNC Machinist Calculator ships an update every 3 weeks, and HemiSync every 5 weeks. Most recently, CNC Machinist Calculator was updated on September 22, 2026 and HemiSync on August 29, 2026.

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