Comparison

Tolerance Helper vs CNC Lathe Calculator & Program

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

Head to head
About

Tolerance Helper

This engineering reference tool simplifies calculating ISO standard tolerances for mechanical design and manufacturing. It provides instant calculations for hole and shaft dimensions, with support for multiple units and a user-friendly interface.

Highlights
  • ISO tolerance calculations for holes and shafts
  • Complete engineering tolerance reference table
  • Minimum, maximum, and average dimension calculations
  • Multi-unit support (mm, inches, micrometers)
  • Powerful search and filtering of designations
  • User-friendly interface with color-coded indicators
  • Dark mode support
Features
Read full description

Tolerance Calculator Tolerance Calculator is a comprehensive engineering reference tool for mechanical design and precision manufacturing professionals. This app simplifies the process of calculating dimensions with ISO standard tolerances for both holes and shafts. Key Features Comprehensive Tolerance Reference Complete reference table of engineering tolerances Support for both hole and shaft designations (e.g., H7, h7) Spans all standard dimensional intervals Easy Tolerance Calculation Calculate minimum, maximum, and average dimensions Enter a nominal dimension and view all tolerance limits instantly Results displayed clearly with color-coded indicators Copy results to clipboard with a single tap Powerful Search and Filtering Quick search for specific tolerance designations Filter by hole or shaft tolerances Recent searches history for faster access Customizable tolerance filter to show only designations you need Multi-unit Support View tolerances in millimeters (mm) Convert to inches (in) with proper precision Convert to micrometers (μm) for precision work User-Friendly Interface Intuitive navigation with tolerance table Clean, engineering-focused design Clear color coding: blue for holes, green for shafts Clickable cells for instant calculations Accessibility Features Dark mode support for low-light environments Responsive layout for phones and tablets Support for both portrait and landscape orientations Localization English and Russian language support International engineering symbols Professionally translated interface Perfect For Mechanical engineers CNC machinists Manufacturing technicians Quality control specialists Engineering students Technical designers Precision fabricators Tolerance Calculator is the essential pocket reference for anyone working with precision mechanical parts. Calculate proper fits and clearances accurately without the need for paper tables or complex formulas. Download now and simplify your engineering calculations!

About

CNC Lathe Calculator & Program

This tool assists CNC lathe operators and programmers by generating G-code and performing complex calculations. It offers various processing templates, thread calculations, and a wide range of engineering tools for efficient machining.

Highlights
  • G-code generation
  • Tangent point and arc calculations
  • Multiple processing templates
  • Thread and groove programming
  • Macro program conversion
  • Various engineering calculation tools
  • Favorites management
Features
Read full description

The CNC Lathe Calculator & Program is an efficiency tool tailored specifically for CNC lathe operators, machining practitioners, and CNC programmers. Core functions - Tangent point calculation, arc junction - G-code generation, absolute coordinates, relative coordinates - Multiple processing templates: external cylindrical machining, internal hole machining, contour machining - Macro program - Thread calculation, metric system, imperial system, American system - Groove programming, external circular groove, internal control groove, end face groove - Favorites management - Tool tip radius, offset - Result replication and export - Various calculation tools: trigonometric function conversion, triangle solving, diagonal calculation, material calculation, tolerance inquiry, linear velocity, feed rate, roughness, code inquiry, tool nose orientation - Convert macro program to G-code Applicable to - Front-line CNC lathe operators and programmers - Students majoring in Mechanical Manufacturing and Automation - Mechanical process designer and engineer If you have any questions about the app, or requests for features you would like to see, just write a short review or use the button inside the app to contact me. Get more support on https://www.whalesgrowth.top/support-cncl-en/ CNCL Pro Subscriptions You can subscribe for CNCL Pro Subscriptions to all features and content offered for purchase within the app. CNCL Pro offers subscriptions. The subscription prices are: (i) Yearly Subscription ($3.99 / Year) You can subscribe to a Yearly Subscription plan ($3.99 billed once a year). Payment will be charged to iTunes Account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. The prices are in US dollars. Pricing in other countries may vary and actual charges may be converted to your local currency depending on the country of residence. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Our app is functional without purchasing an Auto-Renewable subscription, and you can use all the unlocked content after the subscription expires. Q: How do I restore the subscriptions on new devices? A: You can tap the 'Restore' button on the subscription page. Privacy Policy: https://www.whalesgrowth.top/pp/ Terms of Service: https://www.whalesgrowth.top/tos/

Screenshots

Tolerance Helper4 screens
CNC Lathe Calculator & Program4 screens

Verdict

The call

The clearest difference is review sentiment: Tolerance Helper at 100% against CNC Lathe Calculator & Program's 40%. Tolerance Helper also leads on in-app purchases (none vs 6). CNC Lathe Calculator & Program's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, ads 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. CNC Lathe Calculator & Program sells 6 in-app purchases, starting at $3.99 per year. Tolerance Helper asks for nothing beyond the download.

UpkeepUpdate frequency

Tolerance Helper ships an update weekly, CNC Lathe Calculator & Program every 10 days. The most recent releases landed on September 26, 2026 and September 22, 2026 respectively.

Scorecard4 real differences · 6 level
Tolerance Helper versus CNC Lathe Calculator & Program: the parameters behind the verdict, then further details
ParameterTolerance HelperCNC Lathe Calculator & Program
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews100.0% of reviews — better40.0% of reviews
Number of ratings—2 — better
Update frequencyWeekly — betterEvery 10 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size21 MB24 MB
Age rating4+4+
DeveloperDmitriy Trofimov小玲 王

Customer experience

Tolerance Helper

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

CNC Lathe Calculator & Program

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive40.0%
Neutral10.0%
Negative50.0%

In-app purchases

None

Tolerance Helper

No in-app purchases

6 purchases

CNC Lathe Calculator & Program

Subscriptions1
  • CNCL Yearly Pro$3.991 Year
One-time5
  • CNCL Lifetime Pro$0.99
  • CNCL Lifetime Pro$1.99
  • CNCL Lifetime Pro$2.99
Show 2 more
  • CNCL Lifetime Pro$3.99
  • CNCL Lifetime Pro$4.99

Questions

Is Tolerance Helper free?
Tolerance Helper is free to download, with no in-app purchases.
Is CNC Lathe Calculator & Program free?
CNC Lathe Calculator & Program is free to download, with in-app purchases available.
Do Tolerance Helper or CNC Lathe Calculator & Program have ads?
Neither Tolerance Helper nor CNC Lathe Calculator & Program shows ads.
Which is updated more often, Tolerance Helper or CNC Lathe Calculator & Program?
Tolerance Helper ships an update weekly, and CNC Lathe Calculator & Program every 10 days. Most recently, Tolerance Helper was updated on September 26, 2026 and CNC Lathe Calculator & Program on September 22, 2026.

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