# Tolerance Helper vs CNC Lathe Calculator & Program

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). On price, update cadence, ads and device support there is nothing between them.

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.

Tolerance Helper ships an update weekly, CNC Lathe Calculator & Program every 10 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | Tolerance Helper | CNC Lathe Calculator & Program |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cnc-lathe-calculator-and-program/id6758656996/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | **100.0% of reviews** | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | **Free** | Freemium |
| Size | 21 MB | 23 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Trofimov](https://appshunter.io/developer/1598378710) | [小玲 王](https://appshunter.io/developer/1573722736) |

## What reviewers say

### Tolerance Helper

[App page](https://appshunter.io/ios/app/tolerance-helper/id6745212628)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### CNC Lathe Calculator & Program

[App page](https://appshunter.io/ios/app/cnc-lathe-calculator-and-program/id6758656996)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CNCL Yearly Pro | $3.99 | per year |
| CNCL Lifetime Pro | $0.99 | one-time |
| CNCL Lifetime Pro | $1.99 | one-time |
| CNCL Lifetime Pro | $2.99 | one-time |
| CNCL Lifetime Pro | $3.99 | one-time |
| CNCL Lifetime Pro | $4.99 | one-time |


## Frequently asked 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 October 28, 2026 and CNC Lathe Calculator & Program on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*