# Turner Tools: Lathe Calculator — Tapers, threads & shop notes

> Tapers, threads & shop notes (iPhone/iPad app by DY Mobile.)

- Source: https://appshunter.io/ios/app/turner-tools-lathe-calculator/id6824912262 (this page in markdown: same URL + `.md`)
- Developer: [DY Mobile](https://appshunter.io/developer/1643267703)
- Category: Utilities, Developer Tools
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 3 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-10-22
- Data updated: 2026-10-26

## What is Turner Tools?

Keep everyday lathe calculations, reference tables and program templates close at hand. Turner Tools offers 56 tools across 10 categories for CNC and conventional lathe work

DIMENSIONS AND CONTOURS
Calculate tapers, angles, arcs, fillets and tangencies with diagrams and multiple geometric solutions. Mirror or translate coordinates, and display X diameter values or radial r values.

MATERIALS AND CUTTING
Find starting cutting parameters by material, tooling and operation, then transfer them to related calculations. Calculate spindle speed, cutting speed, feed and machining time. Plan roughing depths and finishing allowance, and estimate material weight.

THREADS AND FITS
Look up supported metric, trapezoidal and pipe thread dimensions, with cutting and forming tap drill references. Calculate supported hole and shaft tolerances and fits, and inspect clearance or interference on a tolerance diagram.

HARDNESS AND TOOL NOSES
Convert approximately between HRC, HV and HBW within the supported steel range. Check tool nose compensation references for supported geometry and tip orientations, with radial and diameter quantities clearly distinguished.

PROGRAMS AND PATHS
Generate FANUC reference programs and macro templates, including face groove operations. View XZ path diagrams and step through supported programs to help check the machining sequence.

KEEP YOUR WORK
• Keep tool inputs automatically; undo, redo and review parameter changes.
• Save results with part and operation notes, then restore inputs to continue.
• Check measured sizes and calculate trial-cut diameter corrections.
• Manage machine profiles and export or import local JSON backups.
• Adjust themes, text size and numeric precision.

FREE USE AND PRO
Get 5 successful calculations per day, resetting at local midnight. Program generation counts toward this allowance. Thread lookup, tapping drill tables and G-code lookup are unlimited. Invalid inputs do not count; copying or saving an existing result does not use another calculation.

Choose monthly Pro or a one-time Lifetime Pro purchase for unlimited calculations and program generation. Previous paid app owners retain Lifetime Pro after Apple verifies their original purchase. Restore purchases from within the app.

Calculations and built-in references run on your device without an app account. Purchases, restoration, product loading and entitlement verification use Apple services. Verified access works offline while valid.

SUBSCRIPTION DETAILS
Monthly Pro renews automatically each month and is billed to your Apple Account. The purchase screen and Apple confirmation show the price, period and trial eligibility. If offered, a free trial converts to a paid subscription when it ends. Cancel at least 24 hours before the trial or current subscription period ends to avoid renewal. Manage or cancel in your Apple Account subscription settings. Cancellation preserves access through the paid period. Lifetime Pro is a one-time purchase.

Calculations, standard approximations and program templates assist verification. Material parameters, hardness conversions and tap drill values depend on actual conditions. Path diagrams do not replace machine simulation. Check drawings, applicable standards, machine instructions and tooling; simulate and perform a trial cut before machining.

Support: turnertool@163.com
Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro monthly | $0.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro — Lifetime | $2.99 | one-time |


## Is Turner Tools safe?

Not enough ratings yet to assess Turner Tools.

## Is Turner Tools legit?

Turner Tools: Lathe Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Turner Tools is 70 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.2 — 2026-10-25

The toolbox grows to 56 tools, with updated calculations and program previews.
• Added material cutting parameters, hole and shaft fits, thread lookup, tapping drill tables, hardness conversion, tool nose compensation references and face groove programming.
• Transfer material parameters and hole tolerance deviations to related calculations to reduce repeated entry.
• View XZ path diagrams and step through supported FANUC reference programs.
• Updated calculation and program buttons with a clearer daily allowance.

### 1.1 — 2026-10-23

• Added material cutting parameters, hole and shaft fits, thread lookup, tapping drill tables, hardness conversion, tool nose compensation references and face groove programming.
• Transfer material parameters and hole tolerance deviations to related calculations to reduce repeated entry.
• View XZ path diagrams and step through supported programs in a unified results view.
• Updated calculation and program buttons with a clear daily allowance.
• Get 5 successful calculations free each day. Thread, tapping and G-code lookups remain unlimited.

### 1.0 — 2026-10-23

No release notes.

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All apps by DY Mobile: https://appshunter.io/developer/1643267703

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*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 2026-10-26.*