ShopCalc: Machinist Calculator
Machinist Feeds, Speeds & Tap
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
The machinist calculator your shop uses every day — speeds and feeds, tap drill, threading, and conversational G-code, all offline.
Stop guessing your speeds and feeds. Stop hunting for the tap drill chart on a greasy notebook page. Stop typing G-code by hand for simple ops. ShopCalc puts every machinist calculation a tap or two away — fully offline, no account, no ads.
WHAT'S INSIDE
• Speeds & Feeds — RPM, SFM, IPM, IPR for any tool, any material
• Tap Drill — UNC, UNF, metric, full chart with class fits
• Threading — single-point thread cutting (60° UN, ISO metric, ACME)
• Drilling — peck schedules, point lengths, blind-hole depths
• Drill Chart — number, letter, fractional, metric — all sizes side-by-side
• Boring & Reaming — finish allowance and feed corrections
• G-Code Generators — facing, threading, drilling, simple OD/ID
• Bolt Circle Generator — XY points + canned cycle for any pattern
• Lathe Jaw Bore — soft-jaw boring cycles with spring-pass option
• G-Code Reference — quick lookup for G/M codes and program structure
• Conversions — feed/speed unit conversions, taper math
• Metal Weight — bar stock, plate, tube, by material and shape
• Surface Finish — Ra ↔ Rz, common roughness conversions
• Tool Library — save your shop's tools, pull settings instantly
• Reference — material hardness, common tap sizes, common drill sizes
WHO IT'S FOR
Manual machinists, CNC operators, programmers, apprentices, hobbyists. If you spend any time at a lathe, mill, or VMC, ShopCalc earns its place on your phone in the first week.
FREE vs PRO
Free forever: speeds & feeds, tap drill, threading, conversions, drill chart, G-code reference.
Pro unlocks G-code generators, bolt circle, jaw bore, tool library, metal weight, surface finish, and the full reference set. One-time purchase or subscription.
Subscriptions auto-renew until cancelled. Manage in your Apple ID Subscription Settings.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://doublevision.company/privacy
NO ACCOUNT. NO ADS. NO DATA COLLECTION.
ShopCalc works on the floor, in the cab, in a shielded plant. Everything runs locally.
New: pick your machine (Haas, Fanuc, LinuxCNC, GRBL, lathes and more) and G-code output is formatted for that control — correct tapping cycles, dwell format, and retract behavior per machine. Plus paywall display fixes on iPad and in dark mode.
The developer, Double Vision USA LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Double Vision USA LLC
- Size
- 1.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Machine Shop Bundle $499.99
- ShopCalc Pro Yearly $19.99
- ShopCalc Pro Monthly $4.99
- ShopCalc Pro $99.99
- Copyright
- © 2026 Double Vision USA LLC
