# Bolt Circle XY — PCD Coordinates & Chords

> PCD Coordinates & Chords (iPhone/iPad app by 文仲 张.)

- Source: https://appshunter.io/ios/app/bolt-circle-xy/id6793188175 (this page in markdown: same URL + `.md`)
- Developer: [文仲 张](https://appshunter.io/developer/6788944921)
- Category: Utilities, Productivity
- Price: $2.99
- Age rating: 4+
- Requires: iOS 17.0 · 0 MB
- Languages: American English
- Released: 2026-08-07
- Data updated: 2026-08-11
- User reviews in markdown: https://appshunter.io/ios/app/bolt-circle-xy/id6793188175/reviews.md

## What is Bolt Circle XY?

Get the X/Y coordinates for every hole in a bolt-circle pattern without building a spreadsheet or trusting a sketch.

Enter the pitch-circle diameter, hole count and start angle. Bolt Circle XY immediately calculates a clean coordinate table for layout, setup and double-checking at the machine.

BUILT FOR THE JOB AT HAND

• Absolute X/Y coordinates
• Incremental ΔX/ΔY moves
• Clockwise or counterclockwise numbering
• Adjustable start angle
• Center X/Y offsets
• Inch and millimeter units
• Adjacent and skip-one chord checks
• Copyable coordinate table
• Local recent setups
• Visual pattern preview

PRIVATE AND DEPENDABLE

No account. No ads. No tracking. No network connection. Your saved setups remain on your device.

Bolt Circle XY does not generate machine code. Always verify units, zero location, tool diameter and the physical setup before drilling or machining.

One paid download. No subscription and no in-app purchases.


## Version history (last 1 release)

### 1.0 — 2026-08-07

No release notes.

## More apps by 文仲 张

- [Fixed Gear Skid Calculator](https://appshunter.io/ios/app/fixed-gear-skid-calculator/id6793187875)

All apps by 文仲 张: https://appshunter.io/developer/6788944921

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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 2026-08-11.*