112+ iOS apps curated and reviewed
The best flange hole marker pro apps on iPhone average 3.9★ across 112+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | $2.99 | — | No | No | Aug 2026 |
| 2 |  | $1.99 | — | No | No | Aug 2026 |
| 3 |  | Free | 5.0★ (1) | No | Yes | Aug 2026 |
| 4 |  | $3.99 | 5.0★ (1) | No | No | Jul 2026 |
| 5 |  | Free | 2.5★ (2) | No | No | Aug 2026 |
| 6 |  | Free | 5.0★ (13) | No | No | Jul 2026 |
| 7 |  | Free | 1.0★ (2) | No | No | May 2026 |
| 8 |  | Free | 4.3★ (39) | No | No | Aug 2026 |
Calculate precise flange hole markings for equispaced holes, angles, and equivalent hole counts. Supports both millimeters and inches for various fabrication and engineering applications.
Calculate the cord length needed to mark holes on a flange's pitch circle diameter. Ideal for fabrication professionals, this tool simplifies bolt hole marking on various industrial equipment.
This engineering tool simplifies flange hole layout for professionals. It offers three calculators for accurate marking of equispaced, angled, or equivalent holes, saving time and reducing errors in fabrication and machining. Works offline.
This engineering tool accurately calculates and marks bolt hole positions on flanges for machinists and fabricators. It offers features for equispaced, angle-based, and equivalent hole counts, saving time and reducing manual errors in workshop settings.
Easily save and share your current location or specific points of interest. Ideal for marking spots in fields, repair needs, or hard-to-find areas. Locations can be shared via email for import on other devices.
Access essential measurements and dimensional data for API 6A integral flanges. This tool provides quick access to critical specifications for engineering and industrial applications.
This business app provides industrial flanges for various industries, offering calculations and industry news. It connects users through social networks and offers a wide range of flange types and sizes.
Access dimensional and weight data for over 70 common ASME piping components. Provides information in Metric, US Customary Units, and Inch/Fractions, with audited weights for valves, flanges, and other parts. Ensures accuracy and up-to-date information based on the latest ASME specifications.
Organize your favorite places with custom markers, descriptions, and photos. Create folders, search for locations, and even measure distances and areas. Collaborate with friends and sync your maps across devices.
This application provides a digital slide rule for finding critical dimensions of high-pressure wellhead equipment, including integral flange and ring groove measurements. It functions like a traditional paper slide rule, offering convenience and accessibility for users needing these specific engineering calculations.
This utility app enables WIFI communication between a handheld device and a Patmark pin marker. It allows users to easily input text and initiate marking operations.
This app calculates various oilfield volumes, including hole, annular, tubing, and displacement. Users input depth, casing, and tubing sizes to get quick results. It supports both metric and standard units and allows for custom pipe sizes.
Instantly access flange, pipe, and bolt data offline. Quickly find bolt sizes, torque patterns, flange dimensions, and pipe specifications. Ideal for pipefitters and steamfitters needing rapid access to piping information.
This mobile application helps plan and report on drilling projects, reducing risk and improving efficiency. It allows users to map bore paths, record waypoints, and identify obstacles, replacing traditional paper methods with GPS technology.
Streamline on-site data collection and reporting with real-time geolocation and map overlays. Document issues, create automated reports, and collaborate with stakeholders instantly. Works offline for remote locations.
This navigation app allows GPS users to mark and save locations with custom shapes and radii. Saved locations are accessible through your GPS client account, functioning both online and offline.