# IAP Bushings & Tubes Reference > Reference app for pen kit specifications, drill bit conversions, and penturning resources. (iPhone/iPad app by penturners.org LLC.) - Source: https://appshunter.io/ios/app/iap-bushings-and-tubes-reference/id1062399336 (this page in markdown: same URL + `.md`) - Developer: [penturners.org LLC](https://appshunter.io/developer/1062399335) - Category: Reference, Utilities - Price: $0.99 - Rating: 4.50/5 from 17 App Store ratings · 17 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 27 MB - Languages: American English - Released: 2015-12-08 - Data updated: 2026-08-15 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/iap-bushings-and-tubes-reference/id1062399336/reviews.md ## What is IAP Bushings & Tubes Reference? The IAP Bushings & Tubes app provides a searchable and sortable interface to over 4000 pen kits from most of the major kit suppliers. The app displays detailed tube and bushing specifications and drill bit requirements for every kit in the app database. These kit details can be emailed or printed via Air Print. You can create a favorites list of your most frequently used kits for faster access to those kits rather than searching through the entire app database every time you need to reference those kits. You can also reorder the database by your preferred supplier order. A User Notes feature allows you to enter personal notes about any kit in the database. No limits are imposed on the size of your notes and they can contain punctuation characters, line feed characters, and new line characters. Your notes will be included when you print or email kit information. You can also print, export, or share individual notes or generate and share a CSV file containing all your notes. The app also includes a drill bit converter for converting between inch fractional, inch decimal, metric and gauge drill sizes. Conversions to inch fractional are made to the nearest 1/64" and conversions to gauge drill size are made to the nearest gauge drill size (107-1 and A-Z). An error factor is displayed for inexact conversions to inch fractional and gauge drill size. A 30-digit, 4-function calculator is included in the app. It has several advanced features not found in many simple calculators including a memory cell and the ability to display data in decimal or scientific notation. Photos, Instructions and Bushing Drawings are available for most of the kits. When instructions or bushings are available, they may be viewed, mailed or printed. The app also contains several lists of useful references: Worldwide Suppliers of pen kits with links to take you directly to their web site; Helpful Penturning videos with links that will take you directly to the video; and Penturning Tutorials with links that will download the tutorial to your device for viewing in the app or to email or print. The app will automatically download database updates and the kit reference files from the IAP server. ## Key features - Searchable pen kit database - Detailed tube and bushing specs - Drill bit requirements - Favorites list - User notes feature - Drill bit converter - 4-function calculator ## Chart rankings - #196 in Top Paid · Reference (US App Store) ## Recent user reviews (10 of 17) All indexed reviews: https://appshunter.io/ios/app/iap-bushings-and-tubes-reference/id1062399336/reviews.md ### 5/5 — Great App *2024-03-17, version 1.17* The only thing: I wish I could enlarge. Bad eye sight. ### 1/5 — Does not cover kits purchased in uk *2023-08-09* Does not mention pen kits sourced in uk ### 4/5 — Useful reference across suppliers *2023-07-31, version 1.16* Great to have access to the all the set documents in one place. To the previous reviewer… turn the iPad physically to Portrait view, and the docs will appear fine. ### 5/5 — Great app for pen turning *2023-04-25* Awesome app. Tons of reference info and data. Printable instructions for any pen project. A must have if you make pens ! ### 3/5 — Great on iPhone, not so much on iPad *2023-01-19, version 1.14* I realy like the functionalities and practicality of this app. Unfortunately, I can only view the instructions when using my iPhone, on my 2 different iPads, all I get are blank pages. A real bummer since my iPad is my main shop device. ### 5/5 — Must have *2022-10-29, version 1.14* This is a must have app for anyone who loves penturning! You’ll have a wealth of information at your fingertips. It is updated on a regular basis and gets better every time! Thanks for all the hard work! ### 5/5 — Great App *2022-10-18, version 1.13* Every penturner should have this great app. Almost every pen kit instruction is at your fingertips. ### 2/5 — Handy but… *2021-07-16, version 1.07* A handy app but in DIRE need of an update. ### 2/5 — Needs updating *2020-07-28, version 1.07* It’s been a while since the app data base has been updated, so it is missing the newer kits. As well as the default screen doesn’t let you scroll up to get access to the sort feature, so the only way to search the kits is to type and search by name or to scroll. ### 4/5 — Great app *2020-01-27, version 1.07* For what it does, but the database hasn’t been updated in ages. A lot of the newer pen kits are not in it, so it limits its usefulness. ## Frequently asked questions about IAP Bushings & Tubes Reference ### What is IAP Bushings & Tubes Reference? IAP Bushings & Tubes Reference is a mobile application designed to provide detailed specifications for over 4000 pen kits from major suppliers. It includes information on tubes, bushings, drill bit requirements, and helpful penturning resources. ### How many pen kits are included in IAP Bushings & Tubes Reference? The app database contains specifications for over 4000 pen kits from most of the major kit suppliers. ### Can I save my frequently used pen kits in IAP Bushings & Tubes Reference? Yes, you can create a favorites list of your most frequently used kits for faster access, rather than searching the entire database each time. ### Does IAP Bushings & Tubes Reference have a drill bit converter? Yes, the app includes a drill bit converter that can convert between inch fractional, inch decimal, metric, and gauge drill sizes, displaying error factors for inexact conversions. ### What are the system requirements for IAP Bushings & Tubes Reference? IAP Bushings & Tubes Reference is available for iPhone, iPad, and iPod. It is rated for ages 4 and up. ### How often is the database updated in IAP Bushings & Tubes Reference? The app automatically downloads database updates and kit reference files from the IAP server. The last update was on August 10, 2023. ### What is the price of IAP Bushings & Tubes Reference? IAP Bushings & Tubes Reference is a paid application, priced at $0.99. ### Does IAP Bushings & Tubes Reference have ads? No, IAP Bushings & Tubes Reference does not contain advertisements. ## Version history (last 5 releases) ### 1.17 — 2023-08-10 Added a User Notes feature so users can enter notes about any kit in the database and share, print, or export them to other apps. Added a Preferences Button to the Main Kit Listing page to rapidly navigate to the BushNTubes preferences in the Setting App. Made several UI improvements. ### 1.16 — 2023-07-23 Added several new features: Searches can now be performed on strings as well as individual words or numbers A Bushing Inventory csv file can be generated from the Favorites listing Discontinued kits are now displayed in a different user-defined color Background colors of some displays can be changed Added a Drill Bit Equivalences chart to the Drill Bit Converter Display Kit info can now be displayed from the Detail page in addition to the main page Made several UI improvements. Updated the User Guide with the new features ### 1.15 — 2023-06-26 Several UI Improvements: * Added photo thumbnails to kits that have photos available * Added an indexing feature to sorted pen lists * Added an English/Metric Switch to the Pen Detail Page ### 1.14 — 2022-10-26 Added a list of helpful penturning videos with links to take you directly to the video for viewing on your device. Added a list of penturning tutorials with links that will download the tutorials to your device for viewing, emailing, or printing. Added buttons to make it easy to Share the App and Leave a Review for it. Made several user interface improvements. Updated the User Guide. ### 1.13 — 2022-10-11 Added a new supplier listing feature. Several UI improvements. Some bug fixes. 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