# Fit Tolerance ISO Pro — Fits and Tolerances Calculator > Engineering calculator for fits and tolerances based on ISO and ANSI standards. (iPhone/iPad app by Yasar Yucel Yesilbag.) - Source: https://appshunter.io/ios/app/fit-tolerance-iso-pro/id1397159146 (this page in markdown: same URL + `.md`) - Developer: [Yasar Yucel Yesilbag](https://appshunter.io/developer/1251895011) - Category: Utilities, Productivity - Price: $0.99 - Rating: 5.00/5 from 1 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 47 MB - Released: 2018-07-23 - Data updated: 2026-08-14 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/fit-tolerance-iso-pro/id1397159146/reviews.md ## What is Fit Tolerance ISO Pro? Limits, fits and tolerances calculator has been developed to calculate engineering tolerances of inner and outer features of journal bearings, linear bearings, thrust bearings, bushings, ball bearings, roller bearings, housings, cylinder bores, drilled holes, linear and precision shafts, pistons, etc. The calculator works in line with ISO 286-1 (2010), ISO 286-2 (2010) and ANSI B4.2 (1978) standards which are based on metric units. According to the input parameters of nominal size and hole/shaft tolerances, size limits and deviations for hole/shaft are calculated and fit type is selected among the clearance, transition and interference fits. The schematic representation of the fit is also drawn. The preferred tolerances and fits advised by ISO and ANSI standards can be found in the "Supplements" section. ## Key features - Calculate engineering tolerances - Supports ISO and ANSI standards - Determines clearance, transition, and interference fits - Provides schematic fit representations - Includes preferred tolerances and fits - Calculates size limits and deviations ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/fit-tolerance-iso-pro/id1397159146/reviews.md ### 5/5 — Excellent Customer Support *2026-05-18* On a recent update, the app lost the function to be able to input microns. When entering the basic size, I used to be able to enter a decimal point. That functionality was restored promptly by the apps creator after o reached out. As a design engineer, this is great for quickly checking fits. **Developer response:** Hello, v3.0 update has solved this issue. ### 3/5 — Lost the Decimal Function *2025-12-12* On a recent update, the app lost the function to be able to input microns. When entering the basic size, I used to be able to enter a decimal point. Can that function be restored? I’m using an iPhone 13 with IOS 18.6 software. This would change my review to 5 stars. **Developer response:** Hello, v3.0 update has solved this issue. ## Frequently asked questions about Fit Tolerance ISO Pro ### What is Fit Tolerance ISO Pro used for? Fit Tolerance ISO Pro is used to calculate engineering tolerances for inner and outer features of various mechanical components such as bearings, shafts, and housings. It helps determine size limits, deviations, and the type of fit (clearance, transition, or interference). ### What standards does Fit Tolerance ISO Pro follow? The calculator adheres to the ISO 286-1 (2010), ISO 286-2 (2010), and ANSI B4.2 (1978) standards, which are based on metric units. This ensures accurate calculations according to established engineering practices. ### What types of fits can Fit Tolerance ISO Pro calculate? Fit Tolerance ISO Pro can calculate clearance fits, transition fits, and interference fits. It provides the necessary data to select the appropriate fit type based on the nominal size and specified tolerances. ### Does Fit Tolerance ISO Pro offer visual representations? Yes, Fit Tolerance ISO Pro includes a schematic representation of the calculated fit. This visual aid helps users better understand the relationship between the mating parts. ### Where can I find preferred tolerances in Fit Tolerance ISO Pro? The "Supplements" section within Fit Tolerance ISO Pro provides access to preferred tolerances and fits as advised by ISO and ANSI standards. This is a valuable resource for selecting standard and optimal fit combinations. ### What devices is Fit Tolerance ISO Pro available on? Fit Tolerance ISO Pro is available on iPhone, iPad, and iPod devices. It is designed for users who need to perform these calculations on the go. ### How often is Fit Tolerance ISO Pro updated? The last update for Fit Tolerance ISO Pro was on January 15, 2026, with the latest version being 3.0. This indicates ongoing development and support for the application. ### What is the price of Fit Tolerance ISO Pro? Fit Tolerance ISO Pro is a paid application, available for $0.99. This one-time purchase grants access to all its features for calculating engineering fits and tolerances. ## Version history (last 5 releases) ### 3.0 — 2026-01-15 On screen keyboard for nominal size is now a numpad with a decimal separator. Minor updates and improvements. ### 2.2 — 2025-12-15 On screen keyboard for nominal size switched to alphanumeric to enable user to input decimal separator. ### 2.1 — 2025-12-03 UI is modernized. Minor updates and improvements. ### 1.5 — 2023-11-06 Bug fixes and performance improvements. ### 1.4 — 2022-05-07 Minor updates and improvements. ## Apps similar to Fit Tolerance ISO Pro | App | Rating | Price | Category | | --- | --- | --- | --- | | [Simple Pendulum Calculator](https://appshunter.io/ios/app/simple-pendulum-calculator/id1397285555) | 5.0 (1) | $2.99 | Utilities | | [Fit Tolerance Calculator](https://appshunter.io/ios/app/fit-tolerance-calculator/id1448302769) | 5.0 (5) | $2.99 | Utilities | | [BoltCalcSimple](https://appshunter.io/ios/app/boltcalcsimple/id6747013276) | 5.0 (4) | Free | Utilities | | [CaseFlip](https://appshunter.io/ios/app/caseflip/id6740148305) | 5.0 (1) | Free | Utilities | | [Unit Converter All-In-One Eng+](https://appshunter.io/ios/app/unit-converter-all-in-one-eng-plus/id600768319) | 2.6 (5) | $0.99 | Utilities | | [Mechanical Toolkit](https://appshunter.io/ios/app/mechanical-toolkit/id6480299808) | — | Free | Utilities | ## More apps by Yasar Yucel Yesilbag - [Fit Tolerance ISO](https://appshunter.io/ios/app/fit-tolerance-iso/id1251895012) - [Fit Tolerance ANSI](https://appshunter.io/ios/app/fit-tolerance-ansi/id1294112198) - [Bemazer](https://appshunter.io/ios/app/bemazer/id1454370304) - [Brick Miner](https://appshunter.io/ios/app/brick-miner/id1516095657) All apps by Yasar Yucel Yesilbag: https://appshunter.io/developer/1251895011 --- *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 2026-08-14.*