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ISO Tolerance

ISO Tolerance

Limits and Fits to ISO 286

1 ratings
5 reviews
📊 Productivity
🔍 Reference

Archived App (Last seen on 8 Apr 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • January 14, 2012
  • May 14, 2020

Features

Developer

superllanboy
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About

Calculate ISO hole and shaft tolerances based on nominal diameter and selected grade. Supports metric and imperial units, with additional functionality for linear dimensions, angles, and various geometric tolerances. Includes a limits and fits calculator.

✓ISO Hole Basis Tolerance charts
✓Metric and imperial unit support
✓Tolerance grade selection (A-ZC, a-zc)
✓ISO 2768 tolerances (linear, angles, etc.)
✓Limits and fits calculator
✓Clearance, transition, and interference fit visualization
Show original description

What's New in ISO Tolerance

3.0

May 14, 2020

Updated the App for IOS13 Added an ISO fits function, which allows users to conveniently check for clearance, transition or interference fits.

User reviews

Most RecentHighest RatedLowest Rated

Engineer

Been using this since it first released
Great little app
Love the new limits and fits
So much more convenient than the individual screens
Now only need to add GD&T and I’ll be thrilled
Recommend
LuckytulipLuckytulip

Useful

Great help for engineering tolerances
Saves having to look up tolerances in a Zeus book
Also has many many more tolerances than a Zeus book
Really useful
EubusbrowneEubusbrowne

Wrong hole tolerances

For a M3 M7 the ISO tolerance is +0.00-.012 not -.02-.012. This caused me problems
Jeff the iron legJeff the iron leg

Response from developer

The app data is correct for dimensions up to and including 3mm an M7 tolerance is -2,-12 for dimensions over 3 mm up to and including 6mm the tolerance is 0, -12 Sorry you encountered problems, but they were not caused by incorrect data in this app

Worthless, wasted a dollar

Not worth the data download cost, definitely not worth a dollar
KujodaddyKujodaddy

Well worth it for any machinist

Very straight forward, easy to use and accurate. Shows entered shaft or bore size with tolerance sizes.
JrmachJrmach

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FAQ

What is ISO Tolerance?

ISO Tolerance is a paid application designed to bring ISO Hole Basis Tolerance charts to your iPhone. It helps users calculate upper and lower tolerances for holes and shafts based on nominal diameter and selected tolerance grades.

What is the price of ISO Tolerance?

ISO Tolerance is a paid application, priced at $0.99. This one-time purchase grants you access to all its features.

Does ISO Tolerance support both metric and imperial units?

Yes, ISO Tolerance supports both metric and imperial units. It calculates tolerances for nominal diameters between 0 and 500 mm in metric mode, and 0 to 19.685 inches in imperial mode.

What types of ISO 2768 tolerances can ISO Tolerance calculate?

ISO Tolerance can calculate tolerances for Linear dimensions, Chamfers and Radii, Angles, Straightness, Flatness, Perpendicularity, Symmetry, and run out as defined in ISO 2768 table 1 and table 2.

Is ISO Tolerance available on Android devices?

Based on the provided data, ISO Tolerance is currently only supported on iPhone and iPod devices. There is no information indicating Android compatibility.

How frequently is ISO Tolerance updated?

The latest version of ISO Tolerance is 3.0, which was last updated on May 14, 2020. The update frequency can vary, but this indicates a recent update.

Does ISO Tolerance have ads?

No, ISO Tolerance does not contain advertisements. The application is ad-free, allowing for an uninterrupted user experience.

What is the age rating for ISO Tolerance?

ISO Tolerance has an age rating of 4+, making it suitable for a wide range of users, including younger individuals who may be learning about engineering concepts.