# ISO Tolerance — user reviews

> 5 indexed App Store user reviews of ISO Tolerance by superllanboy, rated 5.00/5 from 1 ratings.

- Source: https://appshunter.io/ios/app/iso-tolerance/id493852664/reviews
- App overview in markdown: https://appshunter.io/ios/app/iso-tolerance/id493852664.md
- Rating breakdown: 5★ 1 · 4★ 0 · 3★ 0 · 2★ 0 · 1★ 0

## Most critical reviews (5 lowest-rated)

### 1/5 — Worthless, wasted a dollar

*2016-10-27*

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

### 2/5 — Wrong hole tolerances

*2017-07-22*

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

**Developer response:** 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

### 5/5 — Engineer

*2020-05-15, version 3.0*

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

### 5/5 — Useful

*2017-09-03, version 2.0*

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

### 5/5 — Well worth it for any machinist

*2012-07-04*

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

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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 2026-06-10.*