# TransFix vs Tolerance Helper

The clearest difference is update cadence: Tolerance Helper at weekly against TransFix's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TransFix ships an update every 6 weeks, Tolerance Helper weekly. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | TransFix | Tolerance Helper |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 42 MB | 21 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Krupnov](https://appshunter.io/developer/1690333291) | [Dmitriy Trofimov](https://appshunter.io/developer/1598378710) |

## What reviewers say

### TransFix

[App page](https://appshunter.io/ios/app/transfix/id6449734899)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Tolerance Helper

[App page](https://appshunter.io/ios/app/tolerance-helper/id6745212628)

This engineering reference tool simplifies calculating ISO standard tolerances for mechanical design and manufacturing. It provides instant calculations for hole and shaft dimensions, with support for multiple units and a user-friendly interface.

**Highlights:** ISO tolerance calculations for holes and shafts, Complete engineering tolerance reference table, Minimum, maximum, and average dimension calculations, Multi-unit support (mm, inches, micrometers), Powerful search and filtering of designations, User-friendly interface with color-coded indicators, Dark mode support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TransFix free?

TransFix is free to download, with no in-app purchases.

### Is Tolerance Helper free?

Tolerance Helper is free to download, with no in-app purchases.

### Do TransFix or Tolerance Helper have ads?

Neither TransFix nor Tolerance Helper shows ads.

### Which is updated more often, TransFix or Tolerance Helper?

TransFix ships an update every 6 weeks, and Tolerance Helper weekly. Most recently, TransFix was updated on October 17, 2026 and Tolerance Helper on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*