# ISO Fits vs MechTab

The clearest difference is in-app purchases: MechTab at none against ISO Fits's 1. On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. ISO Fits sells 1 one-off in-app purchase. MechTab asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.2 for ISO Fits against 4.1 for MechTab. Both are backed by a comparable volume of ratings — 6 and 16 respectively. Written reviews are what separate them: 95% of ISO Fits's written reviews are positive against 89% of MechTab's.

ISO Fits ships an update every 5 months, MechTab every 9 months. The most recent releases landed on September 12, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ISO Fits | MechTab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (6 ratings)](https://appshunter.io/ios/app/iso-fits/id396863755/reviews)** | [4.1 (16 ratings)](https://appshunter.io/ios/app/mechtab/id553201101/reviews) |
| Number of ratings | 6 | **16** |
| Positive reviews | **94.6% of reviews** | 88.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 9 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 66 MB | 9 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Werder AG](https://appshunter.io/developer/553201104) |

## What reviewers say

### ISO Fits

[App page](https://appshunter.io/ios/app/iso-fits/id396863755)

Calculate ISO fits and tolerances for shafts and bores. Supports metric and inch units, displays detailed fit definitions, and includes visual charts and educational videos.

**Highlights:** ISO fits calculation, Tolerance class display, Metric/inch unit switching, Tolerance charts, Updated YouTube videos

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version with complete ISO286 Standard | $1.99 | one-time |


### MechTab

[App page](https://appshunter.io/ios/app/mechtab/id553201101)

This app offers a comprehensive set of tools for mechanics, providing essential data on tolerances, threads, cutting speeds, wrench sizes, and roughness. It also includes calculators for material weight, triangle properties, and trowalisation.

**Highlights:** ISO-Tolerance data (holes and shafts), Thread specifications, Cutting data calculations, Wrench size conversions, Roughness parameters, Material weight calculator, Triangle property calculator

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

**In-app purchases:** none


## Frequently asked questions

### Is ISO Fits free?

ISO Fits is free to download, with in-app purchases available.

### Is MechTab free?

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

### Which has better reviews, ISO Fits or MechTab?

ISO Fits is rated higher. ISO Fits averages 4.2 out of 5 from 6 ratings, while MechTab averages 4.1 from 16 ratings.

### Do ISO Fits or MechTab have ads?

Neither ISO Fits nor MechTab shows ads.

### Which is updated more often, ISO Fits or MechTab?

ISO Fits ships an update every 5 months, and MechTab every 9 months. Most recently, ISO Fits was updated on September 12, 2026 and MechTab on September 15, 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.*