# ISO Fits vs Staalprofielen

The clearest difference is in-app purchases: Staalprofielen at none against ISO Fits's 1. ISO Fits's advantage is update cadence (every 5 months vs every 40 months) and ratings volume (6 vs 1). On price, rating, ads and device support there is nothing between them.

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

ISO Fits holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: ISO Fits has 6 ratings behind it against 1, so its average is the more settled of the two.

ISO Fits ships an update every 5 months, Staalprofielen every 40 months. The most recent releases landed on October 23, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | ISO Fits | Staalprofielen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (6 ratings)](https://appshunter.io/ios/app/iso-fits/id396863755/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/staalprofielen/id715625501/reviews) |
| Number of ratings | **6** | 1 |
| Positive reviews | 94.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 40 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 66 MB | 55 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Bouwen met Staal](https://appshunter.io/developer/1347813215) |

## 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 |


### Staalprofielen

[App page](https://appshunter.io/ios/app/staalprofielen/id715625501)

Access a comprehensive catalog of steel profiles, including dimensions and steel grades available in stock or with short delivery times. Key technical data for various steel types is also provided.

**Highlights:** Stock program of steel traders, Available dimensions and steel grades, Delivery within three working days, Key technical data, Catalog of various steel profiles, Reinforcing steel information

**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 Staalprofielen free?

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

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

ISO Fits is rated higher. ISO Fits averages 4.2 out of 5 from 6 ratings, while Staalprofielen averages 4.0 from 1 ratings.

### Do ISO Fits or Staalprofielen have ads?

Neither ISO Fits nor Staalprofielen shows ads.

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

ISO Fits ships an update every 5 months, and Staalprofielen every 40 months. Most recently, ISO Fits was updated on October 23, 2026 and Staalprofielen on October 16, 2026.

---

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