# ISO Fits vs instaRAL

The clearest difference is in-app purchases: instaRAL at none against ISO Fits's 1. ISO Fits's advantage is iOS requirement (15.6 vs 26.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | ISO Fits | instaRAL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (6 ratings)](https://appshunter.io/ios/app/iso-fits/id396863755/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 94.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 66 MB | 7 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Fatih Akbyk](https://appshunter.io/developer/1886242631) |

## 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 |


### instaRAL

[App page](https://appshunter.io/ios/app/instaral/id6760793193)

**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 instaRAL free?

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

### Do ISO Fits or instaRAL have ads?

Neither ISO Fits nor instaRAL shows ads.

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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.*