# ISO Fits vs GATEWatch Counter

The clearest difference is in-app purchases: GATEWatch Counter at none against ISO Fits's 1. On price, update cadence, ads and device support there is nothing between them.

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

ISO Fits ships an update every 5 months, GATEWatch Counter every 3 months. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | ISO Fits | GATEWatch Counter |
| --- | --- | --- |
| 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 | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 66 MB | 18 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) | [Volker Lehnen](https://appshunter.io/developer/1528760360) |

## 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 |


### GATEWatch Counter

[App page](https://appshunter.io/ios/app/gatewatch-counter/id1533413615)

**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 GATEWatch Counter free?

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

### Do ISO Fits or GATEWatch Counter have ads?

Neither ISO Fits nor GATEWatch Counter shows ads.

### Which is updated more often, ISO Fits or GATEWatch Counter?

ISO Fits ships an update every 5 months, and GATEWatch Counter every 3 months. Most recently, ISO Fits was updated on October 23, 2026 and GATEWatch Counter on October 21, 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.*