# ISO Fits vs Nasaq

The clearest difference is update cadence: Nasaq at weekly against ISO Fits's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ISO Fits sells 1 one-off in-app purchase and Nasaq sells 5 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ISO Fits ships an update every 5 months, Nasaq weekly. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ISO Fits | Nasaq |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 66 MB | 101 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [MOHAMMED ALGHAMMAS](https://appshunter.io/developer/1887748567) |

## 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 |


### Nasaq

[App page](https://appshunter.io/ios/app/nasaq/id6761090407)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nasaq Testing-En | $0.99 | per 7 days |
| Nasaq-En | $4.99 | per 7 days |
| Nasaq-En | $11.99 | per 7 days |
| Nasaq-En | $199.99 | per year |
| Nasaq-En | $499.99 | per year |


## Frequently asked questions

### Is ISO Fits free?

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

### Is Nasaq free?

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

### Do ISO Fits or Nasaq have ads?

Neither ISO Fits nor Nasaq shows ads.

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

ISO Fits ships an update every 5 months, and Nasaq weekly. Most recently, ISO Fits was updated on October 23, 2026 and Nasaq on October 25, 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.*