# Fit Tolerance ISO vs Phynitty

The clearest difference is ads: Phynitty at none against Fit Tolerance ISO's shown. Phynitty also leads on update cadence (weekly vs every 12 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fit Tolerance ISO ships an update every 12 months, Phynitty weekly. The most recent releases landed on October 12, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Fit Tolerance ISO | Phynitty |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fit-tolerance-iso/id1251895012/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 51 MB | 43 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yasar Yucel Yesilbag](https://appshunter.io/developer/1251895011) | [Manitty](https://appshunter.io/developer/1726198418) |

## What reviewers say

### Fit Tolerance ISO

[App page](https://appshunter.io/ios/app/fit-tolerance-iso/id1251895012)

Calculates engineering tolerances for various mechanical components based on ISO and ANSI standards. It determines size limits, deviations, and fit types for holes and shafts, offering schematic representations of fits.

**Highlights:** Calculates engineering tolerances, Supports ISO and ANSI standards, Determines clearance, transition, and interference fits, Provides schematic fit representations, Includes preferred tolerances and fits, Works with metric units

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

**In-app purchases:** none


### Phynitty

[App page](https://appshunter.io/ios/app/phynitty/id6615076169)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fit Tolerance ISO free?

Fit Tolerance ISO is free to download, with no in-app purchases.

### Is Phynitty free?

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

### Do Fit Tolerance ISO or Phynitty have ads?

Fit Tolerance ISO shows ads; Phynitty does not.

### Which is updated more often, Fit Tolerance ISO or Phynitty?

Fit Tolerance ISO ships an update every 12 months, and Phynitty weekly. Most recently, Fit Tolerance ISO was updated on October 12, 2026 and Phynitty on September 20, 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.*