# Fit Tolerance ISO vs Flat Pattern Bend Calculator

The clearest difference is in-app purchases: Fit Tolerance ISO at none against Flat Pattern Bend Calculator's 6. Fit Tolerance ISO also leads on rating (5.0 vs 4.6). Flat Pattern Bend Calculator's advantage is update cadence (every 6 weeks vs every 12 months) and ratings volume (152 vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Flat Pattern Bend Calculator sells 6 in-app purchases, starting at $4.99 per month. Fit Tolerance ISO asks for nothing beyond the download.

Fit Tolerance ISO holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Flat Pattern Bend Calculator has 152 ratings behind it against 2, so its average is the more settled of the two.

Fit Tolerance ISO ships an update every 12 months, Flat Pattern Bend Calculator every 6 weeks. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Fit Tolerance ISO | Flat Pattern Bend Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fit-tolerance-iso/id1251895012/reviews)** | [4.6 (152 ratings)](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922/reviews) |
| Number of ratings | 2 | **152** |
| Positive reviews | — | 46.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 12 months | **Every 6 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 51 MB | 91 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yasar Yucel Yesilbag](https://appshunter.io/developer/1251895011) | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) |

## 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


### Flat Pattern Bend Calculator

[App page](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922)

This app provides accurate flat pattern layouts for complex sheet metal shapes and transitions. It simplifies calculations for cones, frustums, cylinders, and various transition pieces, saving time and reducing errors in fabrication projects.

**Highlights:** Cone calculations, Frustum calculations, Truncated cylinder layouts, Bend allowance calculations, Transition piece generation, Complex shape patterns

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MONTHLY UNLOCK | $4.99 | per month |
| Weekly Subscription | $4.99 | per 7 days |
| Offer : Yearly Access | $19.99 | per year |
| YEARLY UNLOCK | $29.99 | per year |
| Yearly Access | $39.99 | per year |
| LIFETIME UNLOCK | $49.99 | one-time |


## Frequently asked questions

### Is Fit Tolerance ISO free?

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

### Is Flat Pattern Bend Calculator free?

Flat Pattern Bend Calculator is free to download, with in-app purchases available.

### Which has better reviews, Fit Tolerance ISO or Flat Pattern Bend Calculator?

Fit Tolerance ISO is rated higher. Fit Tolerance ISO averages 5.0 out of 5 from 2 ratings, while Flat Pattern Bend Calculator averages 4.6 from 152 ratings.

### Do Fit Tolerance ISO or Flat Pattern Bend Calculator have ads?

Both Fit Tolerance ISO and Flat Pattern Bend Calculator show ads.

### Which is updated more often, Fit Tolerance ISO or Flat Pattern Bend Calculator?

Fit Tolerance ISO ships an update every 12 months, and Flat Pattern Bend Calculator every 6 weeks. Most recently, Fit Tolerance ISO was updated on November 2, 2026 and Flat Pattern Bend Calculator on November 6, 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.*