# Fit Tolerance ISO Pro vs Simple Pendulum Calculator

The clearest difference is update cadence: Fit Tolerance ISO Pro at every 12 months against Simple Pendulum Calculator's every 31 months. Fit Tolerance ISO Pro also leads on price ($0.99 vs $2.99). Simple Pendulum Calculator's advantage is iOS requirement (13 vs 15.0). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Fit Tolerance ISO Pro costs $0.99 and Simple Pendulum Calculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Fit Tolerance ISO Pro against 5.0 for Simple Pendulum Calculator. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Fit Tolerance ISO Pro ships an update every 12 months, Simple Pendulum Calculator every 31 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Fit Tolerance ISO Pro | Simple Pendulum Calculator |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/fit-tolerance-iso-pro/id1397159146/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/simple-pendulum-calculator/id1397285555/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 31 months |
| Monetization | Paid | Paid |
| Size | 47 MB | 1 MB |
| Requires iOS | 15.0 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yasar Yucel Yesilbag](https://appshunter.io/developer/1251895011) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Fit Tolerance ISO Pro

[App page](https://appshunter.io/ios/app/fit-tolerance-iso-pro/id1397159146)

Calculate engineering tolerances for various mechanical components like bearings, shafts, and housings. It adheres to ISO and ANSI standards, providing size limits, deviations, and fit types. Visual representations of fits are also generated.

**Highlights:** Calculate engineering tolerances, Supports ISO and ANSI standards, Determines clearance, transition, and interference fits, Provides schematic fit representations, Includes preferred tolerances and fits, Calculates size limits and deviations

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

**In-app purchases:** none


### Simple Pendulum Calculator

[App page](https://appshunter.io/ios/app/simple-pendulum-calculator/id1397285555)

This physics calculator quickly computes pendulum period, frequency, maximum height, energy, and speed. It supports various units, offers instant calculations with copyable results, and includes formulas for reference. Designed for privacy and efficiency, it works seamlessly on iOS devices.

**Highlights:** Instant pendulum calculations, Copyable results, Included formulas, Supports various units, High precision (16 decimal places), Ad-free and private

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fit Tolerance ISO Pro free?

Fit Tolerance ISO Pro costs $0.99, with no in-app purchases.

### Is Simple Pendulum Calculator free?

Simple Pendulum Calculator costs $2.99, with no in-app purchases.

### Which has better reviews, Fit Tolerance ISO Pro or Simple Pendulum Calculator?

Fit Tolerance ISO Pro and Simple Pendulum Calculator are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Fit Tolerance ISO Pro or Simple Pendulum Calculator have ads?

Neither Fit Tolerance ISO Pro nor Simple Pendulum Calculator shows ads.

### Which is updated more often, Fit Tolerance ISO Pro or Simple Pendulum Calculator?

Fit Tolerance ISO Pro ships an update every 12 months, and Simple Pendulum Calculator every 31 months. Most recently, Fit Tolerance ISO Pro was updated on November 6, 2026 and Simple Pendulum Calculator on November 2, 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.*