Comparison

Fit Tolerance ISO Pro vs Simple Pendulum Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Fit Tolerance ISO Pro

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
Read full description

Limits, fits and tolerances calculator has been developed to calculate engineering tolerances of inner and outer features of journal bearings, linear bearings, thrust bearings, bushings, ball bearings, roller bearings, housings, cylinder bores, drilled holes, linear and precision shafts, pistons, etc. The calculator works in line with ISO 286-1 (2010), ISO 286-2 (2010) and ANSI B4.2 (1978) standards which are based on metric units. According to the input parameters of nominal size and hole/shaft tolerances, size limits and deviations for hole/shaft are calculated and fit type is selected among the clearance, transition and interference fits. The schematic representation of the fit is also drawn. The preferred tolerances and fits advised by ISO and ANSI standards can be found in the "Supplements" section.

About

Simple Pendulum Calculator

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
Read full description

The Simple Pendulum Calculator is a physics/math calculator designed to find the pendulum period, frequency, maximum height, energy of the system, or speed at the bottom quickly and easily. Features: - Instant calculation. - Results are copyable to other apps. - Formulas are included as reference. - Supports up to 16 decimal places. - Supports various units for each input. - Works seamlessly on both iPhone and iPad. - Lightweight, compact app optimized for everyday use. - Ad-free and built with privacy in mind. A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released, the restoring force acting on the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum and also to a slight degree on the amplitude, the width of the pendulum's swing. Simple Pendulum equation: T = 2π * √L/g Where: T : Period of the simple pendulum L : Length of the pendulum g : Acceleration due to gravity, the standard gravity of Earth is 9.80665m/s2 The velocity at the bottom of the swing is: v = √2g * L * (1-cos(a)) Where: v : The velocity at the bottom of the pendulum a : The angle from the vertical The Maximum height is: H = L - L * cos(a) The system energy is: E = m * v2 / 2 Where: E : System energy m : Mass of the object v : The velocity at the bottom of the pendulum Thanks for your support, and do visit nitrio.com for more apps for your iOS devices.

Screenshots

Fit Tolerance ISO Pro4 screens
Simple Pendulum Calculator4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Fit Tolerance ISO Pro versus Simple Pendulum Calculator: the parameters behind the verdict, then further details
ParameterFit Tolerance ISO ProSimple Pendulum Calculator
Price$0.99 — better$2.99
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews50.0% of reviews—
Number of ratings11
Update frequencyEvery 12 months — betterEvery 31 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013 — better
Further details — not scored
Size47 MB1 MB
Age rating4+4+
DeveloperYasar Yucel YesilbagNitrio

Customer experience

Fit Tolerance ISO Pro

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Simple Pendulum Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Fit Tolerance ISO Pro

No in-app purchases

None

Simple Pendulum Calculator

No in-app purchases

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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