# Flywheel Energy Calculator — Flywheel energy storage

> Flywheel energy storage (iPhone/iPad app by Tan Chia Ling.)

- Source: https://appshunter.io/ios/app/flywheel-energy-calculator/id1445819967 (this page in markdown: same URL + `.md`)
- Developer: [Tan Chia Ling](https://appshunter.io/developer/321121189)
- Category: Utilities, Productivity
- Price: $2.99
- Age rating: 4+
- Requires: iOS 17.6 · 1 MB
- Languages: English, French, German, Japanese, Korean, Portuguese, Chinese, Spanish, Chinese
- Released: 2018-12-13
- Data updated: 2026-06-22
- User reviews in markdown: https://appshunter.io/ios/app/flywheel-energy-calculator/id1445819967/reviews.md

## What is Flywheel Energy Calculator?

Flywheel Energy Calculator is a practical physics and engineering tool for calculating the rotational kinetic energy stored in a flywheel. Whether you are studying mechanics, comparing flywheel designs, checking RPM effects, or doing quick engineering estimates, this app helps you calculate results clearly and understand the formula behind them.

The app is based on the core rotational energy equation:
E = 1/2 × I × ω²

Choose from common flywheel models including solid disk, hollow cylinder, ring, or enter a custom moment of inertia. Add mass, radius, angular speed, and efficiency values, then see updated energy results instantly as you adjust the inputs.

Flywheel Energy Calculator supports both standard and reverse calculation workflows. You can calculate stored energy from speed and inertia, or solve for angular speed when a target energy value is known. This makes it useful for learning, design comparison, classroom demonstrations, and quick technical checks.

Key features include:
• Calculate flywheel rotational kinetic energy
• Support for solid disk, hollow cylinder, ring, and custom inertia
• Reverse calculation mode for solving angular speed
• Input mass, radius, RPM, rad/s, energy, and efficiency
• Switch between RPM and rad/s units
• View energy results in joules and kilowatt-hours
• Interactive sliders for fast parameter adjustment
• Step-by-step explanation of the calculation
• Flywheel diagram view for clearer visual understanding
• Save calculation results to history
• Delete individual records or clear saved history
• Tap to copy results
• Scientific notation for very small or very large values
• Clean SwiftUI interface with dark mode support

This app is designed for students, teachers, engineers, makers, technicians, and anyone working with rotational motion, kinetic energy, mechanical systems, or energy storage concepts. It keeps the calculation workflow simple while still showing the important physics behind each result.

Use Flywheel Energy Calculator to explore how mass, radius, speed, inertia, and efficiency affect stored energy. Small changes in RPM can create large differences in energy, and this app makes those relationships easy to test and understand.

Thank you for your support, and feel free to visit nitrio.com for more apps for your iOS devices.


## Version history (last 5 releases)

### 1.5 — 2026-06-15

- Updated for the newest devices.
- Minor UI update.
- Minor bugs fixed.

### 1.3 — 2026-03-17

- Updated for the newest devices.
- Minor bugs fixed.

### 1.2 — 2024-04-25

- Updated for the newest devices.
- Minor UI update.
- Minor bugs fixed.

### 1.1 — 2021-02-24

- Update for Newest Devices
- Bug Fixed

### 1.0 — 2018-12-13

No release notes.

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## More apps by Tan Chia Ling

- [Coloring Book - Plus](https://appshunter.io/ios/app/coloring-book-plus/id500418548)
- [Resistor Plus](https://appshunter.io/ios/app/resistor-plus/id500615686)
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- [Ohm Law Calculator](https://appshunter.io/ios/app/ohm-law-calculator/id505900137)
- [Premium Clock](https://appshunter.io/ios/app/premium-clock/id517487778)

All apps by Tan Chia Ling: https://appshunter.io/developer/321121189

## Related topics

[flywheel energy calculator](https://appshunter.io/ios/topics/flywheel-energy-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-22.*