# Ohm Law — DC circuit simulation

> DC circuit simulation (iPhone/iPad app by 坤 冉.)

- Source: https://appshunter.io/ios/app/ohm-law/id6737541296 (this page in markdown: same URL + `.md`)
- Developer: [坤 冉](https://appshunter.io/developer/1759927074)
- Category: Education, Games, Casual, Simulation
- Price: $4.99
- Age rating: 4+
- Requires: iOS 15.6 · 7 MB
- Languages: American English
- Released: 2024-11-22
- Data updated: 2026-08-19
- User reviews in markdown: https://appshunter.io/ios/app/ohm-law/id6737541296/reviews.md

## What is Ohm Law?

The invention of electricity is one of the greatest in human history, providing powerful mechanical energy, diverse communication and presentation methods, and intelligent information processing and control technologies. Ohm's Law and Kirchhoff's Voltage and Current Laws are fundamental, essential for beginners. This app demonstrates these laws, allowing users to connect batteries, bulbs, rheostats, ammeters, and voltmeters to observe current and voltage in series, parallel, and combined circuits. Suitable for students, electrical enthusiasts, physics lovers, and educators, it also offers leisure fun: watching old tungsten bulbs light up, feeling warm flickering light, measuring with traditional meters, and experimenting with shorts.

Main features:
1. Batteries, bulbs, rheostats, and wires: Connect with red or black wires. Bulb brightness depends on current.
2. Voltmeter: Measures voltage across any circuit, with 3V and 15V ranges.
3. Ammeter: Measures current in series with any circuit, with 0.6A and 3A ranges.
4. Magnifier: Touch the screen (not rheostat slider) to zoom in on terminal positions or meter readings.
5. Circuit connections: Freely connect components in series, parallel, or combinations, following Ohm's and Kirchhoff's Laws.
6. Shorts: Overheated wires glow red in short circuits.


## Version history (last 3 releases)

### 1.1.1 — 2026-08-19

1. Remove background to make the experiment interface cleaner and more focused.  
2. Add two-finger pinch-to-zoom functionality.  
3. Add experimental data recording functionality.  
4. Add functionality to browse and open historical experiment data.  
5. Add experimental data sharing functionality.

### 1.1.0 — 2025-01-09

1. Added the room background to improve lighting effects and aesthetics.
2. Added a smoking effect for wires and ammeters under short-circuit conditions.
3. Removed black spots that appeared during the filament lighting process.

### 1.0 — 2024-11-22

No release notes.

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## More apps by 坤 冉

- [Optical Path](https://appshunter.io/ios/app/optical-path/id6670541141)
- [Vernier Key](https://appshunter.io/ios/app/vernier-key/id6743193320)
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All apps by 坤 冉: https://appshunter.io/developer/1759927074

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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 2026-08-19.*