# Voltage Divider

> Calculates voltage divider circuit values, including resistor selection and tolerance. (iPhone/iPad app by Ditty Labs, LLC.)

- Source: https://appshunter.io/ios/app/voltage-divider/id372094728 (this page in markdown: same URL + `.md`)
- Developer: [Ditty Labs, LLC](https://appshunter.io/developer/420813089)
- Category: Utilities, Productivity
- Price: $1.99
- Rating: 2.67/5 from 3 App Store ratings · 9 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 1 MB
- Languages: English
- Released: 2010-05-20
- Data updated: 2026-06-23
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/voltage-divider/id372094728/reviews.md

## What is Voltage Divider?

A handy engineering utility that solves for voltages or resistor values in a common voltage divider circuit.  Enter three terms (out of Vin, Vout, R1 or R2) and this app will solve for the fourth term automatically.  The resistor picker will only let you pick from actual resistor values that exist.  It's a great time saving tool for quickly selecting resistor values in a switching power supply design or any other circuit that incorporates a voltage divider.

When solving for a voltage, select two resistor values and one of the voltages.  The remaining voltage will be displayed automatically.  The max and min possible voltages will also be displayed based on the resistor tolerances.  The current and power through the divider will be displayed at the bottom of the screen.

When solving for a resistor value, select two voltages and one resistor value.  The remaining resistor value will be displayed in yellow.  This is an ideal value.  Use the resistor picker to select an actual resistor value close to that ideal value.  You can then tell the app to solve for Vin or Vout to see if the resulting voltage meets your design requirements.

## Key features

- Solves for Vin, Vout, R1, or R2
- Resistor picker with actual values
- Displays ideal resistor value
- Calculates voltage tolerance
- Shows current and power consumption

## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/voltage-divider/id372094728/reviews.md

### 1/5 — DONT BUY THIS APP

*2022-01-14, version 1.0.2*

dont work, i need to calc what resistor i need to convert 12v into 7 and i cant!!! this app dont work, vert spensive and slow, also ADS!!!!! on a paid app, omg, dont buy this

### 1/5 — Needs Update!

*2012-10-21, version 1.0*

Since iOS 6 update, no longer works. Crashes soon after you start entering values.  Remove, reboot, reinstall, reboot doesn't help.

### 5/5 — Great

*2012-04-20*

Great app. Best of all it calculates the power that the circuit can deliver so you know what size resistors to get. 

Good work.

### 3/5 — Does what it says, nothing more.

*2012-04-06, version 1.0*

Nice user friendly interface.  Would be handy if it displayed power dissipation of each resistor, then displayed minimum resistor package size (i.e. 0603 SMT for <0.1W, etc.).

### 1/5 — hockey

*2012-03-16*

its completely rubbish, never download this application.......

### 5/5 — Made me look good.

*2012-03-06, version 1.0*

I used this app at work to knock out 110 voltage dividers in no time at all. Worth every cent.

### 5/5 — Simply Beautiful

*2010-07-07, version 0*

Elegant in form and function, so fun to use it makes me want to start a new electronics project just to play with it.

We need more apps like this, I'd love one for playing with transistors or analog ic's.

### 4/5 — more than a solver

*2010-07-01, version 0*

I design power supplies so I often have to calculate the feedback voltage divider. Sure, it is easy enough in a calculator but having all the standard 1% and 5% values in this app makes things easy. I normally have to solve for a R value and then look up the closest real 1% value. Then I solve to find my actual output voltage only to find that it isn't close enough so I have to do it again with another R value. With this App I can just have the it solve for the ideal value and then the resistor selction wheel shows me the closes real value resistors. I can easily see what my output voltage would be using those values.

Pros: works well and looks pretty good. It is cool to see the color bands on the resistors change with value
Cons: On my 2G iPhone the resistors had black splotches on them. All is good with my iPhone4 (I think 3G and up don't have this problem).

### 5/5 — Excellent

*2010-06-30, version 0*

This is an excellent app with a nice, clean GUI that will prove to be a favorite when building your next circuit.

## Frequently asked questions about Voltage Divider

### What is Voltage Divider used for?

Voltage Divider is an engineering utility designed to solve for unknown voltages or resistor values within a common voltage divider circuit. It simplifies calculations for circuit design and analysis.

### How does Voltage Divider help with resistor selection?

Voltage Divider provides an 'ideal' resistor value and then uses a resistor picker that only allows selection from actual, available resistor values. This helps users choose a practical resistor that closely matches their design needs.

### What information does Voltage Divider display when solving for voltage?

When solving for voltage, Voltage Divider displays the calculated voltage, the maximum and minimum possible voltages based on resistor tolerances, and the current and power consumed by the divider.

### Does Voltage Divider support offline use?

The provided data does not specify offline functionality. However, as a calculation utility, it is likely to function without an internet connection once installed.

### How often is Voltage Divider updated?

Voltage Divider was last updated on April 23, 2023. The version is 1.0.3. Update frequency can vary based on developer priorities and user feedback.

### What devices is Voltage Divider available on?

Voltage Divider is available for iPhone and iPod devices. It is not listed as available for Android devices.

### What is the price of Voltage Divider?

Voltage Divider is a paid application priced at $1.99. There are no in-app purchases or subscription fees associated with it.

### What is the age rating for Voltage Divider?

Voltage Divider has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

## Version history (last 5 releases)

### 1.0.4 — 2026-06-09

Fixed presentation bug on resistor picker.

### 1.0.3 — 2023-04-23

Updated for iOS 16

### 1.0.2 — 2017-07-26

This app has been updated by Apple to display the Apple Watch app icon.

Updated to run on latest version of iOS.

Special shout out to John McClelland.  Thanks for the motivation :-)

### 1.0.1 — 2012-11-05

Bug fixes
iOS 6 support

### 1.0 — 2010-05-20

No release notes.

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## More apps by Ditty Labs, LLC

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All apps by Ditty Labs, LLC: https://appshunter.io/developer/420813089

## Related topics

[voltage divider](https://appshunter.io/ios/topics/voltage-divider) · [voltage divider calculator](https://appshunter.io/ios/topics/voltage-divider-calculator) · [voltage power studio](https://appshunter.io/ios/topics/voltage-power-studio)

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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 2026-06-23.*