# ResistorVision

> iPhone app to identify 4-band resistor values via camera. (iPhone/iPad app by Jera Design LLC.)

- Source: https://appshunter.io/ios/app/resistorvision/id839853035 (this page in markdown: same URL + `.md`)
- Developer: [Jera Design LLC](https://appshunter.io/developer/284959569)
- Category: Utilities, Education
- Price: $1.99
- Rating: 1.88/5 from 16 App Store ratings · 13 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 4 MB
- Languages: English
- Released: 2014-05-16
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/resistorvision/id839853035/reviews.md

## What is ResistorVision?

ResistorVision instantly tells you the value of any standard beige 4-band resistor you point your iPhone’s camera at.

Unlike other resistor calculators, ResistorVision offers touch-free operation. Just place a beige 4-band resistor on a white background, with the tolerance band (usually gold or silver) on the right. Then point your iPhone’s camera at the resistor and the value is instantly shown at the top of the screen.

Note: Does not currently work with resistors with a blue body or resistors below 10 ohms.

Resistors can be purchased at any electronics supply store.

## Key features

- Instant resistor value identification
- Camera-based operation
- Touch-free functionality
- Supports standard 4-band resistors
- Works with beige resistors

## Recent user reviews (10 of 13)

All indexed reviews: https://appshunter.io/ios/app/resistorvision/id839853035/reviews.md

### 1/5 — Doesn’t work at all

*2023-05-27*

The focus doesn’t allow it to work with iPhone pro cameras, with the focus being set the way it is. Great idea but poor implementation.

### 1/5 — Useless.

*2023-04-28*

Doesn’t work at all.  Turns the camera / flashlight full blast.  I think the glare off of the resistor is “blinding” it.  Does not work at all.

### 1/5 — Should of read the reviews first!

*2022-12-21, version 1.2*

Causes high anxiety because it doesn’t work. Even on white paper, it just glitches and shows some color bands on bottom of screen.
No resistor values seen with multiple attempts.
Wish could get a refund but live and learn.
Dang it.

### 1/5 — Poorly developed app

*2022-10-27, version 1.2*

Has no focus control on camera

### 2/5 — it only works with a paper in the background

*2021-10-11, version 1.2*

this app is useless almost, it works only in the perfect Conditions, you have to have the resistor in a white background to make it work
it does not work if it is soldered in the motherboard or anywhere else.

### 1/5 — doesn’t work on iPhone 12 mini

*2021-01-30, version 1.2*

The resistor is too small in the frame for the app to see it. If I get closer, the image gets blurry and the app complains the image is not in focus.

### 1/5 — Lost my time plus 2 usd

*2020-11-28, version 1.2*

It simply does not work.

### 2/5 — It needs autofocus

*2020-11-16, version 1.2*

The app only uses a single zoom level, with no option to autofocus, so scanning a resistor that’s not in focus is almost impossible, and moving it into focus just shows a blank white box with no data, and no resistor color bands.

### 2/5 — Doesnt work with all resistors

*2020-07-17, version 1.2*

Two stars for the effort. Keep at it, you’ll eventually make this a working resistor identifier.

### 5/5 — A must-have app for the color-blind

*2017-01-31, version 1.1*

As a colorblind person learning electronics, I've had trouble evaluating color-coded resistors; this app has largely solved my problem, though it has some limitations.

Focusing on a beige resistor against a pale background will allow it to read the bands and give you the values.The app is both responsive and accurate, within its limitations. It does not, however, work with resistors more than four bands, resistors with a blue body or with resistors below 10 Ohms.

Another limitation is that it has trouble working against dark, complex or visually-confused backgrounds, so reading the value of a resistor 'in situ' may be problematic. I have worked around this problem by cutting out a small piece of 3"x5" index card and slidingit under the resistor to provide the uniform, pale background that the app needs.

Seems to work well, though, within the limits described above. I would recommend it for any color-blind person trying to evaluate resistors.

## Frequently asked questions about ResistorVision

### What is ResistorVision?

ResistorVision is a utility app that uses your iPhone's camera to instantly determine the value of standard 4-band resistors. It is designed for quick, touch-free identification.

### How much does ResistorVision cost?

ResistorVision is a paid app, available for $1.99. This one-time purchase grants you access to its resistor identification features.

### What devices does ResistorVision support?

ResistorVision is compatible with iPhone, iPad, and iPod touch devices. It requires iOS 4.0 or later.

### Does ResistorVision work with all types of resistors?

Currently, ResistorVision works with standard beige 4-band resistors. It does not support resistors with a blue body or those with values below 10 ohms.

### How accurate is ResistorVision?

ResistorVision has an average rating of 1.9 stars from 16 ratings, indicating potential user concerns about its accuracy or functionality. Users should test it with known resistors.

### When was ResistorVision last updated?

The latest version of ResistorVision, 1.2, was released on May 15, 2020. The app was originally released on May 16, 2014.

### What is the age rating for ResistorVision?

ResistorVision has an age rating of 4+, making it suitable for users of all ages. It is a straightforward utility tool.

### Can ResistorVision identify resistors without a gold or silver tolerance band?

The app's instructions specify placing the tolerance band (usually gold or silver) on the right for accurate identification. It may not work reliably with resistors that do not follow this convention.

## Version history (last 1 release)

### 1.2 — 2020-05-15

Now works with all modern iPhones.

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## More apps by Jera Design LLC

- [Improv Suggestifier](https://appshunter.io/ios/app/improv-suggestifier/id315296360)

All apps by Jera Design LLC: https://appshunter.io/developer/284959569

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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 2026-06-10.*