250+ iOS apps curated and reviewed
If you already know LED Resistor Calculator & SMD, this is the deeper bench. 250+ led resistor calculator plus apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | Yes | Jun 2026 |
| 2 |  | $2.99 | 4.8★ (8) | No | No | Aug 2026 |
| 3 |  | Free | 4.9★ (60) | No | No | Aug 2026 |
| 4 |  | $0.99 | — | — | No | May 2026 |
| 5 |  | Free | 3.6★ (27) | Yes | No | Jun 2026 |
| 6 |  | $0.99 | 4.3★ (6) | No | No | Aug 2026 |
| 7 |  | Free | 1.0★ (1) | Yes | No | May 2026 |
| 8 |  | Free | 4.0★ (1) | No | No | May 2026 |
Calculate the correct series resistor needed to safely power light-emitting diodes. Input supply voltage, LED voltage drop, current, and the number of LEDs to find the required resistor value and wattage.
Easily determine the resistance value of electronic components. Simply select the number of color bands on your resistor and input the colors one by one to instantly get the resistance and tolerance. This tool simplifies a common electronics task.
Easily determine the resistance value of electronic components using their color bands. This reference tool supports both 4 and 5-band resistors, making it ideal for makers, engineers, and students working with electronics projects.
This utility simplifies calculating LED resistors by handling various voltages, decimal values, and multiple LEDs. It offers intuitive input methods for power supply and LED ratings, making complex calculations straightforward.
This application assists in designing electronic circuits by calculating the necessary resistor values for LEDs. It simplifies the process of determining the correct components for your LED projects.
Quickly identify the value of resistors using their color bands. This utility tool simplifies electronics calculations for hobbyists and professionals alike.
This utility helps you determine the resistance value of resistors by interpreting their colored bands. It supports 3, 4, 5, and 6 band resistors, visually displaying your selections and the calculated resistance and tolerance.
Point your phone's camera at a resistor to instantly identify its value. Currently supports 4-band carbon film resistors with a 5% tolerance.
This application provides essential technical calculations for LED screens, including ballast, pixel, and power requirement analysis. It's designed to be the ultimate tool for LED technicians during on-site work and production preparation.
Easily calculate resistor values and tolerance using color codes. Simply select the colors for each band, and the app instantly displays the resistance in ohms. Save your results with screenshots for future reference.
This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.
This tool simplifies resistor calculations for electronics enthusiasts, students, and professionals. It accurately decodes resistor color codes and performs series/parallel calculations for complex circuit analysis. Avoid manual errors and streamline your electronics projects.