Easily determine resistor values without a multimeter. Simply spin the color wheels to match your resistor. This tool simplifies the process of identifying resistance.


245+ iOS apps curated and reviewed
If you already know Resistor Color Codes, this is the deeper bench. 245+ resistor color codes apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 5.0★ (2) | No | No | May 2026 | ||
| 2 | Free | 4.0★ (1) | No | No | May 2026 | ||
| 3 | Free | — | Yes | No | Sep 2026 | ||
| 4 | Free | 5.0★ (5) | Yes | No | Sep 2026 | ||
| 5 | Free | 3.6★ (27) | Yes | No | Jun 2026 | ||
| 6 | Free | 4.9★ (60) | No | No | Sep 2026 | ||
| 7 | Free | — | No | No | May 2026 | ||
| 8 | Free | — | Yes | No | Jul 2026 |


Easily determine resistor values without a multimeter. Simply spin the color wheels to match your resistor. This tool simplifies the process of identifying resistance.

Quickly identify the value of resistors using their color bands. This utility tool simplifies electronics calculations for hobbyists and professionals alike.






Instantly decode resistor color bands to find resistance, tolerance, and TCR. Also calculates series/parallel resistance and voltage dividers. Supports E-series validation and multiple languages.