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.




248+ iOS apps curated and reviewed
Whether you're new to resistor color barcode or looking for an upgrade, our curated collection of 248+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | — | No | No | May 2026 | ||
| 2 | Free | 4.9★ (60) | No | No | Sep 2026 | ||
| 3 | Free | 4.0★ (1) | No | No | May 2026 | ||
| 4 | Free | 5.0★ (2) | No | No | May 2026 | ||
| 5 | Free | 5.0★ (5) | Yes | No | Sep 2026 | ||
| 6 | Free | 3.6★ (27) | Yes | No | Jun 2026 | ||
| 7 | Free | 3.0★ (1) | No | Yes | Sep 2026 | ||
| 8 | Free | — | Yes | No | Sep 2026 |








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.

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