# Resistor Color Code Calc. vs Air2Transfer

The clearest difference is price: Resistor Color Code Calc. at Free against Air2Transfer's $4.99. Resistor Color Code Calc. also leads on device support (3 vs 1) and iOS requirement (15.6 vs 26.2). Air2Transfer's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 5 months). On ads there is nothing between them.

Resistor Color Code Calc. is free to download; Air2Transfer costs $4.99 up front. Resistor Color Code Calc. sells 1 one-off in-app purchase. Air2Transfer asks for nothing beyond the download.

Resistor Color Code Calc. ships an update every 5 months, Air2Transfer every 3 weeks. The most recent releases landed on October 12, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Resistor Color Code Calc. | Air2Transfer |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/resistor-color-code-calc/id6755287812/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 35 MB | 3 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | +4 | 4+ |
| Developer | [Sachinbhai Surani](https://appshunter.io/developer/1838685550) | [IENG PHO](https://appshunter.io/developer/1896393702) |

## What reviewers say

### Resistor Color Code Calc.

[App page](https://appshunter.io/ios/app/resistor-color-code-calc/id6755287812)

Instantly decode resistor color bands, calculate exact values, and convert SMD resistor markings. This app provides essential tools for electronics students, technicians, and hobbyists with a clean interface and fast processing.

**Highlights:** Decode 3- to 6-band resistors, Calculate resistance values, Convert SMD resistor codes, Series and parallel resistor calculators, Save and share results, Clean and simple interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $12.99 | one-time |


### Air2Transfer

[App page](https://appshunter.io/ios/app/air2transfer/id6776882506)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Resistor Color Code Calc. free?

Resistor Color Code Calc. is free to download, with in-app purchases available.

### Is Air2Transfer free?

Air2Transfer costs $4.99, with no in-app purchases.

### Do Resistor Color Code Calc. or Air2Transfer have ads?

Neither Resistor Color Code Calc. nor Air2Transfer shows ads.

### Which is updated more often, Resistor Color Code Calc. or Air2Transfer?

Resistor Color Code Calc. ships an update every 5 months, and Air2Transfer every 3 weeks. Most recently, Resistor Color Code Calc. was updated on October 12, 2026 and Air2Transfer on September 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*