# Resistor Plus vs MyChaffey

The clearest difference is price: MyChaffey at Free against Resistor Plus's $2.99. MyChaffey also leads on update cadence (every 5 months vs every 20 months) and iOS requirement (14.2 vs 16.6). On ads, in-app purchases and device support there is nothing between them.

MyChaffey is free to download; Resistor Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Resistor Plus ships an update every 20 months, MyChaffey every 5 months. The most recent releases landed on October 2, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Resistor Plus | MyChaffey |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[3.0 (6 ratings)](https://appshunter.io/ios/app/mychaffey/id6470768753/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 5 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 8 MB |
| Requires iOS | 16.6 | **14.2** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [UCROO](https://appshunter.io/developer/662021288) |

## What reviewers say

### Resistor Plus

[App page](https://appshunter.io/ios/app/resistor-plus/id500615686)

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.

**Highlights:** Resistor color code calculation, Tolerance calculation, Instant results display, Copy result functionality, Screenshot capability, Works on iPhone and iPad, Ad-free and private

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

**In-app purchases:** none


### MyChaffey

[App page](https://appshunter.io/ios/app/mychaffey/id6470768753)

This app provides students with a centralized hub for campus life. Access class schedules, assignments, student services, and campus events. Receive important announcements and connect with the college community.

**Highlights:** Class and assignment access, Student service information, Campus event listings, Push notifications for updates, Campus maps, Staff and department directory

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Resistor Plus free?

Resistor Plus costs $2.99, with no in-app purchases.

### Is MyChaffey free?

MyChaffey is free to download, with no in-app purchases.

### Do Resistor Plus or MyChaffey have ads?

Neither Resistor Plus nor MyChaffey shows ads.

### Which is updated more often, Resistor Plus or MyChaffey?

Resistor Plus ships an update every 20 months, and MyChaffey every 5 months. Most recently, Resistor Plus was updated on October 2, 2026 and MyChaffey 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.*