# iOBD2 vs Circuit Resistance Creator

The clearest difference is review sentiment: Circuit Resistance Creator at 100% against iOBD2's 29%. Circuit Resistance Creator also leads on rating (5.0 vs 4.0) and update cadence (every 3 weeks vs every 3 months). iOBD2's advantage is ratings volume (19 vs 3) and iOS requirement (4.3 vs 14.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Circuit Resistance Creator holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: iOBD2 has 19 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 29% of iOBD2's written reviews are positive against 100% of Circuit Resistance Creator's.

iOBD2 ships an update every 3 months, Circuit Resistance Creator every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | iOBD2 | Circuit Resistance Creator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (19 ratings)](https://appshunter.io/ios/app/iobd2-dtc/id710380105/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/circuit-resistance-creator/id1475404949/reviews)** |
| Number of ratings | **19** | 3 |
| Positive reviews | 28.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 44 MB | 15 MB |
| Requires iOS | **4.3** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [翔宇 金](https://appshunter.io/developer/528881861) | [David White](https://appshunter.io/developer/911163945) |

## What reviewers say

### iOBD2

[App page](https://appshunter.io/ios/app/iobd2-dtc/id710380105)

This app serves as a reference for standard Diagnostic Trouble Codes (DTCs) found in vehicles. It helps users understand fault codes generated by a car's onboard computer, aiding in problem diagnosis.

**Highlights:** Diagnostic Trouble Code reference, Fault code lookup, Vehicle system diagnostics, Problem identification

**Features:** macOS Compatibility

**In-app purchases:** none


### Circuit Resistance Creator

[App page](https://appshunter.io/ios/app/circuit-resistance-creator/id1475404949)

Calculate equivalent resistance for any resistor circuit. This tool is designed for students, technicians, and engineers, offering high accuracy for voltage, current, and resistance. It's a great way to check homework and perform engineering calculations.

**Highlights:** Equivalent resistance calculation, Supports any resistor circuit, High accuracy displays (6 decimal places), Apply custom circuit voltages, Designed for students and engineers, Homework checking tool

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iOBD2 free?

iOBD2 is free to download, with no in-app purchases.

### Is Circuit Resistance Creator free?

Circuit Resistance Creator is free to download, with no in-app purchases.

### Which has better reviews, iOBD2 or Circuit Resistance Creator?

Circuit Resistance Creator is rated higher. iOBD2 averages 4.0 out of 5 from 19 ratings, while Circuit Resistance Creator averages 5.0 from 3 ratings.

### Do iOBD2 or Circuit Resistance Creator have ads?

Neither iOBD2 nor Circuit Resistance Creator shows ads.

### Which is updated more often, iOBD2 or Circuit Resistance Creator?

iOBD2 ships an update every 3 months, and Circuit Resistance Creator every 3 weeks. Most recently, iOBD2 was updated on November 1, 2026 and Circuit Resistance Creator on November 3, 2026.

---

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