# Atempower vs SJ Resistor Calculator

The clearest difference is rating: SJ Resistor Calculator at 5.0 against Atempower's 1.0. Atempower's advantage is in-app purchases (none vs 5) and ads (none vs shown). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. SJ Resistor Calculator sells 5 one-off in-app purchases. Atempower asks for nothing beyond the download.

SJ Resistor Calculator holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Atempower ships an update fortnightly, SJ Resistor Calculator every 2 weeks. Both last shipped on November 4, 2026.

## The numbers

| Metric | Atempower | SJ Resistor Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/atempower/id6497225411/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sj-resistor-calculator/id6504838457/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 38 MB | 4 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [VIC OFFROAD PTY. LTD.](https://appshunter.io/developer/1757593190) | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) |

## What reviewers say

### Atempower

[App page](https://appshunter.io/ios/app/atempower/id6497225411)

Monitor and control device hardware status in real-time. Access detailed operational data, receive immediate alerts for issues, and remotely manage device power switches.

**Highlights:** Real-time device status collection, Hardware information control, Access device operation data, Real-time monitoring, View detailed operational data, Remote power switch control

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

**In-app purchases:** none


### SJ Resistor Calculator

[App page](https://appshunter.io/ios/app/sj-resistor-calculator/id6504838457)

This tool simplifies resistor calculations for electronics enthusiasts, students, and professionals. It accurately decodes resistor color codes and performs series/parallel calculations for complex circuit analysis. Avoid manual errors and streamline your electronics projects.

**Highlights:** Resistor color code decoding (4, 5, 6 band), Series resistor calculations, Parallel resistor calculations, Accurate resistance and tolerance values, User-friendly interface

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A coffee | $0.99 | one-time |
| A cookie | $2.99 | one-time |
| No ads | $4.99 | one-time |
| A lemon tart | $4.99 | one-time |
| A pizza | $9.99 | one-time |


## Frequently asked questions

### Is Atempower free?

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

### Is SJ Resistor Calculator free?

SJ Resistor Calculator is free to download, with in-app purchases available.

### Which has better reviews, Atempower or SJ Resistor Calculator?

SJ Resistor Calculator is rated higher. Atempower averages 1.0 out of 5 from 1 ratings, while SJ Resistor Calculator averages 5.0 from 1 ratings.

### Do Atempower or SJ Resistor Calculator have ads?

SJ Resistor Calculator shows ads; Atempower does not.

### Which is updated more often, Atempower or SJ Resistor Calculator?

Atempower ships an update fortnightly, and SJ Resistor Calculator every 2 weeks. Most recently, Atempower was updated on November 4, 2026 and SJ Resistor Calculator on November 4, 2026.

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