# Resistor Tools vs Pareva

The clearest difference is in-app purchases: Pareva at none against Resistor Tools's 1. Pareva also leads on update cadence (every 9 days vs every 2 months). Resistor Tools's advantage is iOS requirement (12.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Resistor Tools sells 1 one-off in-app purchase. Pareva asks for nothing beyond the download.

Resistor Tools ships an update every 2 months, Pareva every 9 days. The most recent releases landed on September 24, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Resistor Tools | Pareva |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/resistor-tools/id826045228/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 7 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Pareva](https://appshunter.io/developer/1895111283) |

## What reviewers say

### Resistor Tools

[App page](https://appshunter.io/ios/app/resistor-tools/id826045228)

This utility app provides a suite of tools for calculating and determining resistor values. It assists hobbyists and engineers with series, parallel, and voltage divider calculations, as well as inverting amplifier gain.

**Highlights:** Series and parallel resistor calculation, Resistor combination finder, Voltage divider ratio and value calculation, Inverting amplifier gain calculation, Save combinations to CSV

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock pro feature | $0.99 | one-time |


### Pareva

[App page](https://appshunter.io/ios/app/pareva/id6762989334)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Resistor Tools free?

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

### Is Pareva free?

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

### Do Resistor Tools or Pareva have ads?

Neither Resistor Tools nor Pareva shows ads.

### Which is updated more often, Resistor Tools or Pareva?

Resistor Tools ships an update every 2 months, and Pareva every 9 days. Most recently, Resistor Tools was updated on September 24, 2026 and Pareva on September 11, 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.*