# Resistor Tools vs Convert Text to PDF‧

The clearest difference is update cadence: Resistor Tools at every 2 months against Convert Text to PDF‧'s every 5 months. Resistor Tools also leads on iOS requirement (12.0 vs 15.3). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Resistor Tools sells 1 one-off in-app purchase and Convert Text to PDF‧ sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Resistor Tools ships an update every 2 months, Convert Text to PDF‧ every 5 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Resistor Tools | Convert Text to PDF‧ |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 7 MB |
| Requires iOS | **12.0** | 15.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [AD ZITOPROMET ZAJECAR](https://appshunter.io/developer/1861134290) |

## 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 |


### Convert Text to PDF‧

[App page](https://appshunter.io/ios/app/convert-text-to-pdf/id6756518658)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDFast PRO (weekly) | $4.99 | per 7 days |
| PDFast PRO (Weekly) | $12.99 | per month |
| PDFast PRO (yearly) | $49.99 | per year |


## Frequently asked questions

### Is Resistor Tools free?

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

### Is Convert Text to PDF‧ free?

Convert Text to PDF‧ is free to download, with in-app purchases available.

### Do Resistor Tools or Convert Text to PDF‧ have ads?

Neither Resistor Tools nor Convert Text to PDF‧ shows ads.

### Which is updated more often, Resistor Tools or Convert Text to PDF‧?

Resistor Tools ships an update every 2 months, and Convert Text to PDF‧ every 5 months. Most recently, Resistor Tools was updated on November 1, 2026 and Convert Text to PDF‧ on October 30, 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.*