# PDF Fox vs Electronics Reference Toolkit

The clearest difference is update cadence: Electronics Reference Toolkit at fortnightly against PDF Fox's every 2 months. PDF Fox's advantage is device support (3 vs 1). 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.

PDF Fox ships an update every 2 months, Electronics Reference Toolkit fortnightly. The most recent releases landed on September 20, 2026 and July 16, 2026 respectively.

## The numbers

| Metric | PDF Fox | Electronics Reference Toolkit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (7 ratings)](https://appshunter.io/ios/app/electronics-reference-toolkit/id6757098692/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 43 MB | 7 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yasin Kuyu](https://appshunter.io/developer/1234723142) | [Ha Do Thi Thu](https://appshunter.io/developer/1707030622) |

## What reviewers say

### PDF Fox

[App page](https://appshunter.io/ios/app/pdf-fox/id6756534248)

This comprehensive toolkit offers a suite of PDF management features, including editing, scanning, signing, and conversion. It prioritizes user privacy by operating entirely offline, ensuring your documents remain on your device without requiring accounts or subscriptions.

**Highlights:** Offline PDF editing, OCR text recognition, Secure PDF signing, Document scanning, PDF merging and splitting, File compression, Password protection

**Features:** macOS Compatibility

**In-app purchases:** none


### Electronics Reference Toolkit

[App page](https://appshunter.io/ios/app/electronics-reference-toolkit/id6757098692)

This app provides a comprehensive suite of tools for electronics calculations and reference. It includes calculators for resistors, LEDs, capacitors, and voltage dividers, along with a unit converter and transistor database. Designed for speed and offline use, it's ideal for students, hobbyists, and engineers.

**Highlights:** Resistor Calculator (4/5 band), Ohm's Law Calculator, LED Resistor Calculator, Capacitor Decoder, Voltage Divider Calculator, Unit Converter, Transistor Reference

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF Fox free?

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

### Is Electronics Reference Toolkit free?

Electronics Reference Toolkit is free to download, with no in-app purchases.

### Do PDF Fox or Electronics Reference Toolkit have ads?

Neither PDF Fox nor Electronics Reference Toolkit shows ads.

### Which is updated more often, PDF Fox or Electronics Reference Toolkit?

PDF Fox ships an update every 2 months, and Electronics Reference Toolkit fortnightly. Most recently, PDF Fox was updated on September 20, 2026 and Electronics Reference Toolkit on July 16, 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.*