# EE ToolKit PRO vs Circuit Laboratory HD

The clearest difference is review sentiment: EE ToolKit PRO at 90% against Circuit Laboratory HD's 0%. EE ToolKit PRO also leads on update cadence (every 3 months vs every 27 months) and device support (3 vs 1). Circuit Laboratory HD's advantage is price ($6.99 vs $9.99). On ads, in-app purchases, monetization model and iOS requirement there is nothing between them.

EE ToolKit PRO costs $9.99 and Circuit Laboratory HD $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

EE ToolKit PRO ships an update every 3 months, Circuit Laboratory HD every 27 months. The most recent releases landed on October 26, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | EE ToolKit PRO | Circuit Laboratory HD |
| --- | --- | --- |
| Price | $9.99 | **$6.99** |
| Rating | **[4.9 (293 ratings)](https://appshunter.io/ios/app/ee-toolkit-pro/id368780426/reviews)** | — |
| Number of ratings | **293** | — |
| Positive reviews | **89.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 27 months |
| Monetization | Paid | Paid |
| Size | 289 MB | 180 MB |
| Requires iOS | **12.0** | 12.4 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Fabrizio Boco](https://appshunter.io/developer/466239616) |

## What reviewers say

### EE ToolKit PRO

[App page](https://appshunter.io/ios/app/ee-toolkit-pro/id368780426)

This comprehensive toolkit offers over 160 electronic applications, calculators, and reference sections for electronics engineers, students, and hobbyists. It includes features like a multi-functional keyboard, color code tools, audio scope, and circuit simulations, with ongoing improvements and updates.

**Highlights:** Over 160 electronic applications, Multi-functional keyboard, Color code and SMD code tools, Audio scope and frequency generator, Component reference section with datasheets, 555 Timer tools, PCB trace impedance calculators, Real-time circuit simulations

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Top-notch tool
- 👍 Extremely helpful
- 🔥 Invaluable for electronics work
- 💯 Excellent app
- 🔍 Comprehensive reference

**What reviewers complain about**

- 🐛 Occasional crashes or bugs
- 🔍 UI could be more intuitive
- 📱 Some features not optimized for mobile
- 🔢 Limited functionality for advanced users

**Reported bugs**

- 7400 routine causes app to close
- Resistor value calculation issues
- Compatibility problems with newer iOS versions

**Requested features**

- Add support for vacuum tubes
- Implement logarithmic frequency sweep
- Include more component pinout information
- Integrate a circuit builder/simulator
- Add DB to RMS and peak-to-peak conversion


### Circuit Laboratory HD

[App page](https://appshunter.io/ios/app/circuit-laboratory-hd/id1056997109)

This app allows users to design and analyze electronic circuits graphically. It supports various analysis types including DC, AC, multifrequency AC, and transient, with a wide range of components and measuring instruments.

**Highlights:** Graphical circuit design, DC analysis, AC analysis, Multifrequency AC analysis, Transient analysis, Component library, Measuring instruments

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EE ToolKit PRO free?

EE ToolKit PRO costs $9.99, with no in-app purchases.

### Is Circuit Laboratory HD free?

Circuit Laboratory HD costs $6.99, with no in-app purchases.

### Do EE ToolKit PRO or Circuit Laboratory HD have ads?

Neither EE ToolKit PRO nor Circuit Laboratory HD shows ads.

### Which is updated more often, EE ToolKit PRO or Circuit Laboratory HD?

EE ToolKit PRO ships an update every 3 months, and Circuit Laboratory HD every 27 months. Most recently, EE ToolKit PRO was updated on October 26, 2026 and Circuit Laboratory HD on October 15, 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.*