# Electrical Engineering vs Sign,Stamp,Convert | ConfiDoc

The clearest difference is price: Electrical Engineering at Free against Sign,Stamp,Convert | ConfiDoc's $4.99. Sign,Stamp,Convert | ConfiDoc's advantage is ads (none vs shown) and update cadence (every 4 days vs every 2 months). On in-app purchases, device support and iOS requirement there is nothing between them.

Electrical Engineering is free to download; Sign,Stamp,Convert | ConfiDoc costs $4.99 up front. Electrical Engineering sells 7 in-app purchases, starting at $3.99 per month and Sign,Stamp,Convert | ConfiDoc sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Electrical Engineering ships an update every 2 months, Sign,Stamp,Convert | ConfiDoc every 4 days. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Electrical Engineering | Sign,Stamp,Convert | ConfiDoc |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.8 (12 ratings)](https://appshunter.io/ios/app/electrical-engineering-quiz/id1330321712/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 73.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 115 MB | 22 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carlo Terracciano](https://appshunter.io/developer/1159639539) | [jeiox guarda de documentos e logistica ltda](https://appshunter.io/developer/1494149809) |

## What reviewers say

### Electrical Engineering

[App page](https://appshunter.io/ios/app/electrical-engineering-quiz/id1330321712)

This app provides electrical calculations and fundamental concepts for students and professionals. It covers Ohm's Law, power calculations, circuit analysis, and advanced topics like wire sizing and power factor correction.

**Highlights:** Electrical calculations, Basic electrical knowledge, Advanced electrical topics, Ohm's Law and power calculations, Circuit analysis theorems, Wire sizing and voltage drop, Resistor color codes

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription - Electro | $3.99 | per month |
| Monthly subscription - Electro | $5.99 | per month |
| Annual Subscription Electronic | $8.99 | per year |
| Annual Subscription Electronic | $24.99 | per year |
| Annual Subscription Electronic | $24.99 | per year |
| Lifetime Subscription Electro | $29.99 | one-time |
| Circuits & Electric Machines | $99.99 | one-time |


### Sign,Stamp,Convert | ConfiDoc

[App page](https://appshunter.io/ios/app/signstampconvert-confidoc/id6737372986)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ConfiDoc_weekly | $2.99 | per 7 days |
| ConfiDoc_Monthly | $7.99 | per month |


## Frequently asked questions

### Is Electrical Engineering free?

Electrical Engineering is free to download, with in-app purchases available.

### Is Sign,Stamp,Convert | ConfiDoc free?

Sign,Stamp,Convert | ConfiDoc costs $4.99, and also offers in-app purchases.

### Do Electrical Engineering or Sign,Stamp,Convert | ConfiDoc have ads?

Electrical Engineering shows ads; Sign,Stamp,Convert | ConfiDoc does not.

### Which is updated more often, Electrical Engineering or Sign,Stamp,Convert | ConfiDoc?

Electrical Engineering ships an update every 2 months, and Sign,Stamp,Convert | ConfiDoc every 4 days. Most recently, Electrical Engineering was updated on October 22, 2026 and Sign,Stamp,Convert | ConfiDoc on October 25, 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.*