# Calctronics vs E拆

The clearest difference is in-app purchases: E拆 at none against Calctronics's 1. E拆 also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Calctronics sells 1 one-off in-app purchase. E拆 asks for nothing beyond the download.

Calctronics ships an update every 2 months, E拆 every 5 weeks. The most recent releases landed on September 9, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Calctronics | E拆 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (5 ratings)](https://appshunter.io/ios/app/calctronics-circuit-calc/id1583972990/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 35 MB | 30 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Anas Abubakar](https://appshunter.io/developer/1581534101) | [China Intelligence Digital (Tianjin) Technology Co., Ltd](https://appshunter.io/developer/1619913914) |

## What reviewers say

### Calctronics

[App page](https://appshunter.io/ios/app/calctronics-circuit-calc/id1583972990)

This app provides a comprehensive suite of calculators and design tools for electronic engineering. It assists with circuit design, filter analysis, and component calculations for resistors, capacitors, and inductors. Ideal for both professionals and students, it simplifies complex electronic projects.

**Highlights:** Comprehensive calculator collection, Filter design with graph plotting, Resistor, transistor, capacitor design tools, Amplifier and inductor design, Circuit analysis and design, Offline functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to the Pro version | $2.99 | one-time |


### E拆

[App page](https://appshunter.io/ios/app/e/id6446301394)

**In-app purchases:** none


## Frequently asked questions

### Is Calctronics free?

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

### Is E拆 free?

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

### Do Calctronics or E拆 have ads?

Calctronics shows ads; E拆 does not.

### Which is updated more often, Calctronics or E拆?

Calctronics ships an update every 2 months, and E拆 every 5 weeks. Most recently, Calctronics was updated on September 9, 2026 and E拆 on September 19, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*