# Electronic Circuit Calculator vs TTsolar

The clearest difference is rating: TTsolar at 5.0 against Electronic Circuit Calculator's 4.0. TTsolar also leads on in-app purchases (none vs 1) and ads (none vs shown). Electronic Circuit Calculator's advantage is update cadence (every 2 months vs every 7 months) and ratings volume (5 vs 1). On price, monetization model and device support there is nothing between them.

Both are free to download. Electronic Circuit Calculator sells 1 one-off in-app purchase. TTsolar asks for nothing beyond the download.

TTsolar holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Electronic Circuit Calculator has 5 ratings behind it against 1, so its average is the more settled of the two.

Electronic Circuit Calculator ships an update every 2 months, TTsolar every 7 months. The most recent releases landed on October 22, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Electronic Circuit Calculator | TTsolar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (5 ratings)](https://appshunter.io/ios/app/electronic-circuit-calculator/id1583972990/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ttsolar-cloud/id6755569814/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 37 MB | 67 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Anas Abubakar](https://appshunter.io/developer/1581534101) | [建孟 罗](https://appshunter.io/developer/1846487648) |

## What reviewers say

### Electronic Circuit Calculator

[App page](https://appshunter.io/ios/app/electronic-circuit-calculator/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 |


### TTsolar

[App page](https://appshunter.io/ios/app/ttsolar-cloud/id6755569814)

This platform is designed for users of the Jiamei Tianhe Yuan power station to manage and maintain their facilities. It provides a centralized system for operational oversight and upkeep.

**Highlights:** Power station maintenance, User platform, Facility management, Operational oversight, Upkeep system

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

**In-app purchases:** none


## Frequently asked questions

### Is Electronic Circuit Calculator free?

Electronic Circuit Calculator is free to download, with in-app purchases available.

### Is TTsolar free?

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

### Which has better reviews, Electronic Circuit Calculator or TTsolar?

TTsolar is rated higher. Electronic Circuit Calculator averages 4.0 out of 5 from 5 ratings, while TTsolar averages 5.0 from 1 ratings.

### Do Electronic Circuit Calculator or TTsolar have ads?

Electronic Circuit Calculator shows ads; TTsolar does not.

### Which is updated more often, Electronic Circuit Calculator or TTsolar?

Electronic Circuit Calculator ships an update every 2 months, and TTsolar every 7 months. Most recently, Electronic Circuit Calculator was updated on October 22, 2026 and TTsolar on October 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.*