# Circuit Design & Simulation vs DENDOU

The clearest difference is ads: Circuit Design & Simulation at none against DENDOU's shown. Circuit Design & Simulation also leads on update cadence (every 2 days vs every 9 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Circuit Design & Simulation sells 2 in-app purchases, starting at $4.99 per year and DENDOU sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Circuit Design & Simulation ships an update every 2 days, DENDOU every 9 days. Both last shipped on November 13, 2026.

## The numbers

| Metric | Circuit Design & Simulation | DENDOU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/circuit-design-and-simulation/id6822767192/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 9 days |
| Size | 3 MB | 12 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [志义 范](https://appshunter.io/developer/6822509575) | [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) |

## What reviewers say

### Circuit Design & Simulation

[App page](https://appshunter.io/ios/app/circuit-design-and-simulation/id6822767192)

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Membership | $4.99 | per year |
| Lifetime Membership | $14.99 | one-time |


### DENDOU

[App page](https://appshunter.io/ios/app/dendou-circuit-simulator/id6829067497)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $9.99 | one-time |


## Frequently asked questions

### Is Circuit Design & Simulation free?

Circuit Design & Simulation is free to download, with in-app purchases available.

### Is DENDOU free?

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

### Do Circuit Design & Simulation or DENDOU have ads?

DENDOU shows ads; Circuit Design & Simulation does not.

### Which is updated more often, Circuit Design & Simulation or DENDOU?

Circuit Design & Simulation ships an update every 2 days, and DENDOU every 9 days. Most recently, Circuit Design & Simulation was updated on November 13, 2026 and DENDOU on November 13, 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.*