# Phase Calc vs Circuit Design

The clearest difference is in-app purchases: Phase Calc at none against Circuit Design's 3. Circuit Design's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. Circuit Design sells 3 in-app purchases, starting at $7.99 per month. Phase Calc asks for nothing beyond the download.

## The numbers

| Metric | Phase Calc | Circuit Design |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 2 months |
| Size | 13 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Donnie Herman](https://appshunter.io/developer/837266303) | [Tu Anh Do](https://appshunter.io/developer/738947045) |

## What reviewers say

### Phase Calc

[App page](https://appshunter.io/ios/app/phase-calc-lite/id6760266074)

**In-app purchases:** none


### Circuit Design

[App page](https://appshunter.io/ios/app/circuit-design/id6776538242)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Circuit Design Premium Monthly | $7.99 | per month |
| Circuit Design Premium Yearly | $29.99 | per year |
| Circuit Design Premium Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Phase Calc free?

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

### Is Circuit Design free?

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

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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.*