# phase estimation algorithm vs Smith Chart Touch

The clearest difference is update cadence: phase estimation algorithm at monthly against Smith Chart Touch's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

phase estimation algorithm ships an update monthly, Smith Chart Touch every 3 months. The most recent releases landed on October 10, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | phase estimation algorithm | Smith Chart Touch |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Size | 12 MB | 22 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [Sthefano Schiavon](https://appshunter.io/developer/1882733645) |

## What reviewers say

### phase estimation algorithm

[App page](https://appshunter.io/ios/app/phase-estimation-algorithm/id6469448415)

**Features:** macOS Compatibility

**In-app purchases:** none


### Smith Chart Touch

[App page](https://appshunter.io/ios/app/smith-chart-touch/id6760685457)

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

**In-app purchases:** none


## Frequently asked questions

### Is phase estimation algorithm free?

phase estimation algorithm is free to download, with no in-app purchases.

### Is Smith Chart Touch free?

Smith Chart Touch is free to download, with no in-app purchases.

### Do phase estimation algorithm or Smith Chart Touch have ads?

Neither phase estimation algorithm nor Smith Chart Touch shows ads.

### Which is updated more often, phase estimation algorithm or Smith Chart Touch?

phase estimation algorithm ships an update monthly, and Smith Chart Touch every 3 months. Most recently, phase estimation algorithm was updated on October 10, 2026 and Smith Chart Touch on October 20, 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.*