# Sigma Charge vs AlphaTech Plotter

Sigma Charge and AlphaTech Plotter are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Sigma Charge ships an update monthly, AlphaTech Plotter every 6 weeks. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Sigma Charge | AlphaTech Plotter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Size | 54 MB | 24 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Sigma Systems, Mmc](https://appshunter.io/developer/1726343396) | [Elchin Isayev](https://appshunter.io/developer/1857252479) |

## What reviewers say

### Sigma Charge

[App page](https://appshunter.io/ios/app/sigma-charge/id6476268128)

**Features:** macOS Compatibility

**In-app purchases:** none


### AlphaTech Plotter

[App page](https://appshunter.io/ios/app/alphatech-plotter/id6755915016)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sigma Charge free?

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

### Is AlphaTech Plotter free?

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

### Do Sigma Charge or AlphaTech Plotter have ads?

Neither Sigma Charge nor AlphaTech Plotter shows ads.

### Which is updated more often, Sigma Charge or AlphaTech Plotter?

Sigma Charge ships an update monthly, and AlphaTech Plotter every 6 weeks. Most recently, Sigma Charge was updated on September 10, 2026 and AlphaTech Plotter on September 17, 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.*