# Sigma CVI vs eSign

The clearest difference is in-app purchases: Sigma CVI at none against eSign's 1. Sigma CVI also leads on ads (none vs shown) and device support (3 vs 1). eSign's advantage is update cadence (fortnightly vs every 15 months). On price there is nothing between them.

Both are free to download. eSign sells 1 in-app purchase, starting at $7.99 per 7 days. Sigma CVI asks for nothing beyond the download.

Sigma CVI ships an update every 15 months, eSign fortnightly. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Sigma CVI | eSign |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Fortnightly** |
| Size | 22 MB | 14 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [ID&A S.r.l.](https://appshunter.io/developer/1446283055) | [Mackenzie Medina](https://appshunter.io/developer/1840625440) |

## What reviewers say

### Sigma CVI

[App page](https://appshunter.io/ios/app/sigma-cvi/id1554823358)

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

**In-app purchases:** none


### eSign

[App page](https://appshunter.io/ios/app/esign-signature-maker-plus/id6752773683)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $7.99 | per 7 days |


## Frequently asked questions

### Is Sigma CVI free?

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

### Is eSign free?

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

### Do Sigma CVI or eSign have ads?

eSign shows ads; Sigma CVI does not.

### Which is updated more often, Sigma CVI or eSign?

Sigma CVI ships an update every 15 months, and eSign fortnightly. Most recently, Sigma CVI was updated on October 25, 2026 and eSign on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*