# SIGMA vs DTicket CA

The clearest difference is update cadence: SIGMA at every 10 months against DTicket CA's every 25 months. DTicket CA's advantage is iOS requirement (9.0 vs 11.0). 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.

SIGMA ships an update every 10 months, DTicket CA every 25 months. The most recent releases landed on October 15, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | SIGMA | DTicket CA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 25 months |
| Size | 22 MB | 11 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ID&A S.r.l.](https://appshunter.io/developer/1446283055) | [GOSTEC SNC DI CHERCHI STEFANO & C.](https://appshunter.io/developer/1377178150) |

## What reviewers say

### SIGMA

[App page](https://appshunter.io/ios/app/sigma-aamps/id1446283056)

**Features:** macOS Compatibility

**In-app purchases:** none


### DTicket CA

[App page](https://appshunter.io/ios/app/dticket-ca/id6472044257)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SIGMA free?

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

### Is DTicket CA free?

DTicket CA is free to download, with no in-app purchases.

### Do SIGMA or DTicket CA have ads?

Neither SIGMA nor DTicket CA shows ads.

### Which is updated more often, SIGMA or DTicket CA?

SIGMA ships an update every 10 months, and DTicket CA every 25 months. Most recently, SIGMA was updated on October 15, 2026 and DTicket CA on October 25, 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.*