# SigmaAPP vs Astra

The clearest difference is update cadence: SigmaAPP at every 2 months against Astra's every 28 months. Astra's advantage is iOS requirement (12.0 vs 15.6). 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.

SigmaAPP ships an update every 2 months, Astra every 28 months. The most recent releases landed on October 11, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | SigmaAPP | Astra |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 28 months |
| Size | 62 MB | 69 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | +4 | 4+ |
| Developer | [Dzigne Sistemas e Tecnologia LTDA ME](https://appshunter.io/developer/650792218) | [Promont Solucoes Ltds](https://appshunter.io/developer/1450762911) |

## What reviewers say

### SigmaAPP

[App page](https://appshunter.io/ios/app/sigmaapp/id1449513233)

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

**In-app purchases:** none


### Astra

[App page](https://appshunter.io/ios/app/astra/id1579549185)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SigmaAPP free?

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

### Is Astra free?

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

### Do SigmaAPP or Astra have ads?

Neither SigmaAPP nor Astra shows ads.

### Which is updated more often, SigmaAPP or Astra?

SigmaAPP ships an update every 2 months, and Astra every 28 months. Most recently, SigmaAPP was updated on October 11, 2026 and Astra on October 1, 2026.

---

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