# BayesMobile vs Sigma Domain

The clearest difference is update cadence: Sigma Domain at every 2 days against BayesMobile's every 6 weeks. BayesMobile's advantage is iOS requirement (14.7 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. BayesMobile sells 1 one-off in-app purchase and Sigma Domain sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

BayesMobile ships an update every 6 weeks, Sigma Domain every 2 days. The most recent releases landed on November 11, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | BayesMobile | Sigma Domain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Size | 9 MB | 73 MB |
| Requires iOS | **14.7** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Bayesfusion](https://appshunter.io/developer/1422674280) | [Sigma Domain](https://appshunter.io/developer/1876019749) |

## What reviewers say

### BayesMobile

[App page](https://appshunter.io/ios/app/bayesmobile/id1422674281)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| External Model Loading | $9.99 | one-time |


### Sigma Domain

[App page](https://appshunter.io/ios/app/sigma-domain/id6751211704)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Monthly Sigma Domain | $5.99 | per month |
| Additional Usage - Sigma Domain | $9.99 | one-time |


## Frequently asked questions

### Is BayesMobile free?

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

### Is Sigma Domain free?

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

### Do BayesMobile or Sigma Domain have ads?

Neither BayesMobile nor Sigma Domain shows ads.

### Which is updated more often, BayesMobile or Sigma Domain?

BayesMobile ships an update every 6 weeks, and Sigma Domain every 2 days. Most recently, BayesMobile was updated on November 11, 2026 and Sigma Domain on October 28, 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.*