# BayesMobile vs Ariv

The clearest difference is in-app purchases: Ariv at none against BayesMobile's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. BayesMobile sells 1 one-off in-app purchase. Ariv asks for nothing beyond the download.

BayesMobile ships an update every 6 weeks, Ariv every 2 months. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | BayesMobile | Ariv |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Size | 9 MB | 37 MB |
| Requires iOS | **14.7** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Bayesfusion](https://appshunter.io/developer/1422674280) | [Ariv Studios](https://appshunter.io/developer/1881812958) |

## 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 |


### Ariv

[App page](https://appshunter.io/ios/app/ariv-notes-pkm-second-brain/id6776939051)

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

**In-app purchases:** none


## Frequently asked questions

### Is BayesMobile free?

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

### Is Ariv free?

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

### Do BayesMobile or Ariv have ads?

Neither BayesMobile nor Ariv shows ads.

### Which is updated more often, BayesMobile or Ariv?

BayesMobile ships an update every 6 weeks, and Ariv every 2 months. Most recently, BayesMobile was updated on November 11, 2026 and Ariv on November 5, 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.*