# Lake Observer vs BayesMobile

The clearest difference is in-app purchases: Lake Observer 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. Lake Observer asks for nothing beyond the download.

Lake Observer ships an update every 2 months, BayesMobile every 6 weeks. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Lake Observer | BayesMobile |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Size | 57 MB | 9 MB |
| Requires iOS | 15.6 | **14.7** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Cary Institute of Ecosystem Studies, Inc.](https://appshunter.io/developer/1191994757) | [Bayesfusion](https://appshunter.io/developer/1422674280) |

## What reviewers say

### Lake Observer

[App page](https://appshunter.io/ios/app/lake-observer/id961878517)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Lake Observer free?

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

### Is BayesMobile free?

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

### Do Lake Observer or BayesMobile have ads?

Neither Lake Observer nor BayesMobile shows ads.

### Which is updated more often, Lake Observer or BayesMobile?

Lake Observer ships an update every 2 months, and BayesMobile every 6 weeks. Most recently, Lake Observer was updated on October 24, 2026 and BayesMobile on October 14, 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.*