# BSW Tandem vs Sentinel K9

BSW Tandem and Sentinel K9 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

BSW Tandem ships an update weekly, Sentinel K9 every 4 days. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | BSW Tandem | Sentinel K9 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sentinel-k9/id6795838263/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Size | 43 MB | 45 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Baylor Scott and White Holdings](https://appshunter.io/developer/1000856978) | [BusyPaws](https://appshunter.io/developer/1719876170) |

## What reviewers say

### BSW Tandem

[App page](https://appshunter.io/ios/app/bsw-tandem/id6777144530)

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

**In-app purchases:** none


### Sentinel K9

[App page](https://appshunter.io/ios/app/sentinel-k9/id6795838263)

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

**In-app purchases:** none


## Frequently asked questions

### Is BSW Tandem free?

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

### Is Sentinel K9 free?

Sentinel K9 is free to download, with no in-app purchases.

### Do BSW Tandem or Sentinel K9 have ads?

Neither BSW Tandem nor Sentinel K9 shows ads.

### Which is updated more often, BSW Tandem or Sentinel K9?

BSW Tandem ships an update weekly, and Sentinel K9 every 4 days. Most recently, BSW Tandem was updated on October 7, 2026 and Sentinel K9 on October 24, 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.*