# Duo JK vs Sentinel

The clearest difference is iOS requirement: Duo JK at 13.0 against Sentinel's 16.4. On price and in-app purchases there is nothing between them.

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

## The numbers

| Metric | Duo JK | Sentinel |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Fortnightly |
| Monetization | — | Free |
| Size | 165 MB | 59 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | — | **iPhone** |
| Age rating | 4+ | +4 |
| Developer | [liveFacilities](https://appshunter.io/developer/933557362) | [Sentinel Desenvolvimento Ltda](https://appshunter.io/developer/1761365452) |

## What reviewers say

### Duo JK

[App page](https://appshunter.io/ios/app/duo-jk/id6463688068)

**In-app purchases:** none


### Sentinel

[App page](https://appshunter.io/ios/app/sentinel/id6612033669)

Manage your condominium's daily life with ease. Send visitor invitations, track deliveries, reserve common areas, and access important documents. Stay informed with official announcements and manage requests efficiently.

**Highlights:** Visitor invitations and real-time authorization, Package and mail tracking, Common area reservations, Activity and class sign-ups, Occurrence and request management, Official announcements and digital bulletin board, Access to condominium documents

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

**In-app purchases:** none


## Frequently asked questions

### Is Duo JK free?

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

### Is Sentinel free?

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

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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.*