# HD Center vs Sentinel

The clearest difference is update cadence: Sentinel at fortnightly against HD Center's every 4 months. HD Center's advantage is iOS requirement (13.4 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

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

HD Center ships an update every 4 months, Sentinel fortnightly. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | HD Center | Sentinel |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 120 MB | 59 MB |
| Requires iOS | **13.4** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | +4 |
| Developer | [HD CENTER - PROJETOS LOCACOES E SERVICOS LTDA](https://appshunter.io/developer/1627739577) | [Sentinel Desenvolvimento Ltda](https://appshunter.io/developer/1761365452) |

## What reviewers say

### HD Center

[App page](https://appshunter.io/ios/app/hd-center/id6471662969)

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

**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 HD Center free?

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

### Is Sentinel free?

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

### Do HD Center or Sentinel have ads?

Neither HD Center nor Sentinel shows ads.

### Which is updated more often, HD Center or Sentinel?

HD Center ships an update every 4 months, and Sentinel fortnightly. Most recently, HD Center was updated on October 13, 2026 and Sentinel on October 9, 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.*