# Zervers vs Sentinel by Ladris

The clearest difference is iOS requirement: Zervers at 11.0 against Sentinel by Ladris's 16.4. On price, update cadence, ads 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.

Zervers ships an update every 3 weeks, Sentinel by Ladris fortnightly. The most recent releases landed on May 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Zervers | Sentinel by Ladris |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (13 ratings)](https://appshunter.io/ios/app/sentinel-by-ladris/id6746508148/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | — | Free |
| Size | 65 MB | 74 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [EQUAL INFOTECH PRIVATE LIMITED](https://appshunter.io/developer/1534260659) | [Ladris](https://appshunter.io/developer/1817212625) |

## What reviewers say

### Zervers

[App page](https://appshunter.io/ios/app/zervers/id6446360320)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sentinel by Ladris

[App page](https://appshunter.io/ios/app/sentinel-by-ladris/id6746508148)

Understand your risk level and stay prepared for emergencies in important locations. Get actionable information on hazards like fire, flood, and heat, with location-aware alerts and evacuation readiness scores. Developed with public safety experts.

**Highlights:** Risk scores for multiple locations, Active zone alerts (evacuations, warnings), Location-aware push notifications, Evacuation readiness scoring, Hazard risk breakdown, Dynamic advisories from authorities, No account required

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

**In-app purchases:** none


## Frequently asked questions

### Is Zervers free?

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

### Is Sentinel by Ladris free?

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

### Do Zervers or Sentinel by Ladris have ads?

Neither Zervers nor Sentinel by Ladris shows ads.

### Which is updated more often, Zervers or Sentinel by Ladris?

Zervers ships an update every 3 weeks, and Sentinel by Ladris fortnightly. Most recently, Zervers was updated on May 14, 2026 and Sentinel by Ladris on October 10, 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.*