# Ziva vs OnSiren

The clearest difference is ads: OnSiren at none against Ziva's shown. OnSiren also leads on monetization model (free vs free with in-app purchases). On price, review sentiment, update cadence 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.

Ziva ships an update every 8 days, OnSiren weekly. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ziva | OnSiren |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **60.0% of reviews** | 53.3% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 83 MB | 128 MB |
| Requires iOS | **15.5** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Ziva Social](https://appshunter.io/developer/1820398668) | [OnSiren Limited](https://appshunter.io/developer/6795174860) |

## What reviewers say

### Ziva

[App page](https://appshunter.io/ios/app/ziva/id6747252802)

Discover new people and groups for social outings. Create or join groups with friends to connect with others nearby for events or casual meetups. It offers a natural way to expand your social circle.

**Highlights:** Group creation and management, Discover nearby groups, Connect with other groups, Event planning, Meet new people together

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

**In-app purchases:** none


### OnSiren

[App page](https://appshunter.io/ios/app/onsiren/id6795977065)

This platform provides real-time shared awareness and threat intelligence for UK security officers. It briefs users on local events, allows for quick incident reporting, and offers push-to-talk communication with nearby colleagues. Membership requires a valid SIA license.

**Highlights:** Real-time threat intelligence briefings, Quick incident reporting with location, Push-to-talk communication, Shared awareness network for security officers, AI-powered local event updates

**In-app purchases:** none


## Frequently asked questions

### Is Ziva free?

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

### Is OnSiren free?

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

### Do Ziva or OnSiren have ads?

Ziva shows ads; OnSiren does not.

### Which is updated more often, Ziva or OnSiren?

Ziva ships an update every 8 days, and OnSiren weekly. Most recently, Ziva was updated on October 28, 2026 and OnSiren on October 31, 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.*