# Down4App vs OnSiren

Down4App and OnSiren 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.

Down4App ships an update every 2 weeks, OnSiren weekly. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Down4App | OnSiren |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Size | 93 MB | 124 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Down4 Limited](https://appshunter.io/developer/1869393369) | [OnSiren Limited](https://appshunter.io/developer/6795174860) |

## What reviewers say

### Down4App

[App page](https://appshunter.io/ios/app/down4app/id6757869768)

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

**In-app purchases:** none


### OnSiren

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

**In-app purchases:** none


## Frequently asked questions

### Is Down4App free?

Down4App is free to download, with no in-app purchases.

### Is OnSiren free?

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

### Do Down4App or OnSiren have ads?

Neither Down4App nor OnSiren shows ads.

### Which is updated more often, Down4App or OnSiren?

Down4App ships an update every 2 weeks, and OnSiren weekly. Most recently, Down4App was updated on October 10, 2026 and OnSiren on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*