# Dog Whistle vs Syscope

The clearest difference is in-app purchases: Dog Whistle at none against Syscope's 1. Dog Whistle also leads on iOS requirement (15.0 vs 17.0). Syscope's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Syscope sells 1 one-off in-app purchase. Dog Whistle asks for nothing beyond the download.

Dog Whistle ships an update every 9 days, Syscope every 5 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Dog Whistle | Syscope |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 5 days** |
| Size | 23 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Angel Cilleruelo Rodriguez](https://appshunter.io/developer/1655918605) | [CHUNG-HO LEE](https://appshunter.io/developer/502429481) |

## What reviewers say

### Dog Whistle

[App page](https://appshunter.io/ios/app/dog-whistle-training-sounds/id6813969387)

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

**In-app purchases:** none


### Syscope

[App page](https://appshunter.io/ios/app/syscope/id6814094630)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Syscope Pro | $2.99 | one-time |


## Frequently asked questions

### Is Dog Whistle free?

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

### Is Syscope free?

Syscope is free to download, with in-app purchases available.

### Do Dog Whistle or Syscope have ads?

Dog Whistle shows ads; Syscope does not.

### Which is updated more often, Dog Whistle or Syscope?

Dog Whistle ships an update every 9 days, and Syscope every 5 days. Most recently, Dog Whistle was updated on October 31, 2026 and Syscope on November 6, 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.*