# GDS CATS vs SecureVOIP

The clearest difference is iOS requirement: SecureVOIP at 13.0 against GDS CATS's 15.0. 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.

GDS CATS ships an update every 24 months, SecureVOIP every 21 months. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | GDS CATS | SecureVOIP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 21 months** |
| Size | 1 MB | 113 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Stewart](https://appshunter.io/developer/1012982526) | [Ray Jackson](https://appshunter.io/developer/892225827) |

## What reviewers say

### GDS CATS

[App page](https://appshunter.io/ios/app/gds-cats/id1317958523)

**Features:** macOS Compatibility

**In-app purchases:** none


### SecureVOIP

[App page](https://appshunter.io/ios/app/securevoip/id1479360405)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GDS CATS free?

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

### Is SecureVOIP free?

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

### Do GDS CATS or SecureVOIP have ads?

Neither GDS CATS nor SecureVOIP shows ads.

### Which is updated more often, GDS CATS or SecureVOIP?

GDS CATS ships an update every 24 months, and SecureVOIP every 21 months. Most recently, GDS CATS was updated on October 9, 2026 and SecureVOIP on October 16, 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.*