# PrivateWave Professional vs GMT Doorlock

The clearest difference is iOS requirement: GMT Doorlock at 9.0 against PrivateWave Professional's 11.0. 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.

PrivateWave Professional ships an update every 5 weeks, GMT Doorlock every 6 weeks. The most recent releases landed on October 23, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | PrivateWave Professional | GMT Doorlock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/privatewave-professional/id401908184/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | Free | — |
| Size | 28 MB | 39 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [BV TECH SPA](https://appshunter.io/developer/1787905127) | [JSW PACIFIC CORPORATION](https://appshunter.io/developer/999731327) |

## What reviewers say

### PrivateWave Professional

[App page](https://appshunter.io/ios/app/privatewave-professional/id401908184)

Securely encrypt your calls using VoIP technology. This app allows for encrypted communication between users who also have the software installed, offering robust security features and low bandwidth usage. It is designed for business and personal use where call privacy is paramount.

**Highlights:** End-to-end voice encryption (ZRTP), Signaling protection (SIP/TLS), Mutual authentication with X.509 certificates, Low bandwidth usage, Extremely low battery drain, Supports various IP-enabled networks

**In-app purchases:** none


### GMT Doorlock

[App page](https://appshunter.io/ios/app/gmt-doorlock/id1469340231)

**In-app purchases:** none


## Frequently asked questions

### Is PrivateWave Professional free?

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

### Is GMT Doorlock free?

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

### Do PrivateWave Professional or GMT Doorlock have ads?

Neither PrivateWave Professional nor GMT Doorlock shows ads.

### Which is updated more often, PrivateWave Professional or GMT Doorlock?

PrivateWave Professional ships an update every 5 weeks, and GMT Doorlock every 6 weeks. Most recently, PrivateWave Professional was updated on October 23, 2026 and GMT Doorlock on October 8, 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.*