# GSM+ Second Phone Number vs Ventilation Systems

The clearest difference is in-app purchases: Ventilation Systems at none against GSM+ Second Phone Number's 21. GSM+ Second Phone Number's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. GSM+ Second Phone Number sells 20 in-app purchases, starting at $3.99 per month. Ventilation Systems asks for nothing beyond the download.

## The numbers

| Metric | GSM+ Second Phone Number | Ventilation Systems |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (758 ratings)](https://appshunter.io/ios/app/gsm-plus-second-phone-number/id1486650699/reviews)** | — |
| Number of ratings | **758** | — |
| Positive reviews | 37.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 3 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 111 MB | 222 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [Mobile Victory](https://appshunter.io/developer/1486650698) | [Artem Stoliarov](https://appshunter.io/developer/1439013528) |

## What reviewers say

### GSM+ Second Phone Number

[App page](https://appshunter.io/ios/app/gsm-plus-second-phone-number/id1486650699)

Obtain multiple virtual phone numbers from over 40 countries without needing an extra SIM card. Use these numbers for calls, texts, and registrations to protect your personal number's privacy. Enjoy affordable international communication and manage your lines easily.

**Highlights:** Multiple virtual phone numbers, Supports 40+ countries, No extra SIM card needed, Make calls and send SMS/MMS, Call recording, Voicemail creation, Call forwarding

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

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Credits Tariff #1 | $3.99 | per month |
| Credits Tariff #3 | $7.99 | per month |
| Credits Tariff #4 | $9.99 | per month |
| Canada - Dual Functionality | $9.99 | per month |
| US - (Call+SMS) | $9.99 | per month |
| GB - (Call+SMS) | $9.99 | per month |
| US- Dual Functionality | $14.99 | per month |
| Canada - Dual Functionality | $14.99 | per month |
| UK - Dual Functionality | $14.99 | per month |
| Auto Credit Tariff #5 | $19.99 | per month |
| Puerto Rico-Dual Functionality | $24.99 | per month |
| Auto Credit Tariff #6 | $29.99 | per month |
| Australia - Dual Functionality | $39.99 | per month |
| GB - (Call+SMS) | $59.99 | per year |
| Phone number purchase | $0.99 | one-time |
| Phone number purchase | $3.99 | one-time |
| Phone number purchase | $9.99 | one-time |
| Phone number purchase | $19.99 | one-time |
| Phone number purchase | $39.99 | one-time |
| Phone number purchase | $69.99 | one-time |

**What reviewers like**

- ⭐ Great app
- 👍 Works well
- 🔥 Excellent service

**What reviewers complain about**

- 🐛 App not working
- 💰 Expensive
- ⚠️ Issues with SMS/calls

**Reported bugs**

- Credits deducted without service
- Numbers becoming inactive quickly

**Requested features**

- Add support for more countries
- Improve customer support


### Ventilation Systems

[App page](https://appshunter.io/ios/app/ventilation-systems-ar/id6471626322)

**In-app purchases:** none


## Frequently asked questions

### Is GSM+ Second Phone Number free?

GSM+ Second Phone Number is free to download, with in-app purchases available.

### Is Ventilation Systems free?

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

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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.*