# VoipSwitch PBX vs CSS Microtec

VoipSwitch PBX and CSS Microtec 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.

VoipSwitch PBX ships an update every 4 months, CSS Microtec every 3 months. The most recent releases landed on September 12, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | VoipSwitch PBX | CSS Microtec |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Size | 58 MB | 42 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Voiceserve Ltd](https://appshunter.io/developer/331290997) | [Vanhuy Do](https://appshunter.io/developer/1123517604) |

## What reviewers say

### VoipSwitch PBX

[App page](https://appshunter.io/ios/app/voipswitch-pbx/id1169562495)

**Features:** macOS Compatibility

**In-app purchases:** none


### CSS Microtec

[App page](https://appshunter.io/ios/app/css-microtec/id1467123311)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VoipSwitch PBX free?

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

### Is CSS Microtec free?

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

### Do VoipSwitch PBX or CSS Microtec have ads?

Neither VoipSwitch PBX nor CSS Microtec shows ads.

### Which is updated more often, VoipSwitch PBX or CSS Microtec?

VoipSwitch PBX ships an update every 4 months, and CSS Microtec every 3 months. Most recently, VoipSwitch PBX was updated on September 12, 2026 and CSS Microtec on September 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.*