# PowerMaster vs CallCentersBlock

The clearest difference is price: PowerMaster at Free against CallCentersBlock's $0.99. PowerMaster also leads on iOS requirement (12.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

PowerMaster is free to download; CallCentersBlock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | PowerMaster | CallCentersBlock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Size | 52 MB | 1 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Cyber Energy Co., Ltd.](https://appshunter.io/developer/1463752550) | [VINCENZO RENZO](https://appshunter.io/developer/1822070489) |

## What reviewers say

### PowerMaster

[App page](https://appshunter.io/ios/app/powermaster/id1463752551)

**Features:** macOS Compatibility

**In-app purchases:** none


### CallCentersBlock

[App page](https://appshunter.io/ios/app/callcentersblock/id6813885330)

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

**In-app purchases:** none


## Frequently asked questions

### Is PowerMaster free?

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

### Is CallCentersBlock free?

CallCentersBlock costs $0.99, with no in-app purchases.

### Do PowerMaster or CallCentersBlock have ads?

Neither PowerMaster nor CallCentersBlock shows ads.

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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.*