# PhaseChecker vs ZP 10.8 PRO AMP

The clearest difference is price: ZP 10.8 PRO AMP at Free against PhaseChecker's $0.99. ZP 10.8 PRO AMP also leads on update cadence (fortnightly vs every 43 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

ZP 10.8 PRO AMP is free to download; PhaseChecker costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PhaseChecker ships an update every 43 months, ZP 10.8 PRO AMP fortnightly. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | PhaseChecker | ZP 10.8 PRO AMP |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[2.0 (3 ratings)](https://appshunter.io/ios/app/phasechecker/id1160400348/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 15.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 43 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 1 MB | 2 MB |
| Requires iOS | **14.1** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Rick Peacock](https://appshunter.io/developer/286052385) | [Maslim Djanuanto](https://appshunter.io/developer/1521794441) |

## What reviewers say

### PhaseChecker

[App page](https://appshunter.io/ios/app/phasechecker/id1160400348)

This utility app tests your sound system to ensure speakers are correctly wired and in-phase. It offers manual and automatic modes, with advanced waveform analysis for precise setup. Proper phasing is crucial for optimal bass response and stereo imaging.

**Highlights:** Speaker phase and polarity testing, Manual and automatic test modes, Microphone-based analysis, Waveform view for advanced users, In-app help and guidance, Audio output connection

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

**In-app purchases:** none


### ZP 10.8 PRO AMP

[App page](https://appshunter.io/ios/app/zp-108-pro-amp/id6475811997)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PhaseChecker free?

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

### Is ZP 10.8 PRO AMP free?

ZP 10.8 PRO AMP is free to download, with no in-app purchases.

### Do PhaseChecker or ZP 10.8 PRO AMP have ads?

Neither PhaseChecker nor ZP 10.8 PRO AMP shows ads.

### Which is updated more often, PhaseChecker or ZP 10.8 PRO AMP?

PhaseChecker ships an update every 43 months, and ZP 10.8 PRO AMP fortnightly. Most recently, PhaseChecker was updated on October 29, 2026 and ZP 10.8 PRO AMP on October 27, 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.*