# Prolight + Sound Guangzhou vs P

The clearest difference is price: Prolight + Sound Guangzhou at Free against P's $0.99. P's advantage is ads (none vs shown). On update cadence, in-app purchases, device support and iOS requirement there is nothing between them.

Prolight + Sound Guangzhou is free to download; P costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Prolight + Sound Guangzhou ships an update every 13 months, P every 11 months. The most recent releases landed on September 14, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Prolight + Sound Guangzhou | P |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 13 months | **Every 11 months** |
| Monetization | — | Paid |
| Size | 83 MB | 6 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Messe Frankfurt (HK) Ltd.](https://appshunter.io/developer/575433578) | [Yoshiaki Onishi](https://appshunter.io/developer/852893746) |

## What reviewers say

### Prolight + Sound Guangzhou

[App page](https://appshunter.io/ios/app/prolight-plus-sound-guangzhou/id807374447)

**Features:** macOS Compatibility

**In-app purchases:** none


### P

[App page](https://appshunter.io/ios/app/p-timer/id1041803365)

This app provides a customizable timer for presentations, lectures, and speeches. It features customizable alerts for target time and overages, a history log, and multiple sound options. It's also useful for sports, studying, and work.

**Highlights:** Customizable target time alerts, Overtime alerts with multiple sounds, History log for past sessions, Analog and digital time display, Multiple sound options (bell, gong), Adjustable time limits

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

**In-app purchases:** none


## Frequently asked questions

### Is Prolight + Sound Guangzhou free?

Prolight + Sound Guangzhou is free to download, with no in-app purchases.

### Is P free?

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

### Do Prolight + Sound Guangzhou or P have ads?

Prolight + Sound Guangzhou shows ads; P does not.

### Which is updated more often, Prolight + Sound Guangzhou or P?

Prolight + Sound Guangzhou ships an update every 13 months, and P every 11 months. Most recently, Prolight + Sound Guangzhou was updated on September 14, 2026 and P on September 21, 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.*