# King Sound vs Smart Watch Notes Pro

The clearest difference is price: King Sound at Free against Smart Watch Notes Pro's $2.99. King Sound also leads on iOS requirement (9.0 vs 18.2). Smart Watch Notes Pro's advantage is update cadence (every 2 weeks vs every 22 months). On ads, in-app purchases and device support there is nothing between them.

King Sound is free to download; Smart Watch Notes Pro costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

King Sound ships an update every 22 months, Smart Watch Notes Pro every 2 weeks. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | King Sound | Smart Watch Notes Pro |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 2 weeks** |
| Size | 19 MB | 3 MB |
| Requires iOS | **9.0** | 18.2 |
| Devices | iPhone, iPad, iPod | iPhone, Mac, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Waytronic Electronics Company Limited](https://appshunter.io/developer/1103554270) | [Christopher Riches](https://appshunter.io/developer/1464887687) |

## What reviewers say

### King Sound

[App page](https://appshunter.io/ios/app/king-sound/id1437709752)

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Watch Notes Pro

[App page](https://appshunter.io/ios/app/smart-watch-notes-pro/id6742542265)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is King Sound free?

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

### Is Smart Watch Notes Pro free?

Smart Watch Notes Pro costs $2.99, with no in-app purchases.

### Do King Sound or Smart Watch Notes Pro have ads?

Neither King Sound nor Smart Watch Notes Pro shows ads.

### Which is updated more often, King Sound or Smart Watch Notes Pro?

King Sound ships an update every 22 months, and Smart Watch Notes Pro every 2 weeks. Most recently, King Sound was updated on October 26, 2026 and Smart Watch Notes Pro on October 25, 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.*