# PROS Clock vs RYB Color meter

The clearest difference is iOS requirement: PROS Clock at 13.0 against RYB Color meter's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PROS Clock ships an update monthly, RYB Color meter every 3 weeks. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | PROS Clock | RYB Color meter |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 30 MB | 40 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen PROS Electronics Co.,Ltd](https://appshunter.io/developer/1798637623) | [ERIK FRANKLIN ANGERSTIG](https://appshunter.io/developer/1885401386) |

## What reviewers say

### PROS Clock

[App page](https://appshunter.io/ios/app/pros-clock/id6742538787)

This app enhances a smart calendar clock, offering specialized support for elderly individuals, including those with dementia, Alzheimer's, or memory loss. It aims to provide better care and usability for users of the smart calendar clock.

**Highlights:** Smart calendar clock integration, Elderly care support, Dementia and Alzheimer's assistance, Memory loss aid, Improved user experience for seniors

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

**In-app purchases:** none


### RYB Color meter

[App page](https://appshunter.io/ios/app/ryb-color-meter/id6760628228)

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

**In-app purchases:** none


## Frequently asked questions

### Is PROS Clock free?

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

### Is RYB Color meter free?

RYB Color meter is free to download, with no in-app purchases.

### Do PROS Clock or RYB Color meter have ads?

Neither PROS Clock nor RYB Color meter shows ads.

### Which is updated more often, PROS Clock or RYB Color meter?

PROS Clock ships an update monthly, and RYB Color meter every 3 weeks. Most recently, PROS Clock was updated on October 10, 2026 and RYB Color meter on October 12, 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.*