# STEM Connect Pro vs Cool Ukiyo

The clearest difference is in-app purchases: STEM Connect Pro at none against Cool Ukiyo's 1. STEM Connect Pro also leads on ads (none vs shown). Cool Ukiyo's advantage is update cadence (monthly vs every 14 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Cool Ukiyo sells 1 one-off in-app purchase. STEM Connect Pro asks for nothing beyond the download.

STEM Connect Pro ships an update every 14 months, Cool Ukiyo monthly. The most recent releases landed on October 4, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | STEM Connect Pro | Cool Ukiyo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 14 months | **Monthly** |
| Size | 9 MB | 53 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [STEM s.r.l.](https://appshunter.io/developer/1577070000) | [Mihoko Araki](https://appshunter.io/developer/1476136915) |

## What reviewers say

### STEM Connect Pro

[App page](https://appshunter.io/ios/app/stem-connect-pro/id1577069998)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cool Ukiyo

[App page](https://appshunter.io/ios/app/cool-ukiyo-e-clock/id6503263276)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cool Ukiyo-e Clock with no ads | $3.99 | one-time |


## Frequently asked questions

### Is STEM Connect Pro free?

STEM Connect Pro is free to download, with no in-app purchases.

### Is Cool Ukiyo free?

Cool Ukiyo is free to download, with in-app purchases available.

### Do STEM Connect Pro or Cool Ukiyo have ads?

Cool Ukiyo shows ads; STEM Connect Pro does not.

### Which is updated more often, STEM Connect Pro or Cool Ukiyo?

STEM Connect Pro ships an update every 14 months, and Cool Ukiyo monthly. Most recently, STEM Connect Pro was updated on October 4, 2026 and Cool Ukiyo on October 13, 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.*