# STEM Connect vs PK

The clearest difference is update cadence: STEM Connect at weekly against PK's every 6 months. STEM Connect also leads on iOS requirement (12.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

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

STEM Connect ships an update weekly, PK every 6 months. The most recent releases landed on September 11, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | STEM Connect | PK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 months |
| Size | 32 MB | 142 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [STEM s.r.l.](https://appshunter.io/developer/1577070000) | [City of Poughkeepsie](https://appshunter.io/developer/1769025188) |

## What reviewers say

### STEM Connect

[App page](https://appshunter.io/ios/app/stem-connect/id1577509982)

**Features:** macOS Compatibility

**In-app purchases:** none


### PK

[App page](https://appshunter.io/ios/app/pk-connect/id6745569374)

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

**In-app purchases:** none


## Frequently asked questions

### Is STEM Connect free?

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

### Is PK free?

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

### Do STEM Connect or PK have ads?

Neither STEM Connect nor PK shows ads.

### Which is updated more often, STEM Connect or PK?

STEM Connect ships an update weekly, and PK every 6 months. Most recently, STEM Connect was updated on September 11, 2026 and PK on September 9, 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.*