# OPQ Tool vs STEM by Smart Space

The clearest difference is update cadence: STEM by Smart Space at every 2 weeks against OPQ Tool's every 2 months. OPQ Tool's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

OPQ Tool ships an update every 2 months, STEM by Smart Space every 2 weeks. The most recent releases landed on September 14, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | OPQ Tool | STEM by Smart Space |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 58 MB | 44 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nishan Mills](https://appshunter.io/developer/1524154635) | [Smart Space Automation Pty Limited](https://appshunter.io/developer/1661244254) |

## What reviewers say

### OPQ Tool

[App page](https://appshunter.io/ios/app/opq-tool/id6444591782)

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

**In-app purchases:** none


### STEM by Smart Space

[App page](https://appshunter.io/ios/app/stem-by-smart-space/id6449656608)

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is OPQ Tool free?

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

### Is STEM by Smart Space free?

STEM by Smart Space is free to download, with no in-app purchases.

### Do OPQ Tool or STEM by Smart Space have ads?

Neither OPQ Tool nor STEM by Smart Space shows ads.

### Which is updated more often, OPQ Tool or STEM by Smart Space?

OPQ Tool ships an update every 2 months, and STEM by Smart Space every 2 weeks. Most recently, OPQ Tool was updated on September 14, 2026 and STEM by Smart Space on September 8, 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.*