# PSI Access vs Decision Engine

The clearest difference is rating: Decision Engine at 5.0 against PSI Access's 4.0. Decision Engine also leads on iOS requirement (13.0 vs 15.0). PSI Access's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, 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.

Decision Engine holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: PSI Access has 8 ratings behind it against 1, so its average is the more settled of the two.

PSI Access ships an update every 6 weeks, Decision Engine monthly. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | PSI Access | Decision Engine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (8 ratings)](https://appshunter.io/ios/app/psi-access/id1460353930/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/decision-engine/id6444162467/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | **Free** | Ad-supported |
| Size | 152 MB | 54 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PSSolutions-LLC](https://appshunter.io/developer/1460353929) | [3DOFT Ventures LLC](https://appshunter.io/developer/1652703926) |

## What reviewers say

### PSI Access

[App page](https://appshunter.io/ios/app/psi-access/id1460353930)

Manage inspections, testing, and preventative maintenance tasks from your mobile device. Access process safety information, create action items, and generate safe work permits in the field. The app supports offline use and automatically syncs data.

**Highlights:** Execute inspections, testing, and maintenance tasks, Create safe work permits, Access Process Safety Information (PSI), Offline data sync, Assign and receive task notifications

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

**In-app purchases:** none


### Decision Engine

[App page](https://appshunter.io/ios/app/decision-engine/id6444162467)

This app offers a fun and fast way to gather feedback on any topic, serving as an alternative to traditional surveys. Users can make choices, view instant results, and compare or share them. It's ideal for picking preferences, creating lists, and understanding opinions.

**Highlights:** Collect customer feedback, Gather employee opinions, Create preference lists, Instant results, Shareable outcomes, Fun alternative to surveys

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PSI Access free?

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

### Is Decision Engine free?

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

### Which has better reviews, PSI Access or Decision Engine?

Decision Engine is rated higher. PSI Access averages 4.0 out of 5 from 8 ratings, while Decision Engine averages 5.0 from 1 ratings.

### Do PSI Access or Decision Engine have ads?

Decision Engine shows ads; PSI Access does not.

### Which is updated more often, PSI Access or Decision Engine?

PSI Access ships an update every 6 weeks, and Decision Engine monthly. Most recently, PSI Access was updated on October 10, 2026 and Decision Engine on September 30, 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.*