# Secure Volunteer vs HPU

The clearest difference is review sentiment: HPU at 100% against Secure Volunteer's 8%. HPU also leads on rating (5.0 vs 2.0). Secure Volunteer's advantage is ratings volume (30 vs 4) and iOS requirement (14 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

HPU holds the better App Store score, 5.0 against 2.0. That said, the two scores are not equally well evidenced: Secure Volunteer has 30 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 8% of Secure Volunteer's written reviews are positive against 100% of HPU's.

## The numbers

| Metric | Secure Volunteer | HPU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (30 ratings)](https://appshunter.io/ios/app/secure-volunteer/id1659827767/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/hpu-9000/id6793785945/reviews)** |
| Number of ratings | **30** | 4 |
| Positive reviews | 7.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free | Free |
| Size | 63 MB | 2 MB |
| Requires iOS | **14** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Background Investigation Bureau, LLC](https://appshunter.io/developer/1659827769) | [LOBOZ LLC](https://appshunter.io/developer/6793785947) |

## What reviewers say

### Secure Volunteer

[App page](https://appshunter.io/ios/app/secure-volunteer/id1659827767)

Easily access and display your volunteer ID cards digitally. Search for your card using provided details or a unique code. Avoid the need for printed cards at volunteer opportunities.

**Highlights:** Digital volunteer ID cards, Search by details or code, No printed cards needed, Access for various organizations, Secure background check integration

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

**In-app purchases:** none


### HPU

[App page](https://appshunter.io/ios/app/hpu-9000/id6793785945)

This app provides fluid power engineers with essential formulas and calculators in a retro CRT terminal interface. It offers tools for cylinders, pumps, motors, vehicle drive sizing, fluids, and thermal calculations, with unit conversion and formula references. It works offline and requires no account.

**Highlights:** 21 live calculators for fluid power engineering, US and metric unit switching, Cylinder, pump, and motor calculations, Vehicle drive sizing worksheet, Fluid and thermal calculations, Unit converter and formula reference, Offline functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Secure Volunteer free?

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

### Is HPU free?

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

### Which has better reviews, Secure Volunteer or HPU?

HPU is rated higher. Secure Volunteer averages 2.0 out of 5 from 30 ratings, while HPU averages 5.0 from 4 ratings.

### Do Secure Volunteer or HPU have ads?

Neither Secure Volunteer nor HPU shows ads.

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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.*