# HP Secure Authentication vs Poolistry

The clearest difference is in-app purchases: HP Secure Authentication at none against Poolistry's 3. HP Secure Authentication also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). Poolistry's advantage is update cadence (every 5 days vs monthly). On price and device support there is nothing between them.

Both are free to download. Poolistry sells 3 in-app purchases, starting at $1.99 per month. HP Secure Authentication asks for nothing beyond the download.

HP Secure Authentication ships an update monthly, Poolistry every 5 days. Both last shipped on September 9, 2026.

## The numbers

| Metric | HP Secure Authentication | Poolistry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (22 ratings)](https://appshunter.io/ios/app/poolistry-pool-calculator/id6748267875/reviews)** |
| Number of ratings | — | **22** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 29 MB | 52 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DataSec Pty Ltd](https://appshunter.io/developer/1599750991) | [Yonah Systems](https://appshunter.io/developer/1694042531) |

## What reviewers say

### HP Secure Authentication

[App page](https://appshunter.io/ios/app/hp-secure-authentication/id6446355143)

**In-app purchases:** none


### Poolistry

[App page](https://appshunter.io/ios/app/poolistry-pool-calculator/id6748267875)

This app helps pool owners manage water chemistry and maintenance. It offers smart calculators for chemical adjustments, a comprehensive logging system for tests and tasks, and cloud backup for data synchronization across devices. Keep your pool crystal clear with ease.

**Highlights:** Smart chemical adjustment calculators, Water testing and readings log, Chemical addition tracking, Maintenance task logging, Cloud backup and sync, Expense and notes tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Poolistry - Premium - 1 Month | $1.99 | per month |
| Poolistry - Premium - 1 Year | $9.99 | per year |
| Lifetime Premium Access | $59.99 | one-time |


## Frequently asked questions

### Is HP Secure Authentication free?

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

### Is Poolistry free?

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

### Do HP Secure Authentication or Poolistry have ads?

Poolistry shows ads; HP Secure Authentication does not.

### Which is updated more often, HP Secure Authentication or Poolistry?

HP Secure Authentication ships an update monthly, and Poolistry every 5 days. Most recently, HP Secure Authentication was updated on September 9, 2026 and Poolistry 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.*