# Poolsure Mobile vs Cornerstone Cards

The clearest difference is rating: Cornerstone Cards at 5.0 against Poolsure Mobile's 4.0. Cornerstone Cards also leads on iOS requirement (13.4 vs 15.0). Poolsure Mobile's advantage is update cadence (weekly vs every 3 weeks) and ratings volume (4 vs 1). 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.

Cornerstone Cards holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Poolsure Mobile ships an update weekly, Cornerstone Cards every 3 weeks. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Poolsure Mobile | Cornerstone Cards |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/poolsure-mobile/id1545322311/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cornerstone-cards/id6526466459/reviews)** |
| Number of ratings | **4** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 166 MB | 21 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Poolsure, a division of Aquasol Controllers, Inc.](https://appshunter.io/developer/1545322313) | [Andrew Hicks](https://appshunter.io/developer/538725021) |

## What reviewers say

### Poolsure Mobile

[App page](https://appshunter.io/ios/app/poolsure-mobile/id1545322311)

This app helps pool owners track chemical levels and receive automated calculations for saturation index and chemical recommendations. It simplifies pool maintenance by eliminating manual calculations and providing vital pool information.

**Highlights:** Daily pool log entries, Automated saturation index calculation, Chemical dosage recommendations, View tank levels and chemical readings, Sync with Spin Touch, View active alerts

**Features:** Vision Pro support

**In-app purchases:** none


### Cornerstone Cards

[App page](https://appshunter.io/ios/app/cornerstone-cards/id6526466459)

This app helps trading card enthusiasts and sellers capture high-quality images of cards and their corners. It streamlines the process of showcasing card condition, enabling sellers to generate professional photos that build buyer trust.

**Highlights:** High-quality card image capture, Focus on card corners, Streamlines condition showcasing, Professional photo generation, Builds buyer trust

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Poolsure Mobile free?

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

### Is Cornerstone Cards free?

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

### Which has better reviews, Poolsure Mobile or Cornerstone Cards?

Cornerstone Cards is rated higher. Poolsure Mobile averages 4.0 out of 5 from 4 ratings, while Cornerstone Cards averages 5.0 from 1 ratings.

### Do Poolsure Mobile or Cornerstone Cards have ads?

Neither Poolsure Mobile nor Cornerstone Cards shows ads.

### Which is updated more often, Poolsure Mobile or Cornerstone Cards?

Poolsure Mobile ships an update weekly, and Cornerstone Cards every 3 weeks. Most recently, Poolsure Mobile was updated on October 16, 2026 and Cornerstone Cards on October 10, 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.*