# NPC Pro vs The Mobile Pool Store

The clearest difference is update cadence: The Mobile Pool Store at every 4 days against NPC Pro's every 24 months. The Mobile Pool Store also leads on iOS requirement (13.0 vs 15.0). On price, ads, 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.

NPC Pro ships an update every 24 months, The Mobile Pool Store every 4 days. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | NPC Pro | The Mobile Pool Store |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 84 MB | 64 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [National Plasters Council, Inc](https://appshunter.io/developer/1273077383) | [Ryan Boyd](https://appshunter.io/developer/6775536697) |

## What reviewers say

### NPC Pro

[App page](https://appshunter.io/ios/app/npc-pro/id1273077384)

This app helps pool professionals manage water chemistry and follow startup procedures for plaster finishes. It offers an LSI calculator, water chemistry recommendations, and step-by-step guides for maintaining pool surfaces. Connect with experts and access resources to ensure balanced water and durable finishes.

**Highlights:** LSI Calculator for water balance, Water chemistry recommendations, Plaster startup procedures guide, Easy data input for instant results, Professional-grade accuracy, Ask the Expert feature, Access to podcasts and technical resources

**Features:** macOS Compatibility

**In-app purchases:** none


### The Mobile Pool Store

[App page](https://appshunter.io/ios/app/the-mobile-pool-store/id6775536695)

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

**In-app purchases:** none


## Frequently asked questions

### Is NPC Pro free?

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

### Is The Mobile Pool Store free?

The Mobile Pool Store is free to download, with no in-app purchases.

### Do NPC Pro or The Mobile Pool Store have ads?

Neither NPC Pro nor The Mobile Pool Store shows ads.

### Which is updated more often, NPC Pro or The Mobile Pool Store?

NPC Pro ships an update every 24 months, and The Mobile Pool Store every 4 days. Most recently, NPC Pro was updated on October 10, 2026 and The Mobile Pool Store on October 12, 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.*