# STOCK WATCH 在庫監視アプリ vs PH System

The clearest difference is update cadence: STOCK WATCH 在庫監視アプリ at every 5 weeks against PH System's every 15 months. STOCK WATCH 在庫監視アプリ also leads on iOS requirement (9.0 vs 13). 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.

STOCK WATCH 在庫監視アプリ ships an update every 5 weeks, PH System every 15 months. The most recent releases landed on August 22, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | STOCK WATCH 在庫監視アプリ | PH System |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 15 months |
| Size | 77 MB | 25 MB |
| Requires iOS | **9.0** | 13 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [131KR CORPORATION](https://appshunter.io/developer/1209948426) | [barnet Inc.](https://appshunter.io/developer/1203142034) |

## What reviewers say

### STOCK WATCH 在庫監視アプリ

[App page](https://appshunter.io/ios/app/stock-watch/id1256889815)

**Features:** Vision Pro support

**In-app purchases:** none


### PH System

[App page](https://appshunter.io/ios/app/ph-system/id1438705034)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is STOCK WATCH 在庫監視アプリ free?

STOCK WATCH 在庫監視アプリ is free to download, with no in-app purchases.

### Is PH System free?

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

### Do STOCK WATCH 在庫監視アプリ or PH System have ads?

Neither STOCK WATCH 在庫監視アプリ nor PH System shows ads.

### Which is updated more often, STOCK WATCH 在庫監視アプリ or PH System?

STOCK WATCH 在庫監視アプリ ships an update every 5 weeks, and PH System every 15 months. Most recently, STOCK WATCH 在庫監視アプリ was updated on August 22, 2026 and PH System on September 25, 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.*