# 差圧チェッカー vs ReptilesFunction

The clearest difference is in-app purchases: 差圧チェッカー at none against ReptilesFunction's 2. 差圧チェッカー also leads on ads (none vs shown) and iOS requirement (13.0 vs 18.6). ReptilesFunction's advantage is update cadence (every 2 weeks vs every 3 months). On price and device support there is nothing between them.

Both are free to download. ReptilesFunction sells 2 in-app purchases, starting at $1.99 per month. 差圧チェッカー asks for nothing beyond the download.

差圧チェッカー ships an update every 3 months, ReptilesFunction every 2 weeks. The most recent releases landed on October 3, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 差圧チェッカー | ReptilesFunction |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Size | 17 MB | 85 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Ryonetsu Kogyou co.,ltd.](https://appshunter.io/developer/887824730) | [imada katsuki](https://appshunter.io/developer/1756699653) |

## What reviewers say

### 差圧チェッカー

[App page](https://appshunter.io/ios/app/id1561700741)

**In-app purchases:** none


### ReptilesFunction

[App page](https://appshunter.io/ios/app/reptilesfunction-repfun/id6541752715)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReptilesFunction Premium Monthly | $1.99 | per month |
| ReptilesFunction Premium Annual | $17.99 | per year |


## Frequently asked questions

### Is 差圧チェッカー free?

差圧チェッカー is free to download, with no in-app purchases.

### Is ReptilesFunction free?

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

### Do 差圧チェッカー or ReptilesFunction have ads?

ReptilesFunction shows ads; 差圧チェッカー does not.

### Which is updated more often, 差圧チェッカー or ReptilesFunction?

差圧チェッカー ships an update every 3 months, and ReptilesFunction every 2 weeks. Most recently, 差圧チェッカー was updated on October 3, 2026 and ReptilesFunction on October 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.*