# 差圧チェッカー vs Precise Bubble Level

The clearest difference is in-app purchases: 差圧チェッカー at none against Precise Bubble Level's 3. 差圧チェッカー also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.1). Precise Bubble Level's advantage is update cadence (every 11 days vs every 3 months). On price and device support there is nothing between them.

Both are free to download. Precise Bubble Level sells 3 in-app purchases, starting at $0.99 per 7 days. 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, Precise Bubble Level every 11 days. The most recent releases landed on September 16, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | 差圧チェッカー | Precise Bubble Level |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 11 days** |
| Size | 17 MB | 49 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ryonetsu Kogyou co.,ltd.](https://appshunter.io/developer/887824730) | [Turan Hurkan Ergunsu](https://appshunter.io/developer/1842106410) |

## What reviewers say

### 差圧チェッカー

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

**In-app purchases:** none


### Precise Bubble Level

[App page](https://appshunter.io/ios/app/precise-bubble-level/id6762563537)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | per 7 days |
| Remove Ads | $2.99 | per month |
| Remove Ads | $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 Precise Bubble Level free?

Precise Bubble Level is free to download, with in-app purchases available.

### Do 差圧チェッカー or Precise Bubble Level have ads?

Precise Bubble Level shows ads; 差圧チェッカー does not.

### Which is updated more often, 差圧チェッカー or Precise Bubble Level?

差圧チェッカー ships an update every 3 months, and Precise Bubble Level every 11 days. Most recently, 差圧チェッカー was updated on September 16, 2026 and Precise Bubble Level on September 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*