# 気圧予報と頭痛記録 vs Pollen Shield

The clearest difference is in-app purchases: Pollen Shield at none against 気圧予報と頭痛記録's 2. Pollen Shield also leads on iOS requirement (17.0 vs 26.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 気圧予報と頭痛記録 sells 2 in-app purchases, starting at $1.99 per month. Pollen Shield asks for nothing beyond the download.

気圧予報と頭痛記録 ships an update every 9 days, Pollen Shield every 8 days. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 気圧予報と頭痛記録 | Pollen Shield |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 8 days** |
| Size | 4 MB | 2 MB |
| Requires iOS | 26.1 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Ryutaro Wakamori](https://appshunter.io/developer/1862390869) | [playpark](https://appshunter.io/developer/1679691371) |

## What reviewers say

### 気圧予報と頭痛記録

[App page](https://appshunter.io/ios/app/zukin/id6757862749)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZUKIN PRO Monthly | $1.99 | per month |
| ZUKIN PRO Yearly | $19.99 | per year |


### Pollen Shield

[App page](https://appshunter.io/ios/app/pollen-shield/id6762162698)

**In-app purchases:** none


## Frequently asked questions

### Is 気圧予報と頭痛記録 free?

気圧予報と頭痛記録 is free to download, with in-app purchases available.

### Is Pollen Shield free?

Pollen Shield is free to download, with no in-app purchases.

### Do 気圧予報と頭痛記録 or Pollen Shield have ads?

Neither 気圧予報と頭痛記録 nor Pollen Shield shows ads.

### Which is updated more often, 気圧予報と頭痛記録 or Pollen Shield?

気圧予報と頭痛記録 ships an update every 9 days, and Pollen Shield every 8 days. Most recently, 気圧予報と頭痛記録 was updated on October 25, 2026 and Pollen Shield on October 14, 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.*