# インフルエンザ警戒計 vs DustMap

The clearest difference is in-app purchases: インフルエンザ警戒計 at none against DustMap's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DustMap sells 4 one-off in-app purchases. インフルエンザ警戒計 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | インフルエンザ警戒計 | DustMap |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | Every 5 months |
| Size | 7 MB | 63 MB |
| Requires iOS | 15.6 | **15** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Takahiro Izaki](https://appshunter.io/developer/511591595) | [hidehiko aihara](https://appshunter.io/developer/1178520609) |

## What reviewers say

### インフルエンザ警戒計

[App page](https://appshunter.io/ios/app/id567745994)

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

**In-app purchases:** none


### DustMap

[App page](https://appshunter.io/ios/app/dustmap/id6744262672)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee (Regular) | $0.49 | one-time |
| Coffee (Large) | $1.99 | one-time |
| システム改善応援費 | $1.99 | one-time |
| Cake Set | $5.99 | one-time |


## Frequently asked questions

### Is インフルエンザ警戒計 free?

インフルエンザ警戒計 is free to download, with no in-app purchases.

### Is DustMap free?

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

### Do インフルエンザ警戒計 or DustMap have ads?

Both インフルエンザ警戒計 and DustMap show ads.

### Which is updated more often, インフルエンザ警戒計 or DustMap?

インフルエンザ警戒計 ships an update every 5 months, and DustMap every 5 months. Most recently, インフルエンザ警戒計 was updated on October 17, 2026 and DustMap on October 8, 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.*