# FDR Calculator vs MAPDEFIRE

The clearest difference is in-app purchases: MAPDEFIRE at none against FDR Calculator's 2. MAPDEFIRE also leads on update cadence (every 4 weeks vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. FDR Calculator sells 2 in-app purchases, starting at $1.99 per month. MAPDEFIRE asks for nothing beyond the download.

FDR Calculator ships an update every 4 months, MAPDEFIRE every 4 weeks. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | FDR Calculator | MAPDEFIRE |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 35 MB | 57 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Alan Richert](https://appshunter.io/developer/527055673) | [Map De Fire](https://appshunter.io/developer/1861444637) |

## What reviewers say

### FDR Calculator

[App page](https://appshunter.io/ios/app/fdr-calculator/id527055670)

Instantly calculate fire danger ratings with professional-grade algorithms. Offers real-time weather data integration, visual danger level displays, and detailed action recommendations for informed fire prevention and management.

**Highlights:** Instant Fire Danger Index calculations, Real-time weather data integration, Visual color-coded danger levels, Detailed action recommendations, Manual calculator for offline use, Automatic location detection

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weather Pro (Monthly) | $1.99 | per month |
| Enable Local Weather | Free | one-time |


### MAPDEFIRE

[App page](https://appshunter.io/ios/app/mapdefire/id6746377146)

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

**In-app purchases:** none


## Frequently asked questions

### Is FDR Calculator free?

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

### Is MAPDEFIRE free?

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

### Do FDR Calculator or MAPDEFIRE have ads?

Neither FDR Calculator nor MAPDEFIRE shows ads.

### Which is updated more often, FDR Calculator or MAPDEFIRE?

FDR Calculator ships an update every 4 months, and MAPDEFIRE every 4 weeks. Most recently, FDR Calculator was updated on October 8, 2026 and MAPDEFIRE on October 7, 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.*