250+ iOS apps curated and reviewed
Looking for free fdr calculator apps? 19 of our 250+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | Yes | Jul 2026 | |
| 2 |  | Free | 4.4★ (24) | No | Yes | Sep 2026 | |
| 3 |  | Free | 2.0★ (1) | No | No | May 2026 | |
| 4 |  | Free | — | No | No | May 2026 | |
| 5 |  | Free | — | No | Yes | Jun 2026 | |
| 6 |  | Free | — | No | No | Sep 2026 | |
| 7 |  | $2.99 | — | No | No | Aug 2026 | |
| 8 |  | Free | 4.5★ (12) | No | No | Jul 2026 |
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.
This app offers a suite of specialized calculators for RC car enthusiasts. It helps with gear ratios, suspension geometry, corner weights, oil viscosity, fuel usage, and top speed estimations. It also stores data for multiple cars and includes helpful guides.
This app provides calculations for fire behavior based on established fuel and fire models. It's a useful tool for understanding fire dynamics, developed with support from the NZ fire service commission.
