250+ iOS apps curated and reviewed
Looking for free fdr calculator apps? 18 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★ (23) | No | Yes | Aug 2026 |
| 3 |  | Free | — | Yes | No | Aug 2026 |
| 4 |  | Free | 2.0★ (1) | No | No | May 2026 |
| 5 |  | Free | — | Yes | No | May 2026 |
| 6 |  | Free | 4.7★ (61K) | No | No | Aug 2026 |
| 7 |  | Free | 1.7★ (3) | No | No | Aug 2026 |
| 8 |  | Free | — | No | Yes | May 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.
Perform essential math operations like addition, subtraction, multiplication, and division without any interruptions. Save your calculations with custom titles for easy retrieval and reuse.
This utility app simplifies everyday calculations with a unique musical interface. It allows users to recall and edit previous expressions, view them clearly with a font controller, and offers standard backspace and clear functions.
This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.
This comprehensive utility app offers a wide range of calculators for everyday tasks, financial planning, unit conversions, and date calculations. It features a user-friendly interface, customizable options, and support for multiple number systems, making it a versatile tool for students and professionals alike.
This app offers a classic scientific calculator with both simple and engineering modes. It allows users to save calculations, customize the background with personal images, and preview expressions. It supports a range of Apple devices and includes dark/light modes.
A fast, clean, and easy-to-use calculator app offering both basic and advanced scientific functions. It features a minimal design, calculation history, and supports dark and light modes for a comfortable daily calculation experience.
This utility app offers a comprehensive suite of calculators for everyday financial, health, and date-related needs. It includes tools for loans, investments, taxes, health metrics, and unit conversions, along with a math solver.
Enter mathematical formulas as text and get instant results. Review past calculations with a history feature for error checking and reuse. Supports advanced functions and constants, and can email your calculation history.
This utility app offers a modern calculator with a visual history feature, eliminating the need to memorize previous calculations. It also includes a comprehensive unit converter and a tip calculator that bases tips on pre-tax amounts.
