213+ iOS apps curated and reviewed
Finding the right npkalc apps can be overwhelming with so many options. We've analyzed 213+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.1★ (7) | No | Yes | Jul 2026 |
| 2 |  | Free | 4.7★ (1.7M) | Yes | Yes | Jul 2026 |
| 3 |  | Free | 4.8★ (39K) | No | Yes | Jul 2026 |
| 4 |  | Free | 4.6★ (29K) | Yes | Yes | Jul 2026 |
| 5 |  | Free | 4.9★ (243K) | Yes | No | Jul 2026 |
| 6 |  | Free | 4.6★ (51K) | Yes | No | Jul 2026 |
| 7 |  | Free | 3.5★ (2.3K) | Yes | No | Jul 2026 |
| 8 |  | Free | 4.4★ (7K) | No | Yes | Jul 2026 |
This app helps calculate fertilizer needs for various applications, supporting both granular and liquid types with flexible unit inputs. It's designed for anyone managing lawns, gardens, or larger agricultural areas.
This app offers a comprehensive suite of calculation tools, including basic, scientific, and unit conversion functions. It features an AI-powered math solver that can solve problems from photos and a dedicated math notes section for jotting down equations and diagrams. Accessibility options like dynamic text size and VoiceOver support are also included.
This app is a powerful construction calculator designed for professionals working with dimensions. It offers a wide range of solutions for dimensional math, right angle calculations, area and volume, and special functions, helping to improve speed and accuracy in layouts, bids, and estimates.
Design beautiful outdoor living spaces with this powerful landscape planning tool. Visualize your dream yard using 2D or 3D augmented reality, and easily share your vision with professionals or family. Streamline the entire process from design to purchase.
Perform essential arithmetic operations with a straightforward calculator app. Its large buttons and clear display ensure ease of use, supporting both portrait and landscape orientations.
This app offers a user-friendly calculator with large buttons and extensive customization options. It features a dual-line display to see input and results simultaneously, saves your calculation history, and provides full scientific functions. Personalize layouts, themes, and even button symbols to suit your needs.
This app creates a personalized lawn maintenance plan, recommending the right products and application times based on your lawn's specific needs and local weather. It also offers direct purchasing of products, lawn size calculation, expert advice, and task tracking.
Identify plants with high accuracy, diagnose issues with AI, and receive personalized care routines. This app offers tools for watering, light measurement, and task reminders to help your plants thrive.
A powerful construction calculator designed for tradespeople. It offers a wide range of tools for estimating, layout, framing, and jobsite calculations, helping to save time and improve accuracy. Supports both imperial and metric units.
Manage all your lawn care needs conveniently from your phone. Receive personalized tips, schedule services, track visits, and make secure payments.
This app offers a powerful scientific calculator with a wide range of functions for trigonometry, statistics, and combinatorics. Users can define and evaluate their own functions, assign values to variables, and view multiple expressions simultaneously. It works offline and is completely free to use.
Identify plants and mushrooms with your phone, get personalized care plans, and receive timely watering and fertilization reminders. This app helps you understand your plants' needs, diagnose issues, and even consult with experts.
This app offers a versatile calculator with three distinct modes: Basic, Scientific, and Programmer. It provides a history view, sharing capabilities, and supports various input and output formats. The app is designed for iPhone, iPad, and iPod Touch.
Easily perform fraction calculations including addition, subtraction, multiplication, and division. Convert fractions to decimals and vice versa with a clear, user-friendly interface. Ideal for students, cooks, and DIYers needing quick and accurate fraction management.
This app offers a powerful graphing calculator experience with touch-based input for enhanced interaction. It supports natural textbook notation, advanced math functions, and various plotting capabilities. Users can also utilize its programming features and built-in tools like unit conversion and a periodic table.
Design your garden layout and discover optimal planting times. Access a comprehensive database of fruits and vegetables, including companion planting advice and custom plant options.
This app is a powerful calculator designed for construction and woodworking professionals, as well as students. It simplifies calculations involving feet, inches, and fractions, offering conversions between various measurement units and displaying equations and results simultaneously. Advanced features are available through optional in-app purchases.
This free calculator app offers a fast, ad-free experience with a visual input and calculation history. Customize your experience with various keyboard sounds and colors, and access advanced scientific functions when needed.
This app offers a clean and intuitive interface for both basic arithmetic and advanced scientific calculations. It includes a history tape to review past computations and supports various mathematical operations, making it suitable for everyday use and complex problem-solving.
This app offers a comprehensive suite of 10 powerful calculators and 10 financial worksheets, designed to handle everything from basic arithmetic to complex scientific and financial calculations. It includes features like unit conversion, currency exchange, graphing, and statistical analysis, making it a versatile tool for students and professionals.