Apps Like Rapid & Quick Calculator for iPhone and iPad
Calculate, edit, and track equations
Calculate sales tax and discounts with percentage-based operations. View equations and reuse previous results via the history tape. Adjust rounding settings and switch between multiple color themes.
by Tasuku Maeda★ 4.81,473 ratingsFinanceFreeData updated 2026-09-10
Perform mortgage calculations for residential and commercial loans. Input loan details to determine affordability. Adjust variables like interest rates and down payments. Save and export calculation results. Share reports with clients or colleagues.
Perform complex calculations using 12 built-in calculators including scientific, financial, and unit conversion tools. Input formulas with three modes: standard, string, and RPN.
Fill out tax like 1099, W2, and W-9 using available templates. , eSign, share, print, and download documents directly. Submit without uploading them to the .
Simplify calculations with a clean interface showing equations and results simultaneously. Record and edit operations. Access scientific functions. Choose from multiple themes. Subscribe for quarterly membership at ¥18.
Manage budgets, mortgages, and loans with compound interest and tip calculations. Use speech voice for accessible feedback. Keep equation history, view real-time results, and export data to email or CSV.
Perform calculations with a freeform canvas and responsive results. Link numbers for instant updates. Calculate tips and discounts. View full history with clear formatting. Adjust settings for precision and layout.
Calculate with a dual-line display showing input and result simultaneously. Use percentage and backspace functions. Choose from 18 color themes. Enter multi-line equations. Automatically format scientific expressions. Access via Split View.
Track calculations step by step to identify errors. Perform basic and advanced math operations. Use scientific functions and memory storage. Save and recall previous equations. Adjust display settings for different modes.
Manage transactions from connected business accounts. Edit categories and descriptions, upload receipts. Track mileage manually or automatically. Create and send invoices. View income, insights, and trends.
Track IRS and state tax refund status in real time. Connect securely to IRS.gov and state websites. View refund details and estimated arrival dates. Receive notifications about updates and changes.
Add text, signature, image, or logo watermarks to photos and videos. Choose from multiple fonts and colors for text. Import trademarks from photos. Apply full-screen watermarks easily.
Allows plotting of polar, cartesian, and parametric equations with unlimited expressions. Users can add sliders for function transformations, create tables for data input, and animate graphs.
Edit formulas, check calculations, reuse past entries
Enter and edit mathematical formulas with real-time validation to prevent errors. Reuse past formulas to adjust values quickly. Navigate expressions using a cursor or arrow keys. Swipe to switch between calculation modes and view results instantly.
Perform arithmetic operations with a simple interface. View current calculations and track history. Supports universal device compatibility. No advanced or engineering functions included.
Enter and edit equations in mathematical notation. Visualize 2D and 3D graphs of explicit, implicit, and inequality equations. Adjust settings for display and analysis. Save and share calculations.
Calculate taxes with a dedicated tax button and grand total function. Display equations and results simultaneously on a double line interface. Round to two decimal places and correct mistakes easily. Email or copy tape entries for record keeping.
Calculate financial metrics like income tax, sales tax, profit margin, and gross profit. Input values to determine discounts, CAGR, VAT, and cryptocurrency mining profit. Track costs, net income, and finance costs with -based calculations.