211+ iOS apps curated and reviewed
Looking for free ppi calc apps? 13 of our 211+ 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 was $0.99 | 4.7★ (37) | No | No | Jul 2026 |
| 2 |  | Free | 2.7★ (3) | No | No | Jul 2026 |
| 3 |  | Free | 4.3★ (3) | No | No | Jul 2026 |
| 4 |  | Free | 4.3★ (12) | No | No | May 2026 |
| 5 |  | Free | 4.4★ (7) | No | No | May 2026 |
| 6 |  | Free | 5.0★ (1) | No | Yes | Jul 2026 |
| 7 |  | $24.99 | 4.8★ (104) | No | No | Jul 2026 |
| 8 |  | $8.99 | 4.9★ (3.5K) | No | No | Jul 2026 |
Calculate your display's pixel density (PPI) using its dimensions and pixel count. Learn about PPI and DPI definitions, and how to categorize screen resolution.
Easily calculate the Pixels Per Inch (PPI) for any screen, from phones to monitors. Input screen dimensions and diagonal size to get an instant PPI result and determine if it qualifies as a Retina Display. You can also search for device information online and save your calculations.
Calculate display settings like DPI and PPI using only screen resolution and diagonal measurements. This straightforward utility tool provides essential display information.
Calculate pixels per inch (PPI) for any screen, along with aspect ratio and screen measurements. View data in inches or centimeters. Includes presets for standard resolutions and common devices.
Calculate display parameters for monitors, phones, and notebooks. This tool helps determine base settings for various devices.
This app offers precise unit conversions for designers and developers, specializing in pixels, inches, and centimeters. It includes tools for screen calculations, typography, and a wide range of supported units for digital and print work.
This advanced RPN scientific calculator offers workstation-class Computer Algebra System (CAS) capabilities, going beyond traditional replicas. It provides access to an extensive library of modules and programs, enhanced with iOS features, customizable skins, and iCloud support for seamless data management.
This advanced calculator offers over 100 functions for business, finance, math, and statistics. It simplifies complex calculations like loans, cash flows, and depreciation with an intuitive interface and specialized worksheets. Includes interactive graphs and an audit tape for tracking all computations.
This app offers a multi-page calculator with automatic saving and advanced functions like percentage and VAT calculation. It uniquely presents calculations in an interactive, handwritten style that can be customized with your own script.
A customizable and powerful calculator for everyday tasks. Features include calculation history, dynamic editing, multiple spaces, and useful overlays like a tip calculator and unit converter. It offers iCloud sync and home screen widgets without ads or trackers.
This app provides a large-key calculator with a virtual paper tape for reviewing calculations. It allows users to email tapes, add comments, and reuse numbers from previous entries. Customize keyboard layouts and display formats for an optimized office experience.
Access a vast computational knowledge engine to get instant expert answers and perform complex calculations across thousands of domains. Explore data, solve problems, and gain insights on topics ranging from finance and nutrition to trivia and weather.
A powerful calculator designed for professionals and students, offering advanced features like RPN mode, multi-line display, and extensive unit conversions. It supports various number systems and includes an Apple Watch app for on-the-go calculations.
This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.
This advanced math application offers comprehensive tools for graphing, calculus, algebra, and statistics. It functions as a powerful graphing calculator, assists with homework, and handles complex calculations for academic and professional use. Features include 2D/3D plotting, symbolic computation, and equation solving.
This app offers instant calculations as you type, eliminating the need for an equals button. Its notepad-style interface allows for multiple calculations at once, with smart result reuse for efficiency. It's a free, user-friendly tool for everyday math, schoolwork, and professional tasks.
This app provides a comprehensive graphing and scientific calculator experience on your mobile device. It allows you to graph multiple functions, solve equations, perform statistical analysis, and work with matrices, all with a familiar interface. Ideal for students and anyone needing advanced calculation capabilities on the go.
This calculator app automatically saves your calculations as memos, preventing errors and eliminating the need for manual note-taking. Easily share your calculations and notes with others, and access them across devices.
This advanced math application assists with a wide range of mathematical problems, from basic arithmetic to calculus, algebra, and statistics. It functions as a graphing calculator replacement, aids in homework, and supports complex calculations for academic and professional use.
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.