249+ iOS apps curated and reviewed
Book Thickness Calculator is the household name in book thickness calculator, but it's far from the only option. We track 249+ alternatives and competitors on iOS β many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | $0.99 | β | No | No | May 2026 |
| 2 |  | Free | 3.0β (8.9K) | No | No | Aug 2026 |
| 3 |  | Free | 4.8β (33) | No | Yes | Aug 2026 |
| 4 |  | Free | 4.8β (747K) | No | No | Aug 2026 |
| 5 |  | Free | 4.8β (253K) | No | No | Aug 2026 |
| 6 |  | Free | 4.7β (3.5K) | No | Yes | Aug 2026 |
| 7 |  | Free | β | No | No | Aug 2026 |
| 8 |  | Free | 4.6β (194) | Yes | No | Aug 2026 |
This app offers both basic and scientific calculators for quick solutions to mathematical expressions. It also features a "Math Notes" function that allows users to type or write out equations and see them solved inline, with support for variables and graphing.
This app assists in book production by calculating the exact number of paper reams needed for interior pages and covers. It also offers features to scan ISBNs for paper type information, calculate spine width, and generate price quotations.
This app connects you with a vast community of readers to discover new books. Get personalized recommendations, track your reading progress, and see what your friends are enjoying. Scan book barcodes in stores to add them to your wish list and read reviews before you buy.
Manage your library account and discover new content. Borrow physical items, access eBooks and audiobooks, and receive helpful reminders. Personalize your reading experience and stay organized with this intuitive library companion.
A free, redesigned calculator app offering a simpler, more intuitive experience across Apple devices. Features include customizable themes, advanced scientific functions, and unit conversion, all optimized for various screen sizes and interactions.
This app offers a straightforward and efficient calculation experience with a history log to review past computations. It supports multitasking and offers a dark mode for comfortable use.
This app offers a versatile calculator with both basic and scientific functions. It includes advanced features like currency and unit conversions, customizable themes, and history tracking. Optimized for both portrait and landscape modes, it's designed for users needing precise calculations and conversions.
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 offers a comprehensive scientific calculator with multiple modes, including algebraic, scientific, conversions, and logic calculations. It features a user-friendly design with large buttons and remembers your progress if interrupted.
Browse and manage your Calibre ebook library on iOS devices. Connect to cloud storage or local files for fast searching, sorting, and filtering. Optimized for large collections and works offline once downloaded.
This app redefines the calculator experience for touch-screen devices with a modern, intuitive design. It offers features like a tape log for storing calculations, formula evaluation, and iPad multitasking support for enhanced productivity.
This calculator app offers a user-friendly interface with large buttons and a spacious display, mimicking traditional handheld calculators. It allows for extensive customization of themes and includes a history saving feature for easy access to past calculations. Enjoy a personalized and efficient calculation experience.
Calculate spine width for books based on paper type, thickness, and page count. Essential for designers and publishers to accurately determine book dimensions.
A simple, neat, and brilliant calculator that displays entire calculations and answers at once. Personalize your experience by choosing your favorite color theme. Works on iPhone and iPod.
This app offers a comprehensive suite of 15 calculators for everyday and scientific needs. Easily perform basic arithmetic, complex scientific functions, and specialized calculations like sales tax, age, and loan payments. It also includes a robust unit converter for various measurements.