207+ iOS apps curated and reviewed
The best timer 555 calculator apps on iPhone average 4.6★ across 207+ titles — we've ranked them by what real users actually keep on their phones. Updated May 2026.
This application calculates and designs monostable and astable circuits, allowing users to determine pulse widths and frequencies, and find suitable component combinations. It also enables saving and sharing of component values in CSV files, and supports multiple languages.
This app calculates and designs monostable and astable circuits, allowing users to determine pulse widths and frequencies, and find suitable component combinations. Download now to start creating and sharing your circuit designs with ease.
This application helps you design circuits using Timer IC 555 by calculating resistor values based on input frequency, duty ratio, and capacitor value. Simply enter the required values and tap 'Calculate' to get the resistor values displayed, making it easy to plan your circuit design.
Try Digits Tape Calculator, the calculator designed for humans. With a unique correctable tape feature, spreadsheet-like editing, and calculator simplicity, it's perfect for tracking expenses and budgets. Get organized on-the-go with Digits 3 for iOS.
This application helps users calculate hours and minutes quickly and competently. Whether for work, study, or personal use, it simplifies time calculations. Try it now for a hassle-free approach to managing your time effectively!
A versatile calculator app with Basic, Scientific, and Programmer modes for iPhone, iPad, and iPod Touch. Easily view history and share results via email or copy. Get precise calculations on-the-go!
An app designed to streamline work hours calculations, helping users track their time with precision. Simplify your scheduling and stay organized effortlessly with Time Calculator⁺.
A versatile calculator app for iPhone and iPad offering over 40 calculators and unit converters for finance, health, and more. Simplify your calculations with just one app today!
An interval timer designed for fitness enthusiasts, offering customizable sets, high/low intensity intervals, and rest times for various workout routines. Features include the ability to run in the background, play music during workouts, share progress on social media, save settings as templates, and integrate with Apple Health for heart rate tracking on the Apple Watch. Start optimizing your workouts today!
A handy math assistant for solving basic and scientific calculations intuitively and quickly. Become a math master with this free app!
A workout timer app that allows you to set custom intervals for exercise, rest, and rounds seamlessly. Features include audio guides, progress tracking, and the ability to listen to music from other apps while using the timer. Improve your fitness routine with this easy-to-use interval timer app!
A free and simple interval timer app for all kinds of activities like Tabata, HIIT, Crossfit, and more. Features include customizable intervals, easy presets, audible interval names, color coding, and support for different workout routines. Start optimizing your workouts with just one tap.
Experience a high precision calculator app that offers a user-friendly interface, supports multiple functionalities like undo, switching workspaces, Bluetooth keyboard compatibility, and more. Print and share your calculations with ease and precision for free!
Stay on track and focused with this unique timer app. With loud and readable alerts, it ensures you never miss a deadline again. Download now to boost your productivity!
Access a user-friendly calculator app with a built-in archive of your calculations for easy reference. Enjoy an ad-free experience with customizable features for seamless calculations. Try it now for straightforward and efficient math operations.
Set and manage multiple timers and stopwatches simultaneously with the ability to run multi-step countdowns. Stay organized and efficient with this comprehensive timer application. Try it now for improved time management!
Calculate dates, intervals, and countdowns with our app! Add or subtract workdays, customize countdowns, and set up your workweek. Download now for efficient date management.
PCalc Lite is the ideal calculator app for scientists, engineers, students, and programmers offering RPN mode, multi-line display, unit conversions, constants, and more. Try it for free on your iPad and upgrade for additional features or themes. Also available on Apple Watch for on-the-go calculations.
Discover the best hand calculator for all your basic math needs - addition, subtraction, multiplication, division, and more, with customizable features like recording and recalling past calculations and touch sound. Perfect for school children and anyone seeking a simple and efficient calculator solution!