246+ iOS apps curated and reviewed
Finding the right timer 555 calculator pro apps can be overwhelming with so many options. We've analyzed 246+ 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 |  | $0.99 | 4.7★ (3) | No | No | May 2026 |
| 2 |  | Free | 3.9★ (8) | No | Yes | Aug 2026 |
| 3 |  | Free | 4.0★ (3) | Yes | No | May 2026 |
| 4 |  | Free | 5.0★ (1) | No | Yes | May 2026 |
| 5 |  | Free | 4.5★ (126K) | Yes | Yes | Aug 2026 |
| 6 |  | $3.99 | 4.8★ (218) | No | No | Aug 2026 |
| 7 |  | Free | — | No | No | May 2026 |
| 8 |  | Free | 4.4★ (1.2K) | Yes | No | Aug 2026 |
Calculate parameters for monostable and astable circuits. Find component combinations for desired pulse width or frequency. Share circuit files via iCloud Drive or AirDrop.
Calculate monostable and astable circuits for electronics projects. Determine pulse width and frequency, find component combinations, and save/upload data. Supports multiple languages.
This utility app helps engineers and hobbyists calculate resistor values for circuits using the Timer IC 555. Simply input frequency, duty ratio, and capacitor values to get the required resistor outputs.
This comprehensive utility app consolidates numerous calculators for scientific, health, date, and unit conversions. It offers a wide array of tools, from basic arithmetic to complex calculations and timers, all within a single application. No internet connection is required for its built-in functions.
This app offers both basic and advanced scientific calculations with an intuitive interface designed for tablets and phones. It includes features like currency conversion, calculation history, and the ability to share results. An optional premium membership removes ads and provides enhanced support.
This advanced timer allows for precise time management across various activities. Set multiple special events with customizable triggers like sounds, messages, or screen flashing. It's ideal for games, workouts, cooking, meditation, and any task requiring accurate timing, even when the app is in the background.
This application provides a clean, simple, and reliable timer for various timing needs, including cooking, sports, and work. It offers seamless integration with Apple Watch and Today Widgets, allowing for synchronized control and notifications.
A free, classic calculator app with large, easy-to-press buttons and customizable skins. It supports basic arithmetic, memory functions, and can handle very large numbers without using scientific notation. Multitasking is also supported on compatible devices.
This app is a powerful and intelligent calculator with a smart UI and live results. It offers basic, advanced, and scientific functions, a history log, customizable themes, and user-definable functions. It also includes features like an on-screen timer and iPad multitasking support.
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 provides a reliable and accurate countdown timer with customizable alerts and a user-friendly interface. Personalize your timer with different colors and alarm sounds to suit any situation, from cooking to workouts.
This advanced calculator app offers a powerful math core and algebra engine for basic to complex calculations. It includes features like step-by-step solutions, handwriting recognition, and 2D graphing, making it suitable for students, engineers, and programmers.
This comprehensive utility app offers a wide range of calculators for everyday tasks, financial planning, unit conversions, and date calculations. It features a user-friendly interface, customizable options, and support for multiple number systems, making it a versatile tool for students and professionals alike.
A straightforward calculator app designed for simplicity, offering basic arithmetic operations and percentage calculations. It allows users to record and recall past results, customize colors, and enable touch sounds for a personalized experience.
This minimalistic timer app offers intuitive progress visualization and interval timing. Customize display options, enable repeat mode, and receive optional notification sounds for enhanced usability.
A fast, clean, and easy-to-use calculator app offering both basic and advanced scientific functions. It features a minimal design, calculation history, and supports dark and light modes for a comfortable daily calculation experience.
A straightforward timer app with a large display and two prominent buttons for easy operation. Enjoy a minimalist user experience designed for quick and simple timing needs.
Easily set and manage multiple countdown timers with minimal interaction. Save frequently used timers for cooking, studying, or gaming, and launch them instantly from a widget. Receive sound and vibration alerts when a timer finishes.