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Timer 555 Calculator

App Store★ 3.9FreeFirst seen 17 Oct 2026

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App info

Category: Utilities
Age rating: 4+
Price: Free
Version: 3.0.20
Released: Mar 6, 2014
Last updated: 14 May 2025
Size: 3.1 MB
Requires: iOS 13.2 or later
Languages: 12

3.98 ratings

★★★★★

Average rating on the App Store. Apple doesn't publish how many ratings each star has.

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What's newin version 3.0.20

Fix minor bugs

About this app

Read full description

This app is used to calculate monostable and astable circuit. Features * Calculate pulse width of monostable circuit * Calculate frequency of astable circuit * Find out combination of components making a desire pulse width in monostable circuit * Find out combination of components making a desire frequency in astable circuit * Saving component values in CSV file * Upload generated CSV files via AirDrop or iCloud Drive * Support English, German, French, Italian, Spanish, Portuguese, Japanese, Korean, Russian