Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

Timer 555 Calculator Pro Screenshots

iPad

iPhone

About Timer 555 Calculator Pro

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
* Share file to iCloud Drive (For iOS8 or later)
* Share file via AirDrop

Additional Features in the Professional Edition
* Unlimited number of combinations
* Allow to change tolerance
* No ads

What's New in the Latest Version 3.0.15

Last updated on Mar 25, 2024

Old Versions

Fix minor bugs

Version History

3.0.15

Mar 25, 2024

Fix minor bugs

3.0.10

Jun 15, 2021

* Add Hindi
* Fix minor bugs

3.0.0

May 16, 2021

Fix minor bugs

2.9.5

Apr 29, 2021

Fix minor bugs

2.9.2

Feb 17, 2020

- Support German, Japanese, Chinese

2.6.0

Dec 28, 2019

- Support dark mode

2.5.0

Oct 8, 2018

555 projects are added

2.4.9

Sep 26, 2017

Fix minor bug

2.4.8

Sep 7, 2017

Fix bug in Airdrop sharing function

2.4.7

Jun 12, 2017

Fix minor bug

2.4.6

Jun 6, 2017

* Fix minor bug

2.4.5

Oct 7, 2016

Remove obsolete Dropbox API, use iCloud document picker instead

2.4.4

Sep 16, 2016

Fix minor bugs

2.4.3

Jun 14, 2016

Fix the link of NXP ICM7555

2.4.2

Feb 10, 2016

Fix minor bugs

2.4.1

Jan 19, 2016

Fix Dropbox bug in iOS 9

2.4.0

Oct 2, 2015

Fix AirDrop bug in iOS9

2.3.0

Jan 23, 2015

Fix minor bugs

2.2.0

Dec 11, 2014

Share file to iCloud Drive (For iOS8 or later)
Share file via AirDrop

2.0.0

Oct 21, 2014

New user interface
Fix compatibility issue in iOS8

1.0.4

Mar 15, 2014

- Save combination of components in CSV file
- Upload CSV file to Dropbox
- iPad UI is added

1.0.2

Mar 6, 2014

Feedback Report

Timer 555 Calculator Pro FAQ

What country or region is Timer 555 Calculator Pro available in?

Timer 555 Calculator Pro is available in regions other than the following restricted countries:

China

What language does Timer 555 Calculator Pro support?

Timer 555 Calculator Pro supports English, French, German, Hindi, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese