iPhone Screenshots


This App calculates registors value, when designing the circuit using Timer IC 555.

How to
(1) Input Frequency value.
(2) Input Duty Ratio.
(3) Input C1 Value.
(4) Touch ‘Calculate’ button.
(5) Registors value will be displayed.

* Set Duty Ratio to 50 ~ 99.
* If you set Duty Ratio to 50, R1 value will be set to 0.

What’s New

Version 1.2

- Support Dark Mode
- Support iOS 8 or later

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

MC Hamster ,

Does its job

It is one thing and it does it really well.

App Privacy

The developer, Jibiki Works, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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