---
title: "555 Calc - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "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) Regis"
---

# 555 Calc — United States

![555 Calc App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/7c/6d/1d/7c6d1d2e-4934-cedf-feea-657f8c307fbf/AppIcon-0-0-1x_U007emarketing-0-5-0-85-220.png/400x400bb.png)

**Developer:** [Jibiki Works](https://apptail.io/developer/jibiki-works-qhzb)
**Category:** Utilities
**Rating:** 4.0/5 (3 ratings)
**Price:** Free
**Bundle ID:** com.jibikiworks.555calc
**Store:** Apple App Store
**Country:** United States
**Version:** 1.7 (released 2026-01-02)
**Original Release:** 2014-04-29

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id868058244)
**AppTail Page:** [https://apptail.io/app/555-calc-lNPd/united-states](https://apptail.io/app/555-calc-lNPd/united-states)

## 555 Calc Description
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.

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

## 555 Calc Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/6a/65/58/6a6558fc-c1b2-158f-97d3-b2b8decec61b/mzl.corhonds.png/640x960.png)

## 555 Calc Rating Breakdown in United States
- 5 stars: 1 (33%)
- 4 stars: 1 (33%)
- 3 stars: 1 (33%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)




## 555 Calc Discovered Keywords
- 555 calc


## 555 Calc Available In
- [United States](https://apptail.io/app/555-calc-lNPd/united-states)
- [Australia](https://apptail.io/app/555-calc-lNPd/australia)
- [Mexico](https://apptail.io/app/555-calc-lNPd/mexico)
- [Azerbaijan](https://apptail.io/app/555-calc-lNPd/azerbaijan)
- [Belgium](https://apptail.io/app/555-calc-lNPd/belgium)
- [Brazil](https://apptail.io/app/555-calc-lNPd/brazil)
- [Belarus](https://apptail.io/app/555-calc-lNPd/belarus)
- [Canada](https://apptail.io/app/555-calc-lNPd/canada)
- [Switzerland](https://apptail.io/app/555-calc-lNPd/switzerland)
- [Chile](https://apptail.io/app/555-calc-lNPd/chile)
- [China](https://apptail.io/app/555-calc-lNPd/china)
- [Colombia](https://apptail.io/app/555-calc-lNPd/colombia)
- [Czechia](https://apptail.io/app/555-calc-lNPd/czechia)
- [Germany](https://apptail.io/app/555-calc-lNPd/germany)
- [Denmark](https://apptail.io/app/555-calc-lNPd/denmark)
- [Dominican Republic](https://apptail.io/app/555-calc-lNPd/dominican-republic)
- [Algeria](https://apptail.io/app/555-calc-lNPd/algeria)
- [Ecuador](https://apptail.io/app/555-calc-lNPd/ecuador)
- [Egypt](https://apptail.io/app/555-calc-lNPd/egypt)
- [Spain](https://apptail.io/app/555-calc-lNPd/spain)
- [Finland](https://apptail.io/app/555-calc-lNPd/finland)
- [France](https://apptail.io/app/555-calc-lNPd/france)
- [United Kingdom](https://apptail.io/app/555-calc-lNPd/united-kingdom)
- [Greece](https://apptail.io/app/555-calc-lNPd/greece)
- [Hong Kong SAR China](https://apptail.io/app/555-calc-lNPd/hong-kong)
- [Hungary](https://apptail.io/app/555-calc-lNPd/hungary)
- [Indonesia](https://apptail.io/app/555-calc-lNPd/indonesia)
- [Ireland](https://apptail.io/app/555-calc-lNPd/ireland)
- [Israel](https://apptail.io/app/555-calc-lNPd/israel)
- [India](https://apptail.io/app/555-calc-lNPd/india)
- [Italy](https://apptail.io/app/555-calc-lNPd/italy)
- [Japan](https://apptail.io/app/555-calc-lNPd/japan)
- [South Korea](https://apptail.io/app/555-calc-lNPd/south-korea)
- [Kuwait](https://apptail.io/app/555-calc-lNPd/kuwait)
- [Kazakhstan](https://apptail.io/app/555-calc-lNPd/kazakhstan)
- [Lebanon](https://apptail.io/app/555-calc-lNPd/lebanon)
- [South Africa](https://apptail.io/app/555-calc-lNPd/south-africa)
- [Argentina](https://apptail.io/app/555-calc-lNPd/argentina)
- [Austria](https://apptail.io/app/555-calc-lNPd/austria)
- [Türkiye](https://apptail.io/app/555-calc-lNPd/turkey)
- [Taiwan](https://apptail.io/app/555-calc-lNPd/taiwan)
- [Ukraine](https://apptail.io/app/555-calc-lNPd/ukraine)
- [Vietnam](https://apptail.io/app/555-calc-lNPd/vietnam)
- [United Arab Emirates](https://apptail.io/app/555-calc-lNPd/united-arab-emirates)
- [Malaysia](https://apptail.io/app/555-calc-lNPd/malaysia)
- [Nigeria](https://apptail.io/app/555-calc-lNPd/nigeria)
- [Netherlands](https://apptail.io/app/555-calc-lNPd/netherlands)
- [Norway](https://apptail.io/app/555-calc-lNPd/norway)
- [New Zealand](https://apptail.io/app/555-calc-lNPd/new-zealand)
- [Peru](https://apptail.io/app/555-calc-lNPd/peru)
- [Philippines](https://apptail.io/app/555-calc-lNPd/philippines)
- [Pakistan](https://apptail.io/app/555-calc-lNPd/pakistan)
- [Poland](https://apptail.io/app/555-calc-lNPd/poland)
- [Portugal](https://apptail.io/app/555-calc-lNPd/portugal)
- [Romania](https://apptail.io/app/555-calc-lNPd/romania)
- [Russia](https://apptail.io/app/555-calc-lNPd/russia)
- [Saudi Arabia](https://apptail.io/app/555-calc-lNPd/saudi-arabia)
- [Singapore](https://apptail.io/app/555-calc-lNPd/singapore)
- [Thailand](https://apptail.io/app/555-calc-lNPd/thailand)
- [North Macedonia](https://apptail.io/app/555-calc-lNPd/north-macedonia)
- [Nepal](https://apptail.io/app/555-calc-lNPd/nepal)
- [Sweden](https://apptail.io/app/555-calc-lNPd/sweden)
- [Uzbekistan](https://apptail.io/app/555-calc-lNPd/uzbekistan)
- [Estonia](https://apptail.io/app/555-calc-lNPd/estonia)

---

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