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Last updated on: 2026-09-29
Android Apps > Tools > Timer IC 555 Calculator
Timer IC 555 Calculator icon

Timer IC 555 Calculator

4.0.30
Peter Ho
4.57
2,218 reviews
100,000+
Downloads
Free

Calculation of astable and monostable circuit

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4.57 · 2,218 reviews · 100,000+ downloads
Download from Google Play

About Timer IC 555 Calculator

Timer IC 555 Calculator is a tools app developed by Peter Ho.

How many times has Timer IC 555 Calculator been downloaded?

Timer IC 555 Calculator has been downloaded 270 thousand times. In the last 30 days, the app was downloaded 190 times.

What is the rating of Timer IC 555 Calculator?

Timer IC 555 Calculator is rated 4.57 out of 5 stars, based on 2.2 thousand ratings.

Is Timer IC 555 Calculator free?

Timer IC 555 Calculator is free to download. The APK download size is 8.45 MB. The latest version available is 4.0.30. The last update was on September 2, 2026.

What are the requirements for Timer IC 555 Calculator?

Timer IC 555 Calculator requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since December 2013.

Description
IC 555 is a basic timer IC for hobbyist or electronic engineers. This app is used to calculate monostable and astable circuit

Features:
1. Calculate monostable circuit
2. Calculate frequency of astable circuit
3. Calculate component values of monostable and astable circuit. Save component values in CSV file (Excel file)

Features in PRO version only:
1. Selectable preferred value of resistors and capacitors
2. Share CSV file to other apps
3. No limitation
4. No Ad

Note :
For those who need support please email to the designated email.
Do NOT use either the feedback area to write questions, it is not appropriate and that is not guaranteed that can read them.

Recent changes:
4.0.30
- Fix minor bugs
Show more Show less

More data about Timer IC 555 Calculator

Price Free to download
Total downloads 270 thousand
Recent downloads 190
Rating 4.57 based on 2.2 thousand ratings
Ranking Not ranked
Version 4.0.30
APK size 8.45 MB
Number of libraries 19
Designed for Android 6.0+
Suitable for Everyone
Ads Contains ads

App Performance Report

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Google Play Rating history and histogram

Rating history
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1.6K
410
120
58
23

Downloads over time

Downloads over time
Subscribe to see download velocity and history

Timer IC 555 Calculator has been downloaded 270 thousand times. Over the past 30 days, it has been downloaded 190 times.

Changelog of Timer IC 555 Calculator

Show changelog

Developer information for Peter Ho

Peter Ho

peterhohsy@gmail.com

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Comments on Timer IC 555 Calculator for Android

★★★★★ Roger Hale · Nov 13, 2019
I have not had any problems with this app. I only occasionally use it, but would not be happy about erasing it from my phone. I used the app today to make a turn signal flasher for a scooter. I like the app has circuited applications. If you're bored and just want something to do and have some 555 chips there is weeks and possibly months of fun u can get from this app. Thanks
★★★★★ Stephen Paul · Jun 1, 2022
This is one of those apps that you read on the loo, it's very inspiring.
★★★★★ Raid Hhi · Sep 26, 2019
This is an excellent handy little tool for adjusting 555 timer chips. If u build any circuits using them, you absolutely cannot go wrong by installing this.
★★★★☆ Al Wristen · Jun 27, 2021
Had enough circuitry using 555 to be instructive and useful.
★★☆☆☆ Rudo Strydom · Jan 7, 2021
There are a few mistakes. On astable t high = 0.69 (Ra+Rb) C, not 0.69 (Ra) C. T low is correct. T low = 0.69 (Rb) C Also on frequency f = 1.44 / (Ra+2Rb) C or 1 / 0.69 (Ra+2Rb) C, Not 1.44 / (Ra+Rb) C. In t high Rb is missing in the equation. In frequency, Rb is times 2.
★★☆☆☆ Kassim Abba Dandago · May 30, 2020
No detailed calculation. Constricted functions. Not fully calculable. You could have provided columns in which R1, R2 C, & % could be substituted to find a value or values. You deserve more star for your concern. I will be watching to add more stars, you have tried. Good luck.

Google Play Rankings for Timer IC 555 Calculator

This app is not ranked

Technologies used by Timer IC 555 Calculator

5 permissions · 19 libraries
Subscribe to see full permission and library details

Frequently asked questions about Timer IC 555 Calculator

Is Timer IC 555 Calculator free?

Yes. Timer IC 555 Calculator is free to download from Google Play.

Is Timer IC 555 Calculator still available?

Yes. Timer IC 555 Calculator is on Google Play, and the last update we saw was on September 2, 2026.

Does Timer IC 555 Calculator contain ads?

Yes. Google Play lists Timer IC 555 Calculator as containing ads.

What Android version does Timer IC 555 Calculator require?

Timer IC 555 Calculator runs on Android 6.0 and higher.

How large is the Timer IC 555 Calculator APK?

The Timer IC 555 Calculator APK is 8.45 MB.

Is Timer IC 555 Calculator suitable for children?

Google Play rates the content of Timer IC 555 Calculator as suitable for everyone.

How many times has Timer IC 555 Calculator been downloaded?

Google Play lists 100,000+ downloads for Timer IC 555 Calculator.

How do people rate Timer IC 555 Calculator?

Timer IC 555 Calculator scores 4.57 out of 5 stars, from 2,218 ratings on Google Play.

Who made Timer IC 555 Calculator?

Timer IC 555 Calculator was developed by Peter Ho. It is listed in the tools category on Google Play.

What are the best alternatives to Timer IC 555 Calculator?

People looking at Timer IC 555 Calculator also look at these tools apps: 555 Calculator : monostable , , Droid Circuit Calc, ElectroCalc PRO, Electronics Tools & Calculator, Electronics Calculator.

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