Timer IC 555 Calculator

4.0.15

Peter Ho

4.54

2,213 reviews

100,000+
Downloads

Free

Calculation of astable and monostable circuit

Timer IC 555 Calculator Screenshot 1 of 6

Timer IC 555 Calculator Screenshot 2 of 6

Timer IC 555 Calculator Screenshot 3 of 6

Timer IC 555 Calculator Screenshot 4 of 6

Timer IC 555 Calculator Screenshot 5 of 6

Timer IC 555 Calculator Screenshot 6 of 6

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 300 times.

What is the rating of Timer IC 555 Calculator?

Timer IC 555 Calculator is rated 4.54 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 5.03 MB. The latest version available is 4.0.15. The last update was on March 22, 2026.

What are the requirements for Timer IC 555 Calculator?

Timer IC 555 Calculator requires Android 5.1+ or higher. The app has a content rating of Everyone. The app has been available on Google Play 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:
4.0.15
- Fix minor bugs

Show more Show less

More data about Timer IC 555 Calculator

Price	Free to download
Total downloads	270 thousand
Recent downloads	300
Rating	4.54 based on 2.2 thousand ratings
Ranking	Not ranked
Version	4.0.15
APK size	5.03 MB
Number of libraries	15
Designed for Android	5.1+
Suitable for	Everyone
Ads	Contains ads

App Performance Report

Get a detailed PDF report for Timer IC 555 Calculator with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more

Get PDF Report — $29

Alternative downloads for the Timer IC 555 Calculator app

Google Play Rating history and histogram

1.6K

400

130

Downloads over time

Timer IC 555 Calculator has been downloaded 270 thousand times. Over the past 30 days, it averaged 10 downloads per day.

Changelog of Timer IC 555 Calculator

Mar 22, 2026UpdateVersion 4.0.15
Jan 31, 2026UpdateVersion 4.0.05
Jan 11, 2026UpdateVersion 4.0.00
Jul 11, 2025UpdateVersion 3.5.10
May 22, 2025UpdateVersion 3.5.05
May 15, 2025UpdateVersion 3.5.00
Apr 26, 2025UpdateVersion 3.4.90
Jul 7, 2024UpdateVersion 3.4.85
Aug 19, 2023UpdateVersion 3.4.80
Aug 2, 2023UpdateVersion 3.4.75
Jun 11, 2023UpdateVersion 3.4.70
May 8, 2023UpdateVersion 3.4.55
Apr 12, 2023UpdateVersion 3.4.50
Sep 27, 2022UpdateVersion 3.4.45
Dec 3, 2021UpdateVersion 3.4.40
Oct 3, 2021UpdateVersion 3.4.30
Jul 31, 2021UpdateVersion 3.4.25
Jul 13, 2021UpdateVersion 3.4.20
Jul 6, 2021UpdateVersion 3.4.15
Jun 19, 2021UpdateVersion 3.4.10
May 15, 2021UpdateVersion 3.4.0
Apr 25, 2021UpdateVersion 3.3.5
Mar 24, 2021UpdateVersion 3.3.3
Nov 11, 2020UpdateVersion 3.3.1
Oct 24, 2020UpdateVersion 3.3.0
Oct 11, 2020UpdateVersion 3.2.0
Sep 21, 2020UpdateVersion 3.1.5
Sep 14, 2020UpdateVersion 3.1.0
Aug 14, 2020UpdateVersion 2.9.5
Mar 29, 2020UpdateVersion 2.9.1
Mar 18, 2020UpdateVersion 2.9.0
Feb 26, 2020UpdateVersion 2.8.1
Nov 28, 2019UpdateVersion 2.8.0
Oct 22, 2019UpdateVersion 2.7.6
Sep 2, 2019UpdateVersion 2.7.4
Jul 30, 2019UpdateVersion 2.7.3
May 13, 2019UpdateVersion 2.6.6
Apr 24, 2019UpdateVersion 2.6.5
Apr 6, 2019UpdateVersion 2.6.2
Oct 1, 2018UpdateVersion 2.5.2
Jun 21, 2018UpdateVersion 2.5.1
May 24, 2018UpdateVersion 2.5.0
Dec 27, 2017UpdateVersion 2.4.4
Oct 31, 2017UpdateVersion 2.4.2
Jul 11, 2017UpdateVersion 2.4.1
Jul 4, 2017UpdateVersion 2.4.0
Jun 14, 2017UpdateVersion 2.3.9
Jun 4, 2017UpdateVersion 2.3.7
May 13, 2017Installs100,000+ installs
Dec 27, 2016UpdateVersion 2.3.6

Show more Show less

Developer information for Peter Ho

Peter Ho

peterhohsy@gmail.com

N/A

Are you the developer of this app? Join us for free to see more information about your app and learn how we can help you promote and earn money with your app.

I'm the developer of this app

Comments on Timer IC 555 Calculator for Android

★★★★☆ Al Wristen · Jun 27, 2021

Had enough circuitry using 555 to be instructive and useful.

★★★★★ 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.

★★★★★ 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

★★☆☆☆ 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

Timer IC 555 Calculator is requesting 5 permissions and is using 16 libraries.

Permissions

Network communication

view network connections, full network access, Google Play billing service, Google Play license check

Extra

com.peterhohsy.timer555calculator.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Ad network libraries

None found

Social libraries

None found

Development tools

Android Jetpack core

Android Architecture Components

Android Jetpack VersionedParcelable Android Jetpack Annotations Android Library Icon

Android Jetpack Annotations Android Jetpack Widgets Android Library Icon

Android Jetpack Widgets Android Jetpack AppCompat Android Library Icon

Android Jetpack AppCompat AndroidX Activity Android Library Icon

AndroidX Activity Android Activity Saved State Android Library Icon

Android Activity Saved State AndroidX Loader Android Library Icon

AndroidX Loader Android Jetpack Media Android Library Icon

Android Jetpack Media

Android Transition Support Library

Android Support VectorDrawable

AndroidX Legacy: Support Library core utils

AndroidX Legacy: Support Library core UI AndroidX Widget ViewPager2 Android Library Icon

AndroidX Widget ViewPager2

Popular Tools Apps Top new apps Apps on sale Apps other people are watching Today's trending apps

AppBrain is a directory focused on discovering great apps and games. We give statistics, rankings and search options that Google Play and the App Store don't have. All trademarks are owned by their respective owners. AppBrain doesn't offer APKs or binaries, and always lets users install the official version from Google Play or the App Store.

More apps