1. Home
  2. 🔧 Utilities
  3. Timer 555 Calculator
Timer 555 Calculator

Timer 555 Calculator

by Siu Yuen Ho

8 ratings
4 reviews
🔧 Utilities
Free
In-App Purchases

Details

Released
March 6, 2014
Updated
May 14, 2025

Features

Developer

Siu Yuen Ho
✨Promote your app ✨
Timer 555 Calculator screenshot #1 for iPhone
Timer 555 Calculator screenshot #2 for iPhone
Timer 555 Calculator screenshot #3 for iPhone
Timer 555 Calculator screenshot #4 for iPhone
Timer 555 Calculator screenshot #5 for iPhone
iphone
ipad
🧾$0.99
In-App Purchase↘︎
⭐4
Reviews↘︎
📝3+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓8 answered
FAQ↘︎
📦w/o updates
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

Calculate monostable and astable circuits for electronics projects. Determine pulse width and frequency, find component combinations, and save/upload data. Supports multiple languages.

✓Monostable circuit pulse width calculation
✓Astable circuit frequency calculation
✓Component combination finder
✓Save component values to CSV
✓Upload CSV via AirDrop/iCloud Drive
✓Multi-language support
Show original description

What's New in Timer 555 Calculator

3.0.20

May 14, 2025

Fix minor bugs

1

Subscriptions & In-App Purchases

$0.99

Unlock Pro feature

Unlock Pro feature

User reviews

Most RecentHighest RatedLowest Rated

Пользователь.

Не смотря на простоту программы, лично мне нравиться и интерфейс и выполняемые ею функции.
П6Путин 653268986532

Good app

It was a very good app and easy to use and I have used it multiple times with no issues whatsoever.
ESEitan Schnur

Good, simple

Nice little 555 timer App. Great for most common 555 applications. It would be nice if other circuits found in books like the 555 Timer Cookbook would be included too.
Pphonebone222

Excellent Tool

This application is easy to use and very useful
Pphotomem

Developer apps

Easy Ohm's Law
Easy Ohm's Law

by Siu Yuen Ho

📚 Education

(2)

Free
In-App Purchases
RC Circuit Pro
RC Circuit Pro

by Siu Yuen Ho

🔧 Utilities

(1)

$0.99
RC Circuit
RC Circuit

by Siu Yuen Ho

🔧 Utilities

(5)

Free
In-App Purchases
Resistor Tools Pro
Resistor Tools Pro

by Siu Yuen Ho

🔧 Utilities

(1)

$0.99
Resistor Tools
Resistor Tools

by Siu Yuen Ho

🔧 Utilities

(10)

Free
In-App Purchases
Timer 555 Calculator Pro
Timer 555 Calculator Pro

by Siu Yuen Ho

🔧 Utilities

(3)

$0.99
See developer apps

FAQ

What can Timer 555 Calculator do?

Timer 555 Calculator helps you calculate the pulse width of monostable circuits and the frequency of astable circuits. It also assists in finding component combinations for desired outputs and allows saving/uploading data.

Is Timer 555 Calculator free to use?

Yes, Timer 555 Calculator is free to download and use. It does offer in-app purchases, but the core functionality is available without cost.

What devices does Timer 555 Calculator support?

Timer 555 Calculator is available for iPhone and iPad devices.

How often is Timer 555 Calculator updated?

The latest version, 3.0.20, was updated on May 14, 2025, indicating active development and regular updates.

What languages does Timer 555 Calculator support?

Timer 555 Calculator supports English, German, French, Italian, Spanish, Portuguese, Japanese, Korean, and Russian.

What is the age rating for Timer 555 Calculator?

Timer 555 Calculator has an age rating of 4+, making it suitable for a wide range of users.

Does Timer 555 Calculator have ads?

No, Timer 555 Calculator does not contain advertisements. The app is free with optional in-app purchases.

How does Timer 555 Calculator compare to other circuit calculators?

Timer 555 Calculator focuses specifically on 555 timer circuits, offering detailed calculations for monostable and astable modes, along with component combination suggestions and data export features.