555 Calc vs Currency Professional

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.

Currency Professional is your reliable companion for travel, finance, and international shopping. The app provides real‑time exchange rates, clear country information including flags, and an intuitive calculator that lets you convert or further process amounts instantly. The app is deliberately designed to be clean, fast, offline‑capable, and optimized for both iPhone and iPad. Features at a Glance • Live Exchange Rates Automatic updates via the FCSAPI interface Precise rate data for over 80 currencies Visible timestamp of the latest update • Intuitive Currency Calculator Full calculator functionality (plus, minus, multiply, divide) Decimal input with comma Instant conversion into all stored currencies Automatic saving of the last entered amount • Countries & Flags Each currency with country, national flag, and full name Clear list of all available currencies Quick selection with a single tap • Favorites & Personalization Automatic saving of your preferred currencies Individual sorting via drag & drop (long‑press) Optimized layout for iPhone and iPad • Offline Mode Previously loaded rates remain available App continues to work even without internet • User‑Friendly Design Clear structure, large buttons — ideal for on the go Dynamic font sizes depending on screen width Modern layout with rounded elements Perfect for Travel & vacations Online shopping abroad Financial planning International business trips Forex enthusiasts Why this app? Because it simply works: fast, clear, without unnecessary clutter — yet with everything you need for precise currency conversions.