Stacks 2 alternatives

currencystack.io is a product built and managed by PushBots – the SaaS solution for mobile and website engagement via notifications. We are API specialists who provide platform agnostic data source for foreign currency exchange rates for financial applications.

Unit Converter is simple and easy to use app allows you to convert units from many categories. This app have many advantages: Currency - real time currency, with your local currency and many other useful currencies. Fast - just tap the number and get it in the other units. Functional - a lot of categories, each contains the main units. Intuitive

Koins is a simple and beautiful currency converter. It is designed for easier one-handed use. You can quickly access your frequently used shortcuts with a swipe from the screen edge, like switching between left handed and right handed use, switching to the dark theme in a bed, switching the sound off in a meeting, etc.,