Citi, Fidelity and Mint are the first financial services-related developers out of the blocks with apps designed for the new Apple Watch, which goes on sale next month.
Citi's app lets users see their checking, savings, and credit card balances, get detailed information about their five most recent transactions, and receive notifications of payment due dates.
PFM outfit Mint's offering gives people the ability to view monthly spending goals and track their progress, as well as receive updates on their efforts.
The Fidelity Mobile app for Apple Watch gives customers an overview of global markets and alerts on stocks and investments in real-time right on their wrist.
Meanwhile, Apple chief Tim Cook used today's Watch event to boast about the progress of Apple Pay, which now has 2500 banks onboard and is accepted at nearly 700,000 places, including some 40,000 Coca-Cola vending machines.
The watch, available for pre-order from 10 April, will give owners another device with which to make payments. To set up cards, users open the Watch app on their iPhone and take a photo to capture the plastic's details. The first card is the default.
At the point of sale, shoppers double tap the watch's button and can then swipe through their cards before paying with a flip of the wrist near the contactless reader.