年賀状2023 みんなの筆王 by SOURCENEXT CORPORATION is an iPhone app that lets you create and send New Year's cards with ease. Whether you want to send a formal or casual card, this app has got you covered. With over 3,000 stylish templates and stamps, you can create your own original design by combining different elements. The app also features editing tools to add photos, stamps, and text to your cards. The fit button makes it easy to adjust the size of images to fit the card.

This app also comes with a cloud-based address book that allows you to manage your contacts and print addresses on your cards. You can even import contacts from your iPhone's contact list. The app supports net printing and printing at convenience stores, making it easy to print your cards. Additionally, the app offers a printing service where you can leave everything from card purchase to delivery to the professionals. The app is free to download, but some features are available for a fee.

Overall, if you're looking for an easy and convenient way to create and send New Year's cards, then年賀状2023 みんなの筆王 is definitely worth checking out.