SwiftUI
The app stays on your iPhone even after unplugging it from mac or iMac but it only stays for 7 days. After 7 days you need to re-deploy, it means that you need to this procedure again or you can simply just buy the 99.9 dollar subscription from Apple.
Iphone App Development Kit For Mac Download

This innovative new way to build user interfaces across all Apple platforms lets you create better apps with less code.
Build, Release, and Market — The Complete Package. When you are planning on releasing an app which you have made or wishing to make your site an iPhone app, you need to have an important app release milestone, because this milestone defines how your iPhone app development is going to stay in the market, and how many people are going to be interested in your app. Apple on Tuesday began the approval process for its Developer Transition Kit, a Mac mini with specialized software that stands ready to usher in a new era of Macs powered by the tech giant's own. Reap the benefits of open source. From the team behind Apache Cordova, the Adobe PhoneGap framework is an open source distribution of Cordova — providing the advantage of technology created by a diverse team of pros along with a robust developer community — plus access to the PhoneGap toolset, so you can get to mobile faster.
Test Your Apps with TestFlight
TestFlight makes it easy to invite users to test your apps and collect valuable feedback before releasing your apps on the App Store. You can invite up to 10,000 testers using just their email address or by sharing a public link.
Apple Platforms
Develop apps that integrate seamlessly with the latest advancements in Apple platforms.
Iphone App Development Company
Resources

Find tools and resources for creating apps and accessories for Mac, iPhone, iPad, Apple Watch, and Apple TV.