Yes, the QuickBooks Self-Employed App is no longer available for download from the App Store or Google Play Store, sussextiger.
Instead, you can upgrade to QuickBooks Sole Trader, an improved tool designed specifically for self-employed users. You can check out the Switch from QuickBooks Self-Employed to QuickBooks Sole Trader article for more information. After upgrading, you can log in via the QuickBooks mobile app, which is available for download using this link.
For an introduction to the basics of the app, you can find training videos in this link: Get started with QuickBooks Sole Trader.
Please let us know if you have any additional questions.