Serif’s Affinity Photo (currently $69.99, often on sale for $40.99) is a professional-grade alternative. It supports PSD files, has a one-time purchase (including iPad), and offers live filters, focus stacking, and macro recording.
A one-time purchase (often ~US$99) for hobbyists. Includes guided edits and simplified interface. Not as powerful as CC, but legal and safe. Adobe Photoshop CC 2019 V20.0.1 Pre-Activated
Adobe offers a fully functional 7-day trial of the latest Photoshop version (2025 as of today), which includes all CC 2019 features and more. Serif’s Affinity Photo (currently $69