So why would you pay extra to get software that does a job you can do already? Even DxO PhotoLab 6 now has these as standard.

Anyone who uses any of these programs already mentioned (apart from Elements) will already have perspective correction tools in their host software. It can also be used as an external application with Capture One and other photo-editors that support ‘round-tripping’ with external editors. ViewPoint 4 also works as a plug-in for Photoshop, Photoshop Elements and Lightroom Classic. ViewPoint 4 can be used as a standalone program, complete with its own image browser, but it can only work with TIFFs and JPEGs, not RAW files. ViewPoint 4 can be used as a standalone application, but also integrates with DxO PhotoLab 6 to add a whole new panel and bring its geometric corrections into PhotoLab’s non-destructive workflow. It uses DxO’s lens correction profiles to automatically fix lens distortion, as required, but its main trick is to straighten horizons, fix converging verticals, correct horizontal convergence and – in this latest version – apply local geometric corrections with a new node-based ReShape warping tool.

DxO ViewPoint 4 is a program devoted specifically to lens and perspective corrections.

Dxo viewpoint review