Although it is a discontinued model, …
… the Kärcher high-pressure cleaner KHD 4-2 from Aldi is hardly worse equipped than the successor model Kärcher K 4 Power Control, available from Amazon. Both offer a pressure of up to 130 bar, a maximum flow rate of 420 l/h and an 8 m long high-pressure hose. The K 4 Power Control also offers an app, but nothing can be controlled with it. It only serves as information for the setting options such as the optimal pressure for the surface to be cleaned.
Although the K4 Power Control has a sleeker design, it is also significantly more expensive at 189 euros. In addition, it is currently only available via Amazon in one to two months. You’d better get 139 euros for the first hour in the Aldi branch on March 31st. And saved another Fuffi!