2025-09-15 00:00:00 The BWT Best Water Professional app lets you keep a watchful eye on suitable BWT water+more products – from anywhere, at any time. The app caters for your particular needs, whether it's local water quality, the amount of water required or a specific customer application – it's remarkably simple, fast, secure and comfortable. • Enter the local water hardness, application and usage and suitable filters are displayed, with the optimal size and the replacement date.