Install the Process Operator Handbook
The app runs from app.wwtpplus.com. There is nothing to download from an app store: you add it to your home screen, and it then works like any other app, fully offline.
Android (Chrome)
- Open app.wwtpplus.com in Chrome.
- Tap the menu (three dots, top right).
- Tap Install app or Add to Home screen.
iPhone and iPad (Safari)
- Open app.wwtpplus.com in Safari.
- Tap the Share button (square with an arrow).
- Tap Add to Home Screen.
Computer
Open app.wwtpplus.com in Chrome or Edge and click the install icon in the address bar, or just bookmark it.
Unlocking Pro
After buying Pro, you'll get a download with your unlock code and a one-tap unlock link.
- Easiest: open the unlock link on the device where you use the app.
- Or: in the app, tap any Pro feature (or About > See Pro or enter a code), type your code and tap Unlock.
Common questions
Do I need internet? Only the first time you open it. After that it works offline.
New phone? Install the app again and enter the same code.
Is my data stored online? No. Your plant data and readings stay on your device.
Code not working? Check it against your download, or email hello@wwtpplus.com with your order number.