Download the software and have a try.
Download and install iPhone Data Eraser on your computer first. Then connect iPhone to your computer with a cable. And your iPhone will be detected automatically.
Selecting "Express Cleanup", you can click "Start Scan". And then iPhone will be analyzed automatically. After that, a list of files will be shown in front of you.
Before select what you want to erase, you can preview the data. Then, the data will be deleted forever after you click "Erase Now".
Finally, you can see the size of data you deleted on the window. And click the "Done" or "Rescan" button.
iPhone Data Eraser can make your iPhone always clean and efficient because the it can not only delete reminders but also photos, browsing history, caches, contacts, call history, ect. By the way, I want to remind you one more time: the data, deleted through iPhone Data Eraser, is possibly restored no matter by what kind of recovery software.