S Delete

Supports Android 7.1, 7.0, 6.0 

SDelete (Secure Delete) is an advanced file shredder that securely deletes your personal data and makes it completely unrecoverable by any advanced recovery tools.

 Why SDelete?
 Highly advanced secure deletion tool which leaves no trace of your personal data
Supports secure file deletion in internal storage and also in SD card
 Securely shreds your photos, videos, audio, documents and files of any type
Supports fast and secure wiping of free space to make your deleted files unrecoverable
Supports automatic delete of thumbnails for images and videos
Supports international deletion standards (US DoD 5220.22-M & NIST 800-88)
Supports latest Android OS including Nougat (7.1 & 6.0) and Marshmallow (6.0)

 Features
 Simple and smooth file browser with faster navigation and easy deletion
Delete multiple files and folders at same time
 Thumbnail preview for images and videos in file browser
Delete files in SDL by selecting other file managers and Gallery apps
Securely delete hidden files also
Supports custom shredding patterns
Scrap the file contents only leaving the file undeleted
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SDelete Pro Features
No Ads in app
Password lock for app
Priority Support
Lot more unique features exclusively for pro version .Download
Link for SDelete Pro
https://play.google.com/store/apps/details?id=com.vb2labs.android.sdelete.pro