IDM+ is the fastest download manager available on android. It's upto 500% faster than normal download.

IDM+ features:

General:
• Add free
• Dark and Light themes
• Direct Download to SD card (except on Android 4.4)
• Pause and Resume feature with supported links
• Pause all / Start all / Remove all options to save time
• Unlimited retry support with custom delay
• Download are not stopped if app is closed
• Wifi only download support
• Smart error handling so you don't loose any data
• Download scheduler to schedule your downloads
• Import download links from a text file
• Export download links
• Import download link from clipboard
• Open/Share downloaded files
• Extended Notifications with download progress (Combined as well as individual)
• Supports vibration and notification sound on download completion
• Supports all formats: archive files, MUSIC, VIDEO, documents, programs etc
• Support multiple web browsers, including: Default Android browser, Chrome, Firefox etc
• Sort files by name, size, date and categorize by types and time

Advanced:
• Upto 5 simultaneous downloads
• Multi part downloading - upto 16 simultaneous parts per download
• Support for proxies (with or without authentication)
• Speed limiter to limit speed of downloads (Global as well as individual)
• Refresh expired links (Direct or using inbuilt browser)
• Download password protected files
• Calculate MD5 checksum

Additional:
• Built-in web browser with support for multiple tabs, history and bookmarks
• Incognito browsing mode
• Download by automatically catching links of MUSIC/VIDEO from your favorite websites