Download Navi is a free and open source downloads manager that's compatible with Android TV and Chrome OS, plus many other browsers. The app can also be customized to your needs thanks to a generous amount of options.
For example, you can choose the maximum number of simultaneous downloads for your smartphone from the settings menu. By default, you can download a maximum of three files at a time, but you can increase this number to 10, 50, 100, or whatever you want. You can also increase or decrease the number of retries, which by default is set at five.
Other interesting options include the ability to pause all downloads if your smartphone's battery is at 15% or less. Or, if you prefer, you can download files only when your smartphone is charging. Either way, you can download files at all times in the background.
Download Navi is an amazing downloads manager, thanks to which you can have total control over what you download on your Android. The app also automatically calculates hash functions (MD5 and SHA-256) for all files when they start downloading.
Requirements (Latest version)
- Android 4.4 or higher required
2 reviews 
Comments
Excellent application, but since it is open-source, we have to consider that it is also under development. So, we will always look forward to more updates and hope it keeps improving.