AspeQt is an emulator of serial peripheral devices for 8-bit Atari computers, working with SIO2PC-USB FT232 and SIO2BT (eg. HC-06) based converters. It doesn't require any additional drivers to be installed (usb-serial-for-android library is included in the package). In order for it to work your device must support USB-Host/OTG.
You can download the setup package of AspeQt 1.0 free of charge and have a look at users' reviews on Droid Informer. The app runs on Android 4.1 and above. This application is totally safe for downloading. AspeQt is developed by Wiktor Grębla and its category is Tools.
Over 1K users downloaded and set up the app and the latest update was on Dec 11, 2018. The average rating for this application is 4.7 on Google Play.