Conquer cycling trainers are classic and the perfect option for any budget. If you'd like to electronically track your speed or other progress you may have to get a little creative when making a dumb trainer into a smart trainer. 

Speed, RPM and cadence sensors and power meters (both wireless/bluetooth and wired) are available online or at bike shops. Through the ANT+ Bluetooth features, you should be able to connect sensors to any compatible phone apps. There are many online helps available for this, it depends on the experience you are looking for. An internet search of "how to turn a 'dumb' trainer into a smart trainer" or "bike speed and cadence sensors" will get you on the right track.