Apps like Sennheiser Smart Control Plus

Here are some great alternatives to Sennheiser Smart Control Plus by Sonova Consumer Hearing GmbH :
Super Hearing from Distance
Super Hearing from Distance
★4.7
Headphone Control
Headphone Control
★4.0
Melomania Connect
Melomania Connect
★4.1
Volume Control & EQ Boost
Volume Control & EQ Boost
★4.2
oraimo sound
oraimo sound
★3.4
Bluetooth Headphones Booster
Bluetooth Headphones Booster
★4.5
Sound Amp: Volume & Bass Boost
Sound Amp: Volume & Bass Boost
★4.4
EarFun Audio
EarFun Audio
★3.4
EAR SPY: Listening Device, Mic
EAR SPY: Listening Device, Mic
★4.6
Shokz
Shokz
★4.5
Volume booster For Bluetooth
Volume booster For Bluetooth
★4.3
Sound Booster for Headphones
Sound Booster for Headphones
★4.6
Jaybird
Jaybird
★3.9
Headphone Volume Booster
Headphone Volume Booster
★3.5
Volume Booster - Equalizer Pro
Volume Booster - Equalizer Pro
★4.6
Bose
Bose
★4.3