Developing quality software takes many engineering hours and resources. SpotEQ31 is created by a small startup with no external funding. A double-sided EQ is a niche product and will probably not interest the majority of users, however it could hopefully be of great value to a few. If you'd like to support this ad-free app to become the ultimate EQ experience on Android, you might want to consider unlocking one of the feature packs below.
Here is the current feature comparison of the subscription and the one-time fee basic features:
Included in the Basic features
3 custom presets
1 custom frequencies band config
23, 27 and 33 band EQs
Bypass or close the running EQ directly from the notification
Decibel values visible and able to fine-tune
Color settings
Use the unlocked app on all your compatible devices (where you are using your Google account)
Features still available after uninstall/reinstall (but any saved presets will be lost)
Included in the Premium subscription
Unlimited custom presets
Unlimited custom frequencies band configs
23, 27 and 33 band EQs
Bypass or close the running EQ directly from the notification
Decibel values visible and able to fine-tune
Color settings
Use the premium app on all your compatible devices (where you are using your Google account)
Features still available after uninstall/reinstall (but presets need to be backed up manually)
Exclusive to subscribers:
Being able to export/import your presets
Unlimited built-in Media player
Enable the EQ on app start
Auto-start the app on device boot
Fade-in volume when starting a new track (if the EQ takes some time before kicking in on your music app this can improve your experience)
Choose presets directly from the notification
Lock the EQ (prevent accidental touches)
Reset and copying bands
Mirroring of preset settings in Separate mode
Audio Effects:
Reverb
Limiter
Extra Bass boost
Virtualizer, stereo expansion
Auto-pan
Here are the subscription features currently worked on:
Auto-switch presets when using headphones or different sound sources
Wishlist/future features
The ability to implement these features very much depend on subscriptions/support of this app. A premium subscriber's input will also be considered when prioritizing:
Multi-band dynamic compressor
Better compatibility with phone calls and communication apps
Additional pre-EQ
Visualizer averaging time setting
Android watch support
Android widget to easier choose presets
Voice control
Hearing curve assessment
Import of specific headphones frequency curves