Controller upgrade recommendations

I currently have the ElectraStim Flick Electro Stimulator- EM60-E and have been using it for about a year. I’m able to turn it up pretty high and I’m left looking for more. Can anyone recommend a stronger controller? Bonus points if it’s able to connect to an app for patterns, etc.

https://us.electrastim.com/collections/electro-sex-stimulators/products/electrastim-flick-em60-e-electro-stimulation-pack