Technology for people who hit things.
Business Expense builds apps and music technology for drummers and the rhythm section — practice tools, time-keeping engines and hardware integrations designed by people who sit behind a kit themselves.
What we do
Everything we make starts with the same question: does it feel right at the kit? We design for musicians first and screens second.
Apps for drummers
Practice tools, metronomes and training software for iPhone, iPad and Apple Watch — built around how drummers actually rehearse, warm up and perform.
Real-time audio engines
Low-latency audio and timing engines where every millisecond is accounted for. When the click drifts, drummers notice — so ours doesn't.
Hardware & MIDI integration
Software that speaks fluently with electronic kits, triggers, pads and controllers — so your gear works together instead of merely coexisting.
Built at the drum throne, not the desk
Rhythm software has one unforgivable sin: bad timing. Our engineering culture is organised around protecting the groove.
Currently in the workshop
Three products in active development — a practice coach, a programmable metronome and a trigger toolkit for electronic kits.