Fretionary
Master the guitar fretboard
Learn every note, interval, scale, and chord shape on the guitar through fast, focused drills. The fretboard trainer that finally makes theory stick.
Independent software studio
We build focused apps
people actually love to use.
Renmus Software is a small, independent studio designing and shipping mobile apps with obsessive attention to detail — from the first pixel to the last frame of animation.
- 3
- Apps shipped
- iOS · Android
- Cross-platform
- Indie
- Founder-led
Our apps
Tools that make hard things feel simple.
A family of music-learning apps that turn the intimidating parts of an instrument into something you can master a little at a time.
Fretionary Bass
Built for four (and five) strings
Everything players love about Fretionary, re-tuned for bass. Nail the fretboard, lock in intervals, and build the fluency that great bass lines are made of.
Keytionary
The keyboard, decoded
Turn the piano keyboard into second nature. Recognize notes, intervals, and chords instantly with the same bite-sized practice loop that powers Fretionary.
The studio
Small team. High standards.
Renmus Software exists to build the kind of software we wish existed — fast, honest, and a genuine pleasure to use. No bloat, no dark patterns, no shipping something we wouldn't use ourselves.
We pick problems worth solving, sweat the details most people skip, and keep iterating long after launch. Every app we make is designed to earn its place on your home screen.
- Design-first. Interfaces that feel obvious the moment you open them.
- Performance obsessed. Native-fast, offline-friendly, respectful of your battery.
- Privacy-minded. We collect what we need to run the app — and nothing we don't.
- Here for the long run. Real apps, actively maintained, not weekend experiments.
How we work
From idea to App Store, deliberately.
01
Find the friction
We start with a real, specific problem — usually one we have ourselves — and get ruthless about scope.
02
Design the loop
The core experience gets prototyped, refined, and stress-tested until it feels effortless.
03
Build it right
Clean, cross-platform code that's fast on day one and easy to keep improving.
04
Ship & sharpen
We launch, listen, and keep polishing — because the release is the start, not the finish.
Let's talk.
Questions about our apps, press, or partnership ideas? We'd love to hear from you.
hello@renmus.software