About 格闘蛙の物語

Built by someone who trains

Fighting Frog is made by SOVL — an independent developer working across software projects, with years spent training kickboxing, boxing and Muay Thai. This one is the passion project.

Martial arts turned out to be the most engaging form of fitness we ever found: social, mentally stimulating, and genuinely good for you. It's easy to get addicted — it never feels like a chore in the way pushing weights can. That feeling is what this app tries to bottle.

The commitment behind Fighting Frog is simple: real benefit, no slop. Sessions are built on the interval structures and round intents fight gyms actually use — work that's backed by exercise science, and that we personally enjoy and believe in. If a round doesn't earn its place, it doesn't ship.

The Fighting Frog, gloves raised in victory
Who writes these

James Johnston

James Johnston is the independent developer behind Fighting Frog, writing here as SOVL. He has spent years training kickboxing, boxing and Muay Thai, and writes the training notes from that side of the ropes — as someone who trains, not as a clinician.

The articles cite their sources. Where the evidence is thin, or where a study is small enough that it should not be leaned on, that is said plainly rather than rounded up. Nothing here is medical advice.

What we stand on
Science-backed work

Round structures grounded in interval-training research and real gym practice — not content for content's sake.

Never a chore

Training should be the best part of your day. If it doesn't feel like fight practice, it's not in the app.

Eyes-free respect

Your attention belongs in the round, not on a screen. The app speaks; you fight.

Questions from the crowd

What is Fighting Frog? +

An audio-led striking coach for iPhone covering boxing, kickboxing and Muay Thai. It briefs every round with an intent, then coaches you through it with spoken cues — designed to be used eyes-free, with gloves on.

Do I need equipment? +

No. Every session works as shadow work with zero equipment. If you have a heavy bag, tell the app during setup and it will mix bag rounds in.

I've never trained before. Is it for me? +

Yes. You pick your experience level during onboarding and the coaching adjusts — beginners get more technique reminders and gentler pacing; experienced fighters get sharper, denser rounds.

Can I keep my own music playing? +

Yes. Voice cues duck in over whatever you’re playing — Apple Music, Spotify, anything — and your playlist keeps running through the whole session.

Do I need an account or internet connection? +

No account is required. Sessions are designed to work offline once the app is installed. See the privacy policy for the full picture.

When does the bell ring? +

Fighting Frog is in the final rounds of development for iOS. Follow the blog for progress and training notes in the meantime.

Something else? Head to Support — we answer everything.