Javier Llanos

Solo developer of MUTARA

About

Indie iOS developer from Spain. I lift, and I wanted to train for hypertrophy the way the research says: enough volume to grow, close enough to failure, without overtraining or falling short. So I built MUTARA. It logs weight, reps and RIR, suggests your next weight with double progression, and checks your weekly sets per muscle against evidence-based ranges.

Links

MUTARA

Badges

Tastemaker

Gone streaking

Maker History

MUTARAThe gym log that tells you the weight for your next set
Nov 2026

🎉

Joined Product HuntNovember 2nd, 2026

Forums

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10h ago

MUTARA - The gym log that tells you the weight for your next set

MUTARA is a workout tracker for iPhone that does the progression maths for you. Log weight, reps and RIR (reps in reserve) for every set, and MUTARA suggests the weight for your next session: go up, hold or drop, using double progression. It also counts your weekly sets per muscle against research-based ranges, plans 6-week mesocycles with a deload, and keeps your history synced to iCloud. In English, Spanish, French and Portuguese.