Launching soon · Join the early access list

Progress for real.
Science backs you up.

Track your weekly volume per muscle group and train with data, not guesswork. The fitness app for serious lifters — landing on iOS soon.

Built solo · One indie engineer
Free trial · No card
iOS 16+
// Data, not guesswork

You train hard.
But are you progressing?

What did you lift last time?
You show up and can't remember. So you guess, repeat the same weight, and wonder why nothing changes.
GymSets remembers every set. Open the app and pick up right where you left off.
Are you doing enough sets per muscle?
Weekly volume per muscle group is the single best predictor of growth. But if you're not counting, you don't know.
Your home screen shows sets done vs. target for each muscle, in real time.
How many weeks without missing?
Without a visible record, consistency is invisible. It's easy to skip a day when nobody's keeping track — not even you.
Streaks, visual history, and shareable sessions. When you see what you've built, you don't want to stop.
// Your training, organized

Session history.
Weekly split. All clear.

Review every session in detail, configure your split, and track your weekly volume at a glance.

GymSets session detail
GymSets split configuration
GymSets body weight tracking
// Built for lifters

Everything you need.
Nothing you don't.

No junk metrics, no gamification noise. Just the tools that actually move your training forward.

Log every set

Weight, reps, RPE, rest. Two taps, zero friction. Autofills from last session so you stay in the flow.

Progress photos & timelapse

Weekly photos, aligned automatically. Swipe through months. Export a 10-second timelapse for stories.

Personal records

PRs tracked automatically per exercise and per rep range. 1RM, 3RM, 5RM, 10RM — all there.

Smart rest timer

Starts the moment you finish a set. Adapts to exercise type. Silent haptics — won't wake the gym floor.

Session history

Weekly volume, muscle-group split, adherence streak. Every workout you've done, forever searchable.

Export & share

Story-ready templates for your social media. Watermarked with your stats. One tap, share the win.

Evidence brief · 3 min read

One number drives muscle growth.
Most apps don't track it.

A decade of meta-analyses points to weekly hard sets per muscle as the strongest controllable variable in hypertrophy. Going from 5 to 12–15 sets per muscle per week roughly doubles the muscle gained over 2–3 months.

Read the full guide
~10
minimum effective sets per muscle, per week
12–20
productive range — where most growth happens
RIR 0–3
what counts as a "hard set"
People with a concrete goal are 3x more likely to achieve it.
Get notified at launch
// Almost there

We'll email you
when GymSets goes live.

Final touches before launch. Drop your email — one notification, then nothing until you ask for it.

Join the waitlist →