PROGRESS, PROVEN
Estimated 1RM trends, weekly volume, muscle balance, and a wall of PRs — Cornerstone turns every logged set into the analytics that prove you're getting stronger.
Consistency Score
Elite Consistency
You've trained 18 of your last 21 planned sessions.
WATCH YOUR ESTIMATED 1RM RISE
Every set updates your estimated 1RM, charted over time for up to five lifts at once. No max-out day needed — just log and watch the lines climb.
ESTIMATED 1RM
KNOW EXACTLY HOW MUCH WORK YOU PUT IN
Track total training volume week over week, then break it down by muscle group — with projected volume from your active program so you can see what's coming.
WEEKLY VOLUME
39k lbFIND THE MUSCLES YOU'RE NEGLECTING
A muscle-balance radar maps where your volume actually lands, with last period overlaid so you can spot what's growing — and what's getting skipped.
MUSCLE BALANCE
EVERY PR, UP ON THE WALL
Your all-time bests and your freshest records in one place — estimated and tested 1RMs, top sets, and volume PRs, each detected automatically the moment you hit them.
PERSONAL RECORDS
THE NUMBERS BEHIND THE GAINS
Per-exercise deep dives
Open any lift for weight, volume, and best-set charts plus full session history.
Time ranges & comparisons
Slice everything by month, quarter, year, or all-time — and compare period over period.
Coaching insights
Plain-English callouts on streaks, comebacks, volume trends, and fresh PRs.
Volume by muscle group
See where your sets land, with projections from your active program.
Rep PRs
Track your best reps at every weight, not just your one-rep maxes.
Streaks & adherence
Workouts, average duration, and sessions per week — each trending against last period.
FREQUENTLY ASKED QUESTIONS
What does Cornerstone track?+
Every logged set rolls up into estimated 1RM trends, weekly and per-muscle volume, muscle balance, personal records, and a consistency score — across whatever time range you choose.
How is estimated 1RM calculated?+
From the weight and reps of your working sets using established strength formulas, then charted over time so you can watch each lift trend up — no max-out day required.
Can I see progress for a single exercise?+
Yes. Open any exercise for weight, volume, and best-set charts, your rep PRs at each weight, and a full session-by-session history.
What is the consistency score?+
A simple read on how reliably you're training — your completed sessions against your plan — with workouts, average duration, and sessions per week trending against the previous period.
Is there a free trial?+
Yes. Cornerstone Strength is free to download and starts with a 14-day free trial — full access, no limits. After the trial, a subscription keeps everything unlocked.
SEE YOUR PROGRESS
Download Cornerstone Strength on the App Store or Google Play, start your 14-day free trial, and turn your next workout into data that shows you're getting stronger.