About Calculator Why Grind How it works What's next Team Contact FAQ Early access
Now building

You lift.
Now show it off.

Log lifts
Track PRs
Grind Score
Social feed
Launching first on
App Store
iOS first. Android's coming after that.
MR
JL
DK
SP
Join lifters already on the waitlist
Building in public
Started building
May 2026
App in testing
Right now
Beta launch
On the way

Inside Grind

Log it. Beat it.
Share it.

Log a set, celebrate a new PR, and share it with your people. See how it comes together in this interactive preview.

Explore the three screens below the phone.

9:41●●●
Log workout04:12
Bench Press
Previous best: 215 lb × 5
1
225
5
Save
2
225
5

Simulated preview, not actual app footage. Grind is currently in development.

About Grind

Here's what you get.

Built for the gym floor. Fast, social, and actually useful.

Fast workout logging

Log a set between reps, not paragraphs. We remember your last weights so you're not typing when you should be resting.

Social feed

Follow your gym friends, hype up their PRs, and guilt each other into not skipping leg day. Basically a group chat that also tracks gains.

PR celebrations

Hit a new number and we catch it automatically. Share a card to your story and let people know you showed up.

Streak tracking

Don't break the streak. Your current run and your best one ever sit right on your profile, so you can't quietly let it die.

The Grind Score

Strength, compared fairly.

A 135 lb lifter pulling 200 lb is nuts. A 220 lb lifter pulling the same 200 lb is a solid lift, but it's not the same feat. Grind Score factors in bodyweight so you're not comparing apples to fridges.

Built on the same bodyweight-normalization math competitive strength sports already use
Calculated on our end, so it's consistent and nobody can fudge their own number
Don't want your bodyweight public? Fine. Your score still shows, the number behind it doesn't
Grind Score: Deadlift comparison

Raw numbers

Marcus R. · 220 lb BW 405 lb
Jen L. · 130 lb BW 245 lb

Applying the formula

Bodyweight-adjusted
Calculating…
MR
Marcus R.
405 lb deadlift · 220 lb BW
116.9
Locked in
JL
Jen L.
245 lb deadlift · 130 lb BW
128.7
Seriously strong
Jen's pulling 160 lb less than Marcus in raw numbers. Relative to her size, though, she's the stronger lift here. That's exactly what the score is for.

Try it yourself

What's your Grind Score?

The exact same math the app uses, calculated live. Enter a set and see where you land.

Your Grind Score
—
Enter your numbers above

Grind Score is a bodyweight-normalized strength metric, loosely inspired by systems used in competitive powerlifting. It's calculated per set here, the same way the app does it, and isn't an official competition score.

Curious how we get that number?

No black box. Click below to see exactly what happens to your numbers.

Show me the math
1
Estimate your one-rep max
We take the weight and reps from your set and estimate what you could lift for a single all-out rep. More reps at a given weight means a higher estimated max, but the estimate gets shaky past 12 reps, so we cap the credit there.
2
Run it through a bodyweight curve
That estimated max gets scaled by a bodyweight curve, calibrated separately for men and women. It's steeper at the extremes, so a 130 lb lifter and a 230 lb lifter get compared fairly, not just by raw pounds.
3
That's your Grind Score
The output is one number that means the same thing no matter your size. Log a set, get a score, see how it stacks up against your own history, or anyone else's.
Worked example: Marcus's 405 lb deadlift
Bodyweight 220 lb → 99.8 kg
Set 405 lb × 1 rep
Estimated 1-rep max 418.5 lb → 189.8 kg
Bodyweight curve coefficient 0.616
Grind Score 0.616 × 189.8 = 116.9

Why Grind

Not just another logger.

Here's what makes Grind different.

Recommended
Other apps
Grind
Log in the void
Social feed with reactions
Just raw numbers
Bodyweight-adjusted score
PRs go unnoticed
PRs caught automatically
Bigger lifter "wins" by default
Fair fight, any bodyweight

How it works

You'll be logging lifts in two minutes.

No tutorial needed. Download it, sign up, start lifting.

1
Create your profile
Sign up takes about ten seconds. Add your bodyweight if you want a Grind Score, or skip it. Your call.
2
Log your first workout
Search whatever you're lifting, punch in your sets and reps. We pull up what you did last time so you're not starting from zero.
3
Follow your crew
Find your gym friends and follow them. Your feed fills up with their PRs, streaks, and whatever else they're bragging about.
4
Compete and grow
Your Grind Score updates after every session. Chase your friends if you want, or just chase your own best. No pressure either way.

What's next

We're just getting started.

A few things already on the whiteboard for after launch.

Gym leaderboards

Planned

See who's actually pulling the biggest numbers at your specific gym, not just in your friend group.

Workout templates

Planned

Save your own splits or grab one someone else built, so you're not rebuilding the same routine every week.

Apple Watch support

Planned

Log sets and check your rest timer without pulling your phone out mid-workout.

Android

Next up

We're starting on iOS. Android's next once the beta's in good shape.

The team

Meet the founders.

We're lifters who got tired of logging PRs into the void. So we built the fix.

Andrew Lacelle
Andrew Lacelle
Founder
Michael Ambra
Michael Ambra
Founder

Contact

Get in touch.

Have a question, partnership idea, or just want to say hi? We'd love to hear from you.

founders@grindapp.fit

We typically respond within 24 hours.

FAQ

Questions people actually ask.

Is Grind free?

Yes, at least for the beta. We haven't figured out pricing long-term, but nobody's getting charged to use it right now.

iOS or Android?

iOS first. Android's coming after we get the beta feeling solid.

When's the beta launching?

We're not locking in a date yet, that's kind of the point of the waitlist. Sign up and you'll be the first to hear when it's ready.

Does it sync with Apple Health?

Not yet. It's on our list, just not in the first version.

What happens to my data?

We use your email to let you know when the beta's ready. That's it, no spam and we're not selling it. Full details are in our privacy policy.