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Product, 2026
A personal gym and programme tracker — one clean place to plan sessions, log every lift, and watch small, consistent work compound into real progress.
Compound is a workout tracker built around a question I couldn't get out of my head:
How much weight do you actually move during a workout?
Not your personal best. Not your heaviest set. Not how many calories your watch thinks you burned.
The actual, cumulative mass you've picked up, pushed, pulled and moved.
It turns out it's quite a lot.
Compound came out of my own fitness journey.
I've tried plenty of workout trackers. Some are excellent, some don't quite work the way my brain does, and many put increasingly useful features behind increasingly expensive subscriptions.
As I've gotten back into the gym, I've been working with a great PT who's helped me establish better routines and understand my training.
At the same time, I've increasingly enjoyed building small pieces of software around my own interests and quality of life.
So naturally, I started building my own tracker.
The original idea wasn't really about reinventing fitness tracking.
It came from something I find fascinating about strength: the physicality of moving mass.
There's something inherently impressive about seeing an enormous feat of engineering and thinking about what it took to move that material. The same is true when you watch a World's Strongest Man competitor pull an airplane.
We understand instinctively that moving something extraordinarily heavy is impressive.
But that way of thinking disappears during a normal gym session.
You might know you did three sets of twelve. You know the machine was set to 50 kg. You might record a PB.
But you rarely finish and think:
I just moved several tonnes of weight.
That's the number I wanted Compound to show me.
Track every set and suddenly a fairly ordinary workout becomes thousands of kilograms moved. Keep training and that number becomes tens, then hundreds, of tonnes.
For whatever reason, my brain finds that enormously satisfying.
So I built the rest of Compound around it.
I think of Compound as my dev-brain interpretation of a workout tracker.
It's mechanical.
Sets. Reps. Weight. Volume. Frequency. Consistency. Progress.
Measure what happened and show it back clearly.
I don't want the experience to feel intimidating or obsessed with optimization. There doesn't need to be a motivational speech every time I open the app, nor does every metric need to be transformed into a complicated score.
I want to go to the gym, do the work, record it, and see what I've done.
Numbers eventually become difficult to comprehend.
5,000 kg sounds substantial.
50,000 kg sounds more substantial.
500,000 kg is mostly just a bigger number.
So one feature I've been experimenting with is translating cumulative training volume into recognizable physical objects.
Rather than simply:
1,200,000 kg moved
Compound might eventually tell you:
You've moved the equivalent mass of three Boeing 747s.
The comparison isn't supposed to suggest you literally lifted an aircraft. It's simply a playful way of giving an otherwise abstract number some physical scale.
As the total grows, so do the comparisons.
It makes an invisible part of training visible.
A workout tracker can have brilliant analytics and still be annoying if it's cumbersome when you're actually training.
That's something I'm spending a lot of time thinking about while Compound is in development.
When I'm halfway through a workout, I don't want to fill out a form.
I'm holding weights. I'm tired. I'm moving between equipment. I might have thirty seconds before the next set.
So Compound should be chunky and obvious.
Build the routine beforehand.
Start the session.
Do the set.
Tap Done.
Move on.
Large controls, minimal typing, simple feedback and as little cognitive overhead as possible.
The complexity can happen behind the interface. During the workout, the app should mostly get out of the way.
I'm also interested in making Compound useful for actually understanding what I'm doing.
Exercise names aren't always particularly helpful when you're still becoming familiar with a gym.
Which machine is that?
What does the movement look like?
Where should my body be?
What muscles am I actually training?
I've therefore been developing a consistent visual exercise library showing movements, equipment and the muscle groups involved.
That serves a practical purpose for me now, but it also gives Compound a visual language of its own: technical and instructional without becoming clinical or overwhelming.
The numbers I care about aren't necessarily the numbers fitness products traditionally make most prominent.
Of course, increasing strength matters.
But so does:
Did I go?
How consistently am I training?
What movements am I actually doing?
How much work did I complete?
How has that accumulated over time?
Compound is intended to make those answers easy to see without making training feel like another system I'm failing to optimize perfectly.
Record the work.
Watch it compound.
The name increasingly feels appropriate.
Compound is still actively being built.
I've experimented with it during workouts, but I'm deliberately not pretending it's already a finished part of my routine. I'm still working through the exercise library, routine builder, layout and—most importantly—how recording a session actually feels when you're in the gym.
Once that experience feels right, I want to start using it properly.
After that, I'd be interested in adding accounts and letting a small number of other people train with it. Their feedback would tell me whether this is simply a tracker built perfectly for my own brain or whether the same approach resonates more widely.
Either outcome is useful.
Fitness software can become surprisingly expensive.
I'm not particularly interested in building another app where the useful features slowly disappear behind increasingly aggressive subscription tiers.
If Compound eventually becomes something other people genuinely want to use, I'd rather explore whether it can remain extremely inexpensive.
Something like €1 per month. €12 per year.
If the infrastructure can be kept efficient enough to make that sustainable, that feels much more interesting to me.
A straightforward tool at a straightforward price.
No enormous fitness ecosystem required.
Just go in, lift something, tap Done, and watch the work add up.
Compound is a mechanical workout tracker that makes progress tangible—showing not just what you lifted today, but how much weight you've moved throughout your entire training journey.
The approach
Consistency beats intensity. Log the small sessions and let them compound.
Interested in working together
I take on a small number of engagements. Reach out and I'll set up a call.