Why I Built KAVYLO

KAVYLO did not start with a finished business plan.

It started with a problem I kept running into myself: my training data was scattered across different apps.

One app for workouts. Another for nutrition. Apple Health for health data. Other tools for progress, recovery or individual parts of my training.

The information was there. But to me, it belonged together.

I train regularly myself, and at some point I realised that I was constantly switching between different apps just to get a reasonably complete picture of my own training.

Eventually, that bothered me enough to ask myself: Why don't I just build it myself?

That question became the starting point for KAVYLO.

Why another fitness app?

I did not want to build another app that simply lets you log workouts.

To me, training is much more than that.

How I train, how I eat, how well I recover and how my performance develops over time are all connected.

I wanted to create one place where these areas could be looked at together.

Training.

Nutrition.

Recovery.

Progress.

Not as separate features, but as parts of one bigger picture.

An idea became a real project

KAVYLO was much smaller in the beginning than it is today.

As development continued, more and more questions came up.

Which data is actually useful?

Which features do people really need on a regular basis?

What sounds useful on paper but adds very little value in everyday use?

How can Apple Watch be integrated in a meaningful way?

How can data from Apple Health be used better?

How can progress be presented in a way that actually helps people understand their development?

A single idea gradually turned into a much larger product.

I had to learn a lot myself

KAVYLO is an independent project.

I did not start with a large development team where every area was handled by a specialist.

That meant I had to work through a lot of very different topics myself.

App development.

Design.

Product decisions.

Apple Health and Apple Watch.

App Store Connect.

Subscriptions.

Privacy.

Support.

Marketing.

Every new area came with things I had never done before.

Learning those things has become just as much a part of KAVYLO as building the app itself.

Most of the small things are invisible later

A large part of building an app is barely visible from the outside.

Sometimes you spend hours working on something that eventually looks like a completely ordinary button to the person using it.

You build a feature.

Test it.

Change it.

Sometimes remove it again.

Or you only realise through real user feedback that a problem needs to be solved in a completely different way.

Those parts have become a normal part of building KAVYLO for me.

User feedback is changing KAVYLO

New ideas no longer come only from my own experience.

I now receive feedback from people who actually use KAVYLO.

Some tell me which data they are missing.

Others notice things that could be improved.

And sometimes one message turns into a feature that later becomes part of a much bigger update.

That is one of the things I find most interesting.

KAVYLO is no longer developing only from my own idea of what the product should be.

The app is increasingly evolving together with the people who use it.

KAVYLO is far from finished

I do not see KAVYLO as a product that will eventually reach a point where nothing needs to change anymore.

There are still many things I want to improve and develop further.

Better training analytics.

More meaningful connections between different types of data.

More integrations.

Improvements to Apple Watch and Apple Health.

And features that genuinely help people in their everyday training.

There is one principle I want to keep:

A feature should not become part of KAVYLO simply because it is technically possible.

It should provide real value.

Why I am starting this Founder Journey

From the outside, people usually only see the result.

A new update in the App Store.

A new feature.

A screenshot.

A social media post.

What people see less often is everything in between.

Decisions.

Mistakes.

Technical problems.

Ideas that get discarded.

User feedback.

Small wins.

And sometimes the question of whether an idea will work at all.

That is what I want to write about here.

Building KAVYLO.

The decisions behind the app.

The things that work.

And the things that do not.

KAVYLO started with a personal problem.

Today, it has become a real app.

And somehow, it still feels like the actual Founder Journey is only just beginning.

In the next Founder Journey post, I want to share how that first idea actually became a working app and which parts of building KAVYLO I underestimated in the beginning.