At some point, I stopped asking: 
“What app can solve this?” 
and started asking: 
“What system do I actually need?”
That shift changed everything.
Most apps are designed to solve generic problems. They work well at first, but over time you start to notice the limits:
<ul>
<li>Features you don’t need</li>
<li>Missing options you do need</li>
<li>Monthly fees that never end</li>
<li>Data locked inside platforms you don’t control</li>
<li>Workflows that don’t quite fit how you operate</li>
</ul>
You end up adapting to the tool instead of the tool adapting to you.
So I started building my own systems.
Not because it’s always cheaper. 
Not because it’s faster at the beginning. 
But because it’s strategic.
When you build your own systems:
<ul>
<li>You control the data</li>
<li>You define the workflow</li>
<li>You remove unnecessary complexity</li>
<li>You automate what actually matters</li>
<li>You’re not dependent on external platforms staying alive</li>
</ul>
Most importantly, you build institutional memory. The system grows with you. It reflects how you think, how you work, and how your needs evolve.
Apps are temporary. 
Systems are compounding assets.
Every custom dashboard, automation, or internal tool becomes part of your infrastructure. You’re not just solving today’s problem you’re laying groundwork for the next one.
There’s also a mindset shift that happens.
When you build systems, you stop thinking in features and start thinking in processes:
<ul>
<li>What’s the input?</li>
<li>What’s the transformation?</li>
<li>What’s the output?</li>
<li>Where are the bottlenecks?</li>
<li>What can be automated?</li>
</ul>
That’s real leverage.
Paying for apps gives you convenience. 
Building systems gives you capability.
And in a world where tools change every year, the people who last aren’t the ones with the most subscriptions. They’re the ones who understand their workflows deeply enough to build what they need, when they need it.
Owning your systems isn’t about rejecting tools. 
It’s about refusing to outsource your thinking.

Smiley Face

John Liter

Building custom systems instead of relying on commercial apps offers strategic advantages: full data control, tailored workflows, reduced complexity, and independence from external platforms. While not always cheaper or faster initially, custom systems become compounding assets that grow with your needs and embed institutional memory. This approach shifts thinking from features to processes, focusing on inputs, transformations, outputs, and automation opportunities. The real value lies in developing deep workflow understanding and maintaining capability rather than just convenience.

Why I Choose to Build My Own Systems Instead of Paying for Apps

Any example or real world evidence would have been great.

This works for the smaller system, however this does not work in the long run or for the bigger systems. You need to add/update and maintain all the created system as well !
In this way you will spend your major time in building the system which already exists. For many of the apps you go for re-inventing the wheel.
Maybe after few years when AI becomes much more smarter this may work better.

This is great. This is the future. Just like how a personal website was a past, you will be evaluated and appointed for the system you take to a team.

This is also a good exercise in systems design by itself. In the age when BS CEOs try to convince everybody we won’t be needed in 6-12 months (Anthropic’s CEO at it again - that guy didn’t learn his lesson last year) and question whether to keep learning and honing our skills, this is really important. Somebody will have to clean the mess up at some point, as the cracks in the “AI narrative” are becoming bigger and bigger. 😉
(Don’t get me wrong - AI is here to stay, but not as a replacement, but rather as a glorified assistant and search engine)

Maybe if you are still a student and learning then that’s good. Lots of useful things to learn that won’t be taught in university.
When you already have a job then just use what’s already available and adapt to them. Otherwise making and maintaining those systems will be like a second job.