Delafu Development · an iPhone app studio
Software that doesn't want anything from you.
I build iPhone apps. No ads, nothing sold on, and nothing built to punish you for missing a day — you pick one up, it does its job, and you're left holding something worth having.
Where this comes from
I'm David de la Fuente. I'm a mechatronics engineer — more than ten years on automotive systems, and still at it. This isn't the thing I left engineering for; it's the thing I do after hours.
It's the kind of engineering where something either functions or it stops an entire production line. You don't get to ship a thing that works most of the time and patch it afterwards, so you spend your days on the parts nobody will ever see — the tolerances, the edge cases, the failure modes — because those are the ones that break things.
That habit of care is what I bring here. I like knowing a thing is built properly underneath, even where nobody will ever look.
What I didn't want was to build more machinery. I wanted to make things that feel human — warm, unhurried, not tugging at you every few minutes. Tools, really. You pick a tool up, it does its job, you put it down, and you're left holding something worth having: the work you actually did today, or your grandmother telling the story about the house, kept in her own voice.
Almost nothing I use is built that way any more, which is most of the reason I started.
Chamba
In developmentPathMarkfour runs, four lanes
A to-do list assumes you are the same person every day. You are not.
Chamba starts by asking how you actually are — energized, in flow, meh, drained, anxious — and matches three to five tasks to that answer across four fixed energy lanes. The same backlog produces genuinely different suggestions depending on how you check in. That is state-based matching, not filtering or sorting, and it is the thing a neighbouring to-do app cannot copy by adding a filter.
- For
- Adults with ADHD who already gave up on static lists
- The lanes
- Urgent, Passion, Challenge, Maintenance — fixed, and load-bearing in the logic, not just the paint
- Storage
- On the device. No cloud sync of any kind, permanently.
- Refuses
- Streaks, XP, achievements, clock times, calendars — the last two were built and then deleted on purpose
- Ships in
- English and Latin American Spanish, both first-class
Relato
In development
The treea voice, held, growing
One gentle question a week, answered out loud by someone older than you.
You sit with them, the app shows this week's question, and you hand them the phone. They tap once and talk — never press and hold, because tremor and fatigue make held gestures hostile. Silence is treated as sacred: it stops generously late rather than cutting them off. What's kept is the voice, not a transcript of it. The transcript is a helper; the audio is the truth.
- For
- A family that wants to keep its stories, in the voice they were told in
- Designed for
- A nervous 75-year-old: one screen, one action, large type, no held gestures anywhere
- Kept as
- Audio in their own voice, with an editable best-effort transcript beside it
- Yours
- Full export, always free, in open formats — even if you never paid
- Refuses
- Streaks, "you missed a week", badges, analytics, and any public anything
Write to me
Title blockNo contact form, no chatbot, no ticket queue. It arrives at me.
Or write to david@delafu.dev
Anything sent from here arrives tagged, so it doesn't get lost among app bug reports.