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01 · iPhone app · Pre-release

CUEVA

A world of psychology, perception and the things you didn't notice.

An iPhone app about how mind readers, memory performers and magicians really do what they do. It performs a trick on you, then teaches you how it was done.

The CUEVA mascot, a brain in a suit, asks in a speech bubble, "Want to be the one who notices?"
Role
Idea, design and build, on my own
Status
Finished and in final checks. Not on the App Store yet.
Year
2026
Built with
Flutter, Dart, Supabase, RevenueCat
  • 82lessons
  • 236questions, in nine kinds
  • 83sounds, made in code

What it is

Learning that feels like being let in on a secret.

CUEVA teaches the psychology behind mentalism, memory and perception: how people are steered to a choice, how a stranger gives themselves away, how to remember anything. There are 82 lessons in ten topics, with games and real-world missions.

It is built around one idea. Free video already explains psychology; it cannot make you try it. So every lesson ends in something you can do to a real person that evening, and the app opens like a film.

The first minute

It opens like a film.

A building full of people, three clues most of them miss, and a guide who asks whether you want to be the one who notices. Then you choose your first skill.

The app's own opening, rendered from its code. Trimmed for length.

A few frames from it.

  • An animated cutaway of a building, every room full of people. The caption reads "Every room is full of signals."
    01Every room is full of signals.
  • People walk through an office past a picture on the wall. The caption reads "Most people walk right past them."
    02Most people walk right past them.
  • A golden brain under a spotlight above the word CUEVA.
    03The name lands in gold.
  • The first choice, two illustrated skill cards under the mascot.
    04Then you choose your first skill.

Lessons

Lessons you can touch.

This one teaches finding a hidden object by holding somebody's wrist. So there is a wrist to hold. Drag it along the drawers and feel where it lets go.

Recorded in the iOS Simulator. The drag is sped up.

Animated in-house

He stars in his own films, too.

  • Why your mind goes blankLive on YouTube
  • Why you can't stop scrollingLive on YouTube
  • The originLive on Instagram and TikTok

Thumbnails

Designed to be clicked.

  • Thumbnail: the brain mascot under a spotlight, holding up an iPhone showing the CUEVA app.
    Welcome to CUEVA
  • Thumbnail: the mascot, hand on chin, under a neon speech bubble reading THEY HATE YOU.
    Your brain can convince you someone hates you
  • Thumbnail: a glowing blueprint of a house above the words MEMORY PALACE and the thinking mascot.
    How to remember everything you see
  • Thumbnail: a hand swiping a glowing phone feed under the words WHY YOU CAN'T STOP.
    Why you can't stop doomscrolling
  • Thumbnail: the mascot sweating with spiral eyes under a dial in the red, and the words STRESS DIAL.
    Why your mind goes blank when stressed

As they appear on CUEVA's YouTube channel.

Inside the app today.

  • The Today tab, with the lesson to start with, a tip, and an illustrated game.
    01Today.
  • The Games tab, with illustrated cards for each game.
    02Ten games.
  • A game, an illustrated table under a lamp. "Tap the thing that changed."
    03Spot what changed.
  • Show Someone, tricks to perform by handing someone your phone.
    04Show someone.

What I did, and what was hard.

  • All of it

    The idea, the product decisions, the look, the content rules, the character, the sound and the code. I build with AI coding tools and test on a real phone.

  • Making it feel lit, not just dark

    Every surface sits one measured step above the last and gains a little violet, so the app reads as a lit room. Every text colour clears its contrast target.

  • Keeping lessons honest

    Each claim in a lesson carries a grade, from well tested to myth, and automated checks hold the writing to the house rules before anything ships.

  • One character, everywhere

    The mascot is drawn in code from a single file, so he is identical in the app, on the website and in the videos, and can act out a lesson.

cueva.cc

Open to new projects

Have something in mind?Let's build it.

An app, a website, a tool for your team, or an idea that is not sure what it is yet. Tell me about it in a few lines and I will reply with honest thoughts.

khaijonesy@gmail.com