RiddleBoox

vominh

About this app

RiddleBoox is a native Android AI diary for BOOX e-ink tablets. Write with
your stylus, lift the pen, and a companion answers — in the same medium your
thought began in. No keyboard, no chat bubbles. Just ink on paper.

WRITE TO THINK
Say it before you explain it. Your hand can wander, hesitate, and stop — the
unedited sentence is enough for a companion to begin listening. When you lift
the pen, the page makes room: the pause is not a loading screen, it's the
moment your companion gathers the thread.

A COMPANION, NOT A COMMAND LINE
RiddleBoox keeps the interface quiet so the relationship can feel human. You
write as yourself; your companion listens without asking you to make the
feeling neat, then writes its reply back onto the page in handwriting.

ONE COMPANION, MANY WAYS TO BE THERE
Create agents for the different roles a companion can take on:
• A friend to confide in
• A reading companion who can search your library, follow highlights, and
find the next book
• A tutor for practicing a language as you write
• A reflection companion for naming a feeling and thinking through a next
step — a gentle space, not a replacement for professional care
Each agent has its own name, personality, and memory.

REMEMBERS THE THREAD
RiddleBoox keeps the evenings when something felt heavy close by, so you can
return to a thought instead of starting from zero. Multi-turn memory lives on
your device.

BUILT FOR THE MEDIUM
Onyx stylus input and e-ink refresh pacing keep the interface out of the way,
so the companion can listen before it reaches for advice.

WHAT YOU NEED
• A BOOX (Onyx) Android tablet with an active stylus
• Your own API key for an OpenAI-compatible AI service (RiddleBoox works
with OpenRouter and other compatible providers out of the box — bring your
own key, configured once in Settings)

A NOTE ON CARE
RiddleBoox can be a gentle space to reflect, but it is not a therapist,
crisis service, or substitute for professional mental-health care.

Made for the page that comes before the prompt.

What’s new

Improved app performance and reliability.