Sodalio

Sodalio is a journal app where you record your day by talking with an AI character. I tilted the experience away from "writing" toward "talking," and built the rest of the product around making the habit easy to keep.

The question I started from

The number-one reason journaling stalls is the blank page itself. Having someone ask "how was today?" flips a switch that simply staring at an empty form never does. Sodalio replaces that "someone" with an AI character.

What I tuned

• Question granularity by scene — morning, evening, low-mood days each get a different opener
• The conversation log is editable; whatever you let slip when answering is exactly the thing you will want to revisit later
• The character's presence is warm but never pushy — close enough to nudge, far enough not to intrude

Engineering notes

• Hybrid pipeline: lightweight on-device formatting plus targeted cloud-model calls only when needed
• Network calls minimised to protect battery
• Conversation history stored encrypted

What I learned

A "talk to AI" experience is less a convenience feature and more a soft habit. To sustain it, what matters is not that the AI is clever — it is that the AI does not get in the way.