UnderTree: AI Mood Diary & Pet

In-app purchases
Content rating
Everyone
10+
Downloads
Content rating
Everyone
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

Are you tired of complicated daily journals? Welcome to UnderTree, the most gentle AI mood diary designed for self-reparenting and emotional growth. Whether you want to track mood, vent your thoughts, or practice self-care, our AI companion is here to listen without judgment.
Unlike a traditional gratitude journal, UnderTree turns your reflections into a living forest. Through simple AI chat, you can capture "Sparks" of your day. Watch your inner forest bloom with every entry. It's not just a notebook; it's a mental health sanctuary.
Key Features:
● Micro-journaling: No more blank page anxiety. Just chat and record.
● Mood Tracker: Visualize your inner weather with Ghibli-style aesthetics.
● Virtual Pet Companion: Meet Mochi (cat), Bubbles (dog), or Bean (frog).
● Self-Reparenting Tools: Practice mindfulness and set healthy boundaries.
● Privacy First: Secure local storage for your private diaries.

A Personal Note from the Creator:
I built UnderTree not just as a developer, but as its very first resident.
Like many of you, I’ve had those long nights where my thoughts felt too heavy and the world felt too loud. I needed a sanctuary where I could simply be—without judgment, without social pressure, and without noise. I wanted a companion to grow with, so I created Mochi, and planted this digital tree.
My only hope is that UnderTree can offer you a sliver of light. I want you to feel heard, seen, and nurtured, even in your quietest moments of exhaustion.
There is a quiet wish I hold: If the day comes when you no longer open this app, I won't be sad. I’ll be proud. Because it means you’ve found the strength to stand on your own. It means you’ve become your own forest, and you no longer need the shade of this tree to feel safe.
Until then, UnderTree is here. Let’s grow, one "Seed of Hope" at a time.
Heal your inner child. A daily mood tracker & AI companion for self-reparenting.
Updated on
Jul 10, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection

What’s new

Tending to Your Inner Garden

Reshaping Memories:
Growth is a process. You can now edit and refine your past journal entries, allowing your reflections to grow with you.

Refreshing Your Moments:
Uploaded images can now be changed, so each memory can keep the photo that feels most true to it.

A Softer Way to Revisit:
Your inner garden is easier to tend, adjust, and make your own, one small memory at a time.