A journaling app for iOS & Android

A Space
Built for your Thoughts.

Write freely. Track your mood. Reflect with intention. Lost in Thought meets you where you are.

Tailored writing prompts

Multi-mood tracking

Insightful weekly reflections

Monthly summaries

Goals & intentions

Built with privacy first

About

Built by someone
who needed it.

"I needed an app to help bridge the gap between my thoughts and therapy. None of the most popular journaling apps do that, so I decided to build what actually made sense to me."

Lost in Thought started with a conversation Jack had with his therapist at the end of 2024. She asked if he'd been keeping up with his journaling. He hadn't, because he never had his journal on him when he needed it most. He decided to build the app he wished existed.

Designed and developed by a software engineer and strong advocate for the benefits of therapy, the app is built privacy-first. Your entries are encrypted. Your data is never sold. AI is used sparingly and intentionally, only for writing prompts and reflections. NEVER to replace the human act of journaling.

— Jack Mahoney, Lost in Thought Creator

100%

Human designed icons and artwork

Third parties your data is shared with

2025

Built from scratch, by one person

Private

Encrypted entries, always

On AI in Lost in Thought

AI is used only for writing prompts and weekly/monthly summaries. Never to read, store, or analyze your entries without your action.

Lost in Thought believes in the power of therapy and human connection. Technology should support, not replace, that connection. Your journal is yours.

Mood tracking

How are you,
really?

Check in with your inner weather throughout the day. Over time, patterns emerge and you begin to understand yourself in ways journaling alone can't reveal.

Log multiple moods through the day
View your emotional history in All Entries and Insights
Weekly and Monthly summaries surface your patterns

Happy

Calm

Anxious

Sad

Angry

Tired

Bored

Frustrated

Grateful

Scared

Silly

Stressed

Journal

Write the way
you think.

Text, audio, gratitude,or images — Lost in Thought adapts to how you want to capture the moment. Writing prompts help when words won't come. Better understanding yourself keeps you coming back.

Text, audio, gratitude, & image entries
Write, speak, or capture moments visually. All in one calm flow.
Writing prompts
Custom nudges built for youthat go deeper, never generic.
Goals & intentions
Set weekly and monthly intentions. Track what actually matters.

Choose text, gratitude, audio, or image journal

FAQ

Questions, answered
honestly.

Lost in Thought is built around calm, intentional journaling, to help sort through your thoughts. Writing prompts help when words won't come. Mood tracking shows your emotional patterns over time. And AI is used only where it genuinely helps, never to replace the act of reflection itself.

Yes. Your entries are encrypted and stored securely. Lost in Thought does not sell your data or share it with third parties. Only when you explicitly use the writing prompt feature does that entry go to a private, controlled AI instance — never to public or third-party services.

Sparingly and intentionally. All art, icons, and features were designed and built by humans. AI is used only for writing prompts and weekly/monthly reflections; these are specific features you can actively choose to use. Mental health isn't solved by AI. It's solved by you showing up.

Download from the App Store or Google Play, create an account, and write your first entry. The free tier gives you access to all core journaling features. Upgrade anytime for additional prompts, extra usage, mood history, and monthly summaries.

Navigate to Settings → Delete Account. Your entries are permanently deleted after 30 days, but recoverable within that window if you change your mind.

Journaling helps you process your thoughts, reduce stress, and spark creativity. Many people use it to reflect on their day, week, or month. Studies have shown journaling can support mental health and well-being. I personally use it every day to help work through my thoughts and feelings, as well as prepare for therapy sessions.

Check your spam folder or try filling out the form again. You can also watch this YouTube video for step-by-step instructions: Creating a Lost in Thought Account.

Resources

Journaling helps.
So does real support.

Lost in Thought supports your wellbeing — but it's not a replacement for professional care. If you or someone you know is struggling, these organizations are here.