Talk about your day, explore ideas, and work through decisions. Merrin remembers what matters, connects your thoughts, and helps you discover patterns over time. Privately, on your device.
Insights
Your week · Sep 28–Oct 4
6entries
3 chats · 2 threads moved
A busy week back from Japan
Active threads
Sized by entries
Still open
Message Alex on Friday
3 daysPick a launch date
9 daysMerrin
On-device · private
What was that ramen place I liked in Tokyo?
Ichiran in Shibuya. You wrote that the tonkotsu broth was the best you'd had.
Japan trip · Apr 2026Right — wasn't I going to catch up with Alex after that?
You were. After the trip you noted wanting to see Alex once you were back — your close friend from the Tokyo days.
Set a reminder to message him Friday.
Done — Friday, 6:00 PM. I'll bring this back up then.
Reminder setYou
Your wins
See allYou've written 50 journal entries.
Merrin· merrin.xyz
You went for a run before work every day this week.
People
12
Memories
486 new
Next up+2 more
Oct 3
Dentist
Mentioned most
See allAlex
14mentions
Today
Sara
9mentions
Yesterday
Joe
6mentions
3 days ago
Merrin is a personal intelligence that helps you think, remember, and understand yourself over time.
You talk or write about your day, and what matters — conversations, journal entries, people, and decisions — becomes a private history on your device. Over time, Merrin connects your experiences so you can notice patterns and see how you're changing.
Merrin isn't a simulated friend, and it isn't a stand-in for the people in your life. It's a private intelligence you can talk to — and the character is simply how you reach it.
I can't decide whether to take the new role.
What's pulling you toward it — the work itself, or what it says about where you're headed?
Voice or text. The same Merrin either way, and both stay on your device.
Merrin isn't something you visit once. It's for the thinking you're already doing.
Talk about an idea, a difficult decision, or something on your mind. Merrin can offer different perspectives without losing the context of your conversation.
Conversations can become journal entries. Important people, ideas, experiences, and decisions become part of your searchable personal history.
How conversational journaling worksLook back at recurring thoughts, changing priorities, or unfinished decisions. Merrin helps connect experiences across days, weeks, and months.
More ways to use Merrin, from writing messages to making step-by-step plans
Anyone can recall a fact. Merrin connects what you've talked about — and helps you see what it says about how you're changing.
What did I decide about my career last month?
You decided to finish the current project first, and to revisit the decision in the new year.
Or look it up yourself
Career conversation
12 Sep
I'll decide once this project ships.
In the app, every insight links back to the conversations behind it.How the memory loop works, in engineering detail
Sometimes you want to talk it through. Sometimes you need a different perspective. Choose how Merrin responds to your thoughts.
Merrin
On-device · private
Listener
Gentle reflection
I'm thinking about leaving my job.
What's been making you feel that way?
Sunday nights, mostly. I start dreading Monday around six.
Sunday evenings came up last week too, right after you talked about the Monday team meeting.
Open Conversation
Talk about anything
I'm thinking about leaving my job.
That's a big one. Do you have somewhere in mind, or is it more about getting out?
Kind of both. I keep looking at bakery listings, which is ridiculous.
Is it, though? You've talked about your sourdough starter more than your manager lately.
Coach
Action focused
I'm thinking about leaving my job.
What's the biggest thing keeping you from making that decision?
Money. I don't know how long I'd last without a salary.
Then let's put a number on it. What do your fixed costs come to each month? Rent, loans, the basics.
Analyst
Finds patterns
I'm thinking about leaving my job.
You've mentioned leaving three times since June. Each time, it came up during a deadline week.
Huh. So it's the deadlines, not the job?
Maybe. Though the redesign weeks had deadlines too, and you called those good weeks.
Future You
Long-term perspective
I'm thinking about leaving my job.
In March you said you wanted more time for your own projects. Does leaving get you closer to that?
It would. But I'd lose the steady income.
Fair. A year from now, which would bother you more: a tighter budget, or still not having started?
Devil's Advocate
Stress-tests your thinking
I'm thinking about leaving my job.
Before you leave, are you sure the problem is the job and not something temporary?
Pretty sure. It's been months.
In August you said things would settle once your manager was back from leave. That's next week. What if they do?
Gentle reflection
Gives you room to say what's on your mind and reflects it back with care. It asks only when it needs to, and keeps advice for when you ask.
FreeTalk about anything
Talk freely about anything on your mind, from ideas and plans to how your day went. It follows your tangents and gives its own view when you ask.
Free
Action focused
Turns looping thoughts into one small next step. It asks what's in the way, then suggests something concrete you can do.
Free
Finds patterns
Spots themes and changes across your conversations and journal entries. It sticks to what you've actually said instead of guessing at causes.
Pro
Long-term perspective
Asks what your future self will thank you for. It weighs today's choice against goals you've mentioned before, without predicting how things turn out.
Pro
Stress-tests your thinking
Challenges your reasoning with the strongest counterpoint, one at a time, so you can check whether your decision holds up.
ProListener, Open Conversation, and Coach are free. Analyst, Future You, and Devil's Advocate are part of Pro.
Talk, and what matters is remembered; over time, Merrin connects your experiences so you understand them. A simple loop that becomes more useful the longer you keep it.
01
Talk about your day, an idea, or something you're working through — by voice or text.
02
What matters becomes part of your personal history: conversations, journal entries, people, and decisions.
03
Over time, Merrin connects experiences and helps you notice patterns — and how you're changing.
Merrin's core intelligence runs on your device. Your conversations, memories, and journal remain under your control.
Core AI processing runs on your phone, not on a remote server.
Once the models are installed, the core app keeps working without a connection.
See, edit, or delete your personal data at any time, and back it up to an encrypted file.
What you control
We read the policies of ChatGPT, Gemini, Claude, Copilot, and Grok and quoted what they actually say
Some features use the internet when needed — for example downloading AI models, processing purchases, checking configuration and updates, or optional diagnostics and online services. These are described in the Privacy Policy.
Start free, with no message limits. Upgrade when you want to see how your thinking changes.
A private place to think.
Personal intelligence that grows with you.
Everything in Free, plus:
For early supporters. Pay once.
Free helps you capture your thoughts. Pro helps you understand them.
Upgrade anytime. Pro's insights use the history you built on Free.
Merrin is in final development and is coming soon to the App Store and Google Play for supported iOS and Android devices. Join the waitlist and we'll email you the moment it's available.
It means Merrin is built around your own history rather than general knowledge. It recalls what you've talked about, connects experiences across days and weeks, and uses that context to make later conversations more relevant — privately, on your device.
Merrin is designed so its core AI operates on your device. Your conversations, journal entries, memories, transcripts, and generated insights are intended to stay on your device during normal local use. Some features do use the internet, for example downloading AI models, processing purchases, retrieving configuration, and optional diagnostics or online services. Merrin is not funded by selling your conversations, journal entries, or memories for advertising, and it doesn't use that content for targeted ads. Optional analytics, enabled only with consent where required, may record events such as app opens, model downloads, or crashes, not your journal or conversation text.
On-device means the language model runs on your phone instead of a remote server, so your conversations stay local during normal use. Once the AI models are installed, core features such as conversation, journaling, search, and memory are designed to keep working without an internet connection; the first model download and purchases need one. For personal conversation, journaling, and recall, on-device models are capable and private. Very large cloud models can still handle more knowledge-heavy tasks, but they need your content sent to a server. Quality and available features can vary with your device's hardware and storage.
Yes, at any time and without contacting us. In the app you can view what Merrin remembers, edit or delete individual memories, exclude individual conversations, and turn memory off. To erase everything, open Settings and choose the delete or reset option; it removes all locally stored data, including conversations, journal entries, memories, transcripts, insights, and downloaded AI models. Merrin doesn't require an account, so there's nothing to close or deactivate. Because this data lives on your device, deletion is immediate and permanent, and we do not keep a server-side copy. Uninstalling the app also removes its local data.
Yes, with encrypted backup and restore, under Settings → Privacy & Data → Backup & restore. Merrin saves your conversations, journal entries, memories, and settings to one encrypted file, protected by a recovery key that's created with your first backup. You choose where the file goes through your phone's share sheet; Merrin doesn't upload it or keep a copy online. To restore on a new phone, install Merrin, choose Restore from Backup, and enter your recovery key. Restoring replaces the data on that phone. Keep the recovery key safe, because we can't recover it for you. The backup file can only be restored in Merrin; it isn't a readable export or a file other apps can import, and Merrin has no automatic cloud backup or sync. Deleting data in the app doesn't delete backup files you've saved elsewhere.
Free has no message limits. It includes text and voice conversations, journal entries saved from your conversations, memories you can view and edit, search by meaning, encrypted backup and restore, and the Listener, Coach, and Open Conversation perspectives. Pro adds insights into what keeps coming back and how your views change, weekly reflections, a longer view of your memories, the Analyst, Future You, and Devil's Advocate perspectives, and a larger AI model. You buy Pro in the app through the App Store or Google Play, which process the payment, so we never receive your full card details. The store's entitlement information is linked to your user identifier so Pro unlocks and can be restored if you reinstall the app or move to another supported device. Subscriptions renew automatically unless you cancel them in the store's subscription settings, and refunds, billing periods, and taxes follow the store's policies and your local consumer law.
No. Merrin is an AI system, not a person, therapist, or substitute for professional advice. It is built for reflection, journaling, and self-awareness — not medical, mental-health, legal, or financial advice, and it is not an emergency service. AI output can be inaccurate, so use your own judgement.
Merrin is a private personal intelligence that helps you think, reflect, and remember. Join the waitlist and be first to know when it's ready.