Merrin is your private personal intelligence. From writing a thoughtful message to planning your next big idea, it helps you think things through, organize what matters, and remember what you've learned.
Private by design. Powered by on-device AI.
Most AI chats start from a blank slate. You explain the background, get an answer, and next week you explain it all again.
Merrin is a personal intelligence. You use it to talk through ideas, work through decisions, and draft messages and plans. Along the way it keeps a private history of what matters to you, so later conversations can build on earlier ones.
You decide what it keeps. The more context you choose to keep, the more useful Merrin becomes.
Messages worth sending.
A birthday wish, a professional reply, the message you've been putting off. Tell Merrin what you want to say and it drafts it for you. Ask for it warmer or shorter, then copy or share it. Emails open in your mail app, ready for you to send.
From thinking about it to figuring it out.
Planning a trip, organizing an event, or working toward a personal goal? Merrin breaks it into numbered steps. Copy them into your notes, or share the plan as an image.
A space for unfinished thoughts.
Not every thought starts as a clear question. Talk about what's on your mind, switch to the Listener or Coach perspective, and work out what you actually think.
Your thoughts, not forgotten.
Conversations can become journal entries, and Merrin keeps memories you can see and edit. Search by meaning to find something you said weeks ago, even if you've forgotten the exact words.
See what you might have missed.
Journal entries on the same subject gather into threads, so you can follow one topic across weeks. With Pro, Insights also shows what keeps coming back and how your views change, with the entries behind each one.
How cards work
Just ask, or start with /message, /email, or /plan. Tap Refine to revise a card in place. Cards never send or share themselves; every action waits for your tap.
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Tell Merrin what's on your mind: a question, an idea, a story, or something you're trying to figure out. You don't need a perfect prompt.
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Merrin helps you explore the idea, find the right words, or look at it from another perspective. When you need a draft or a plan, it puts one on a card.
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Conversations can become journal entries and memories, so you don't have to write everything down yourself.
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Come back to an earlier idea, revisit a decision, or look for patterns across your experiences. What you said before gives the next conversation context.
You share ideas, plans, and personal experiences with AI. That shouldn't disappear when the chat ends.
Your past conversations and saved memories give Merrin context, so you don't have to explain everything from the beginning each time.
Merrin's core AI runs on your device. Once the models are installed, conversation, journaling, search, and memory keep working without an internet connection. You can see, edit, or delete what Merrin remembers, turn memory off, and delete your data at any time. An encrypted backup, protected by your recovery key, lets you restore it all in Merrin later.
A good conversation shouldn't end as text you never open again. It can become journal entries, memories, plans, and drafts you come back to.
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.
Say you've been wondering whether to ask for a four-day week. It comes up now and then over a couple of weeks, in between everything else you talk about.
Talk it through
I want to ask for a four-day week, but not before the launch. I'm also worried it'll look like I'm not committed.
There's nothing to write up afterwards. The conversation is saved as a journal entry, and the details worth keeping become memories you can see and edit.
Ask what you said
What was holding me back on the shorter week idea?
You wanted to wait until the launch was done, and you were worried a four-day week would look like you weren't committed.
Merrin searches your past conversations by meaning, so it can find the earlier one even when you word it differently. You can also search them yourself in Look Back.
Notice it keeps coming up
Recurring themes
The four-day week keeps coming up
You've brought it up on three different days in the past two weeks.
Across your entries · View sources
Is this right?
When a subject comes up on three different days within two weeks, Insights points it out. Open the sources to reread what you said each time, and mark the insight Accurate or Not quite.
Entries on the same subject also gather into a thread, with its own timeline of what you said and decided. Merrin only shows a pattern when it can point to the entries behind it. It points out what keeps coming up and leaves the conclusions to you.
Journaling, memories, search, and threads are free. Recurring themes and weekly reflections are part of Pro.
Write a message, make a plan, explore an idea, or remember a moment. Start with one conversation and see where it goes.