How to Use in.between: Your First Week With Our AI Sleep Journal App

Here's how to use in.between in one sentence: open it before bed, talk or type to Nalani for a few minutes about whatever's on your mind, and close it when you're done. That's genuinely the whole loop. in.between is ETAPX's AI sleep journal app, available on iOS, Android and web, and it's built so that your first night takes almost no setup and no learning curve. This guide walks you through that first night step by step, explains the choices you'll make, and sets honest expectations for your first week, so you know what to look for and what not to worry about.

We wrote this for the person who downloaded the app this afternoon, is lying in bed at 11pm with it open for the first time, and wants to know if they're doing it right. Short answer: you almost certainly are.

What is in.between, in one minute?

in.between is an AI-powered sleep and reflection journal. Each night, before you fall asleep, you have a short conversation with Nalani, an AI companion we built specifically for this job. Nalani asks a little about your day, listens far more than it talks, and saves the conversation as your private journal entry.

Over weeks and months, Nalani starts to notice things across those entries: a heavier stretch than usual, a worry that keeps circling back, a period when your mood clearly lifted. When it notices something, it may gently mention it. It never diagnoses, labels or treats anything. It just points, the way an attentive friend might, and leaves the meaning to you.

Strip away the AI and you're doing something people have done for centuries, journaling before bed. The difference is that a blank page doesn't ask follow-up questions, and it doesn't remember that you mentioned a stressful meeting three Tuesdays ago. Nalani does.

How to use in.between on your first night

There's no tutorial to sit through and no profile questionnaire to fill out before you're allowed to start. Here's the whole sequence.

1. Open in.between on whichever device you'll actually have near you at bedtime. It runs on iOS, Android and web, so your phone, a tablet on the nightstand or a laptop all work.
2. Sign in with the same ETAPX account you already use across the rest of our lineup. If you're new to ETAPX, that's the account you'll create.
3. Choose how you want to talk tonight: out loud, or by typing. You can switch on any night, and neither option is the "proper" one.
4. Let Nalani open the conversation, then say whatever is actually there. A specific moment from your day, a vague feeling, or simply "I'm tired and I don't know why" are all good starts.
5. Follow your own thread. Nalani will ask a question and give you room to answer fully. It follows where you go rather than steering you toward a topic it finds more interesting.
6. Stop when you're done. Two sentences is a complete session. Ten minutes is a complete session. There's no timer and no minimum.
7. Close the app and go to sleep. Your conversation is saved as that night's private journal entry automatically.

Voice or text: which should you use in in.between?

Both are first-class ways to use the app. We didn't build one as the real mode and the other as a fallback, and Nalani doesn't treat a typed entry as less meaningful than a spoken one. The right choice is whichever fits the night you're having.

Some people will talk to Nalani out loud every night and never type a word. Others will type every time. Plenty will switch depending on where they are. The app doesn't hold an opinion about which counts as "real" reflection, and you shouldn't either.

What does a typical in.between session feel like?

Most people spend somewhere between three and ten minutes with in.between on a given night, though nothing pushes you toward either end. The tone is closer to a quiet conversation before sleep than an evaluation. You won't see a score at the end or a mood graph pretending to be science. What you get is the conversation itself, saved as your entry.

Once Nalani has a bit of history with you, its openings change. Instead of a generic "how was your day," it starts the way someone who knows you would: with something shaped by what you told it yesterday, last week or a month ago. That continuity is the point. Each night feels like picking up a thread instead of introducing yourself to a stranger.

Nalani is quieter than you might expect from an AI product. It doesn't fill silence with suggestions or try to fix your day. If you tell it you had a rough one, it won't respond with a list of coping strategies. It will ask what made it rough and let you get to the next part on your own terms.

What a pattern reflection sounds like

Occasionally, Nalani will note something it has seen across your entries. Think of an observation like "you've mentioned feeling behind at work three nights this week." That isn't a diagnosis and it isn't advice. It's a noticing, offered once, without judgment. You can pick it up and talk about it, or ignore it and keep going. Either response is fine, and Nalani moves with you.

What's included in in.between at launch

Everything below is part of the same nightly habit and available from the first time you open the app. None of it is a separate app or an add-on.

• Nightly journaling sessions: a short, guided but unstructured conversation with Nalani, by voice or text, that becomes your private entry for the day.
• Companion Mode: a slower, more personal one-on-one register for nights when you want to talk through one specific thing rather than do a full check-in.
• Pattern reflection over time: Nalani gently surfaces recurring themes, stress patterns and mood trends it notices across entries, always offered and never forced.
• Pre-sleep content awareness: a light nudge that helps you notice what you were doing right before you opened the app, with no shame or scorekeeping attached.
• Cross-platform access: the same Nalani, memory and entry history on iOS, Android and web, wherever you sign in.
• Private by default: your entries are private to you from the moment you make them, and you decide if anything is ever shared.

Each of those deserves its own deep dive, and we've written separately about several of them. For your first week, you only need the first one. The rest will make themselves useful as you go.

How to use in.between during your first week

The most common mistake new users make with any journal is judging it on night one. in.between is designed to get more useful as it has more to remember, so your first week is more about building a little history than about getting insight. Here's what to expect.

Nights one and two: just talk

Nalani doesn't know you yet, so early conversations will feel more open-ended. That's normal. Use these nights to get comfortable with the format and to find out whether voice or text feels better for you. Don't try to give Nalani a full biography. Say what's on your mind tonight and let the rest arrive over time.

Nights three to five: notice the continuity

Around here, you'll likely start to notice Nalani referring back to things you mentioned earlier in the week. This is the moment many people realize in.between is different from a notes app. Something you said in passing on Monday comes back on Thursday, gently, as a question rather than a summary.

The end of the week: don't expect fireworks

A week is a short window for patterns. Nalani was deliberately built to stay quiet unless it actually sees something, so you may get no reflections at all in your first seven days, and that's the system working as intended. The longer stretches are where the real value shows up, often weeks in, when a thread you hadn't connected yourself gets named.

What in.between won't do

Knowing what an app deliberately leaves out tells you a lot about how to use it. We made several choices on purpose, and they shape what your nights in in.between will feel like.

• No feed. There's nothing to scroll and no one else's content waiting for you.
• No streaks, badges or scores. A two-sentence night is a successful night.
• No social layer. Your reflections never turn into content for other people.
• No lectures. Nalani won't hand you a bulleted self-improvement plan after a hard day.
• No diagnosis. Nalani doesn't label, assess or treat anything.

That last one is worth spelling out. in.between is a journaling and reflection companion. It is not a therapist, not a medical device and not a diagnostic tool, and it isn't a substitute for professional mental health care. If you already work with a therapist or another provider, think of in.between as something that sits alongside that relationship. If your reflections point toward something that needs real support, take that seriously with a licensed professional.

Tips for getting more out of the AI sleep journal app

None of these are rules. They're habits that people on our team, and in early access, found made the nightly few minutes feel easier.

• Open in.between before you start scrolling, not after. You can scroll afterward if you want to. The point is to give your own day the first word.
• Keep the app where your hands already go at night. If that's your phone's home screen, put it there. If it's a tablet on the nightstand, sign in there too.
• Be honest about short nights. "Nothing much happened, I'm just wiped" is a real entry and gives Nalani something real to remember.
• Don't perform for Nalani. Flat, uncertain or grumpy is fine. You don't need to tidy your thoughts into something presentable first.
• Let a reflection sit before reacting. If Nalani mentions a pattern, you don't have to agree or disagree that night. Sleeping on it is allowed.

We wanted the first night to feel like nothing was being asked of you except a few honest minutes. If you finished that night and thought it was easier than you expected, we did our job.

— The in.between team

Where to get in.between and how to sign in

in.between is available on iOS, Android and web. You use the same ETAPX account you'd use across our other products, and your journal and Nalani's memory carry across every device you sign in on. Start an entry on your phone in bed and the history is there when you open it on a laptop during a trip.

For current access details, open the app itself. That's where the latest information lives, and it's more reliable than anything we'd put in an article that might be read months from now.

Then pick a night, ideally tonight, and give it five minutes. It took the better part of a year to make those five minutes feel this simple. All you need to do is show up for them.

Frequently asked questions

How do I start using in.between?

Open in.between on iOS, Android or web, sign in with your ETAPX account and start talking or typing to Nalani before bed. There's no setup questionnaire and no tutorial to complete first. Say whatever is on your mind, follow your own thread for as long or as briefly as you like, and close the app when you're done. Each conversation is saved as that night's private journal entry.

How long should an in.between session be?

As long as you want it to be. Most people spend between three and ten minutes with in.between on a typical night, but there's no timer and no minimum length for a session to count. A couple of sentences before you're too tired to continue is a complete entry, and so is a longer conversation on a night when you have more to say.

Should I use voice or text with Nalani?

Whichever fits the night. Voice and text are both first-class ways to use in.between, and Nalani doesn't treat one as more meaningful than the other. Voice suits nights when you want to talk things through out loud. Text suits nights when someone is asleep nearby, you're traveling, or you'd rather not be overheard. You can switch between them any night.

When will Nalani start noticing patterns?

It depends on your history. Patterns only exist across multiple entries, and Nalani is built to stay quiet unless it genuinely sees something, so your first week may include no reflections at all. As entries build up over weeks, Nalani may gently mention recurring themes or mood trends. Those are observations for you to interpret, never diagnoses or advice.

What happens if I skip a night in in.between?

Nothing. in.between has no streaks, no badges and no guilt-driven reminders, so a missed night doesn't cost you anything. Nalani works with whatever history exists and picks up where you left off whenever you come back. The app is designed around your life rather than asking you to rearrange your evenings around keeping a record unbroken.