Rainku vs Day One
Day One keeps what you write. Rainku starts the writing for you and hands back something publishable. If you already journal and enjoy the craft, Day One is the better canvas. If you stall on the first sentence, Rainku removes the sentence you have to invent.
The table below compares the two on six dimensions. Rainku's own numbers — price, platforms, languages — are listed underneath.
See what it writesSix dimensions, side by side
| Dimension | Rainku | Day One |
|---|---|---|
| How an entry starts | The AI asks the first question. You answer. | A blank page you fill yourself. |
| How you put words in | Speak or type, in conversation. | Type, plus photos, video and drawing. |
| What comes back out | A composed entry, a poster with your photo and your text, and an optional GIF. | What you put in, preserved and laid out well. |
| Looking back | A calendar you flip to any past day. | On This Day, maps, weather and activity logging. |
| Structure | Four scenario entries — breakup, postpartum, expat, career pivot — each with prompts written for that state. | Multiple journals, tags, templates. Total flexibility, unguided. |
| Where the entry can go | Stays private, or becomes a post in one step. | Stays inside Day One. |
What Rainku costs and where it runs
Free — every account gets 30 Credits refreshed daily, unlimited entries, the rain, and poster export. No card.
Pro — $8 a month or $80 a year, for 3,000 Credits a month, higher Effort levels, and voice-guided conversations. Prices as of 2026-07-02.
Where it runs — any browser, on phone, tablet and desktop. Nothing to install. An iOS app is in the works.
Languages — six, served in full: English, 简体中文, 日本語, 한국어, ไทย and Bahasa Indonesia. The prompts in each are written in that language, not translated into it.
How you write
Rainku — Rainku starts from a quiet entry: full-screen rain on a loop, audio included, to slow you down first. Then the AI asks a few things in the chat window: what's most on your mind today, which thing from last week you haven't actually dealt with, where you're standing after some recent change. You can speak or type. After the conversation, the AI organizes the scattered answers into a structured journal entry.
Day One — Day One is a beautifully designed digital journal. You type, attach photos, paste videos, sketch with a brush. It supports multiple journals, tags, and templates. The whole experience is manual and creative, with no AI conversation.
Two fundamentally different paths. Rainku fits people who want to record but get stuck on the first sentence — and who want the moment to leave the page after. Day One fits people who enjoy the craft of journaling and want a beautiful canvas.
What you get back
Rainku — Each conversation produces three things: an AI-organized, structured journal entry; a publishable image-and-text poster; and an optional GIF. The same raw moment can stay private, or go straight to social.
Day One — Day One preserves what you put in, organized beautifully. It has maps, weather, activity logging, and "On This Day," which resurfaces past entries from the same date. The journal becomes a rich multimedia archive.
Rainku auto-generates publishable artifacts. Day One keeps your input intact and presents it elegantly.
Customization and entry points
Rainku — Rainku has scenario entries built around life inflection points: breakup, postpartum, expat, career pivot. The conversation prompts in each entry are tuned to that state. Rainku is also native in six languages — English, Chinese, Japanese, Korean, Thai, Indonesian — and the prompt phrasing in each isn't translated; it's how someone in that language would actually write.
Day One — Day One offers multiple journals, templates, tags, and rich formatting. Structure is fully under your control because you write everything. The flexibility is total but unguided.
Rainku gives you guided structure through scenario entries. Day One gives you a blank canvas with organizational tools.
Why pick Rainku alongside Day One
No blank page
The hardest part of journaling isn't the writing — it's the first sentence. Rainku removes that barrier by having the AI ask the questions in the chat window, so you're never staring at an empty input.
Designed for life inflection points
Day One is a general journal. Rainku has scenario entries built around real life turning points — breakup, postpartum, expat life, career pivot, gap year. If you're going through one of those right now, the prompts in that entry will hit your actual state more sharply than a generic prompt.
Related
What an AI journal app is — the category, and how the conversational kind differs from the write-first kind.
A private journal — how your writing is stored and protected.
Rainku as a daily diary app — plans, devices, and what a normal day looks like.
Want your journal to leave the page?
Sign in and see what your AI writes back.
Start tonight's entryRainku's figures verified against this repository on 2026-09-14. Day One details sourced from its App Store listing and public website.