Kokoro Nikki: Journal & Diary

Kokoro Nikki: Journal & Diary

Voice to text, emotions named

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Released
April 28, 2026
Updated
October 17, 2026
Kokoro Nikki: Journal & Diary screenshot #1 for iPhone
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About

Speak or write what's on your mind. Kokoro Nikki turns it into something more: a visual map of your emotions, a kintsugi timeline that honors every crack and every repair, an interior landscape that grows with you. No account. No streaks. No guilt. WHY KOKORO NIKKI Whether you're new to journaling or have kept a diary for years, Kokoro Nikki gives you a gentle, judgment-free space to capture what matters. On the days you have time, and the days you don't. WHAT IT DOES • A home you arrange yourself: turn blocks on and off, and put them in the order you want • Voice journaling: speak and the app turns it into text • AI emotion analysis: the app reads the entry and names the feeling behind your words. It reflects, it never grades • Thought threads: answer an entry from months ago, and read both together • Interior Landscape: a watercolor that emerges from what you write • Kintsugi timeline: your whole story, cracks and all, including the times you come back after a pause • Emotional patterns: how your mood moves over time • Daily reflection prompts: questions to sit with, not tasks to complete • Haiku mode: a day in 5-7-5 • Seasonal themes: the app moves with sakura, summer, autumn leaves and winter • App lock with Face ID, Touch ID or your iPhone passcode • Write by voice in up to 25 languages, independent of the app's interface language • Interface in English, Spanish and Japanese • Your entries are stored on your device OPEN IT AND WRITE No sign-up, no password, no form. I do not ask for your email. No badges, no streak counters, no "we missed you" messages. If you step away for a week or a season, the app is simply there when you return. A QUIET RITUAL Most journals ask you to perform. Kokoro Nikki asks you to notice. Speak or write, then let your words become a landscape, a line of gold, a reading of how you've been. The entry is the seed; what comes after is the garden. YOUR PRIVACY, WITHOUT THE FINE PRINT I would rather be exact than sound good: • Your entries are stored on your device. • The audio of your recordings is never uploaded to a server I run. • Voice transcription tries your iPhone's local recognizer first. If that does not work, Apple's speech service completes it, and in that case the audio leaves the device to become text. • Emotion analysis is optional. It sends the entry's text, never the audio, to a secure service that returns the result. You can decline it and keep writing. • Your journal is never sold and never used to train AI models. FREE TRIAL AND SUBSCRIPTION The annual plan starts with a 7-day free trial with everything included. A subscription is needed to write new entries, but your diary does not go anywhere: everything you wrote stays readable, and so does what the app read in it, and you can export all of it whenever you want, as a Markdown file that carries your data in JSON. The amount and the renewal date are shown in full before you pay, with no extra tap. If you take the year, a notification thirty days before it renews tells you the date, the amount and how to cancel. No surprise charges. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://kokoro-nikki.com/terms Privacy Policy: https://kokoro-nikki.com/privacy
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What's New in Kokoro Nikki

1.4.1

October 17, 2026

Writing in vertical holds still now. Until this version, in the vertical editor on iPhone, the cursor could stand a whole column away from the words it belonged to, most of all after deleting. A number of two digits could swallow the next thing you typed, so that 12 and then 8 became 18. A number of three digits lay on its side while you wrote it and stood upright once kept, sometimes broken between two columns. And the columns were shorter while writing than while reading, so a sentence of one column became four. Now the cursor is drawn beside your text, where the next character will go. Columns are as long as they are when you read them. Numbers look the same in both places: one or two digits share a single upright cell, three or more stand one by one, and a number is never cut between columns when it fits in one. Keep, on the writing sheet of your home, now opens the entry you saved, the same as the Write tab. A new landscape no longer appears over the words you are writing or editing. It waits until you stop, it arrives once, and it does not come back after you close it. Your home opens in one piece: the blocks no longer arrive on top of each other for a moment. In dark mode, the question of the day no longer flashes red while it loads. ——— Thursday, 15 October 2026 It has rained almost every day this week. I have a full-time job, and Kokoro Nikki lives in the hours around it, in the evenings and on weekends. In the middle of one of those gray days an email arrived from someone who keeps a vertical diary. It went through, one by one, the places where the editor got in the way: the cursor a column away from the words, the number that swallowed the next digit, the column that ended before its time. I made the vertical editor so that a diary in Japanese could be written the way it is read. One person sitting down to use it with care was enough to show me where it was still a draft, and when the hours are few, that is the kind of help that decides what comes first. This version is my answer to that email. Thank you for writing. M

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