About this app

Under the evening light of a quiet living room, wrap today up into one diary page — together with a character. DiaryMate is a character diary app: drop a line about your day whenever it happens, then sit down at night to look back and shape it into a page. On days when writing feels hard, a short conversation with a character is enough to turn today into words. SIT AT YOUR DESK BY DAY, MAKE A PAGE AT NIGHT Throughout the day, sit at your desk and jot down whatever comes to mind, handing it to a character (three fragments a day, free). No AI is called here — the character just answers back with a short line. Want to go deeper on one fragment? Tap "Deepen" — that’s a Premium feature — try it free for 7 days. At night, tap "Make a page," and the character looks back over what you dropped, offering a short question or two. Answering is optional. On the free plan, this conversation runs on the app’s own built-in character script (up to two exchanges) — no AI involved, and today still comes together into one paper diary page. With Premium, the same conversation runs on AI for up to four exchanges — tap "More" to keep it going. Even after a page is made, you can add one more fragment a day with "Add a note +" and have it folded into the same page, free. HOW A DAY FLOWS 1. During the day, drop a short fragment at your desk whenever something happens 2. If you want, go deeper on one with "Deepen" 3. At night, look back over what you dropped and choose "Make a page" 4. Talk it through briefly with the character 5. The draft becomes one finished paper page. Add a note later if you like (Premium can also have the AI rewrite it) The room in the background quietly shifts with morning, afternoon, and night. A DAY, WRITTEN WITH CHARACTERS YOU CHOOSE Serena (Listener), Luna (Sharp tongue), Haku (Quiet observer), Milo (Mood maker), Arcana (Appraiser), Mr. Kurosawa (Slow company) — pick up to four of the six to talk with. Among the ones you pick, the day's host rotates day by day. The same event can read differently depending on who you tell it to. Once a page is wrapped up, your companions each add a short line of their own. THE BOOK OF PAGES BEFORE Every finished page joins your book. Free, always: your last three days. Premium unlocks every page you've ever written. GOOD FOR MOMENTS LIKE Putting today into words before telling anyone else. Wanting to keep a diary but freezing up in front of a blank page. Settling your thoughts a little before sleep. Keeping a light habit by switching who you talk to. IN JAPANESE OR ENGLISH The interface and the conversations are fully bilingual — switch languages and keep the same experience. BUILT TO FEEL SAFE AND QUIET Your fragments, conversations, and finished pages are stored only on your device, and you can delete them anytime. Content reaches an external AI only for Premium subscribers (including the 7-day free trial), at the moment they choose "Make a page," "More," or "Deepen" — never otherwise. On the free plan, nothing you write ever leaves your device, and everything works without a network connection. If a Premium conversation can’t reach the AI, the app says so plainly on screen instead of a stock reply. FREE IS ENOUGH TO START Three fragments a day, a nightly wrap-up conversation on the app’s own character script (two exchanges), one addition a day after a page is made, and your last three days to read back — all free, always, with zero AI calls. Premium (¥600/month in the Japan store, 7-day free trial; local pricing shown before purchase) brings the AI: up to four exchanges when making a page, unlimited "Deepen", AI rewrite and copy of a finished page, and every page you’ve ever written. No task manager, no calendar, no social features — no sharing, following, or comments. Just you and a character, for a quiet moment. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://diarymate-ten.vercel.app/legal/privacy-en.html