JustYou is a notes app for iOS 18 or later built around a chat with yourself, keeping quick thoughts out of the conversations you have with other people. Notes stay in searchable threads. Lists and reminders are available in the same conversation, and no messaging account is required.
Start with a typed note. Paste a link or add a hashtag you can search for later. Slash commands give the input field a second role: a reminder command can include a day, time, and task, while a list command turns a string of items into a checklist. The developer's description also covers voice notes and document scans. I'd begin with typed notes and reminders, since those reveal whether the chat format helps you find something after capturing it.
According to the privacy policy, notes stay on the device unless you enable personal iCloud sync. Link previews are another opt-in feature because fetching one contacts the linked website. A PIN or Face ID can lock JustYou. Those separate choices matter for iPhoners who want quick capture without automatically sending every pasted URL out for a preview.
I think JustYou makes sense for short thoughts that arrive throughout the day, especially when they need a reminder attached. If you already send yourself reminders in a chat app, try moving one recurring thread and check whether search and checklists make it easier to use afterward.
