Hikki

Hikki is a notebook for iPhone, iPad and Mac that keeps your pages on your own devices and syncs them through your own iCloud.

YOUR NOTES STAY YOURS
• Each page is kept on the device first. With iCloud on, it syncs through your own iCloud account. Or keep it on this device only.
• No account. Open the app and write; everything works offline.
• Changes reach your other devices in moments. Hikki runs no server for your notes and can't read them.
• Two devices editing one page keep both versions, side by side. Nothing is overwritten.
• Thirty days of history: go back to how any page read, compare word by word, restore.

WRITE IN BLOCKS
• Type / for headings, to-dos, tables, toggles, callouts, code, math, drawings and embeds.
• Drag a block by its handle, or drop it beside another to make columns.
• Mention pages with @, link to a single block, comment on a passage.
• Type @ and a date, like “next Friday 3pm”, and have it ring on every device.
• Lock a finished page so nothing changes by accident.

AI ON YOUR OWN KEY
• Bring your own OpenAI or Anthropic key. Requests go straight to the provider; nothing passes through our servers.
• Select a passage and improve it, fix it, shorten it or change its tone. The change shows in the page, struck through and added, and nothing is replaced until you accept it.
• Ask about the page beside it, with other pages added by @, pictures and PDFs attached, and web search with its sources linked.
• Ask the chat to change the page and approve each change, or ask for a picture and it draws one.

FOR LANGUAGE STUDY
• Select a word and Hikki suggests its furigana, then sets it above the kanji.
• Search reads titles, text, PDFs and the words in photos, in English, Chinese and Japanese, even by pinyin.

ONE APP FOR EVERY DEVICE
• Mac: native windows, tabs, split view, menus and keyboard shortcuts you can rebind.
• iPad: sidebar, tabs and two pages side by side.
• iPhone: the page tree in a drawer, a keyboard bar for every block, actions a th…