We are on a mission to build the best lifestyle app in the world, and we ship in the open. Here is every update since April 2025, a little better every day.
The native app ships, and the notes surface grows links, sharing, and a drawing canvas.
An empty note can become an infinite drawing board. Pen, highlighter and eraser with pressure-sensitive ink, pan and pinch-zoom, undo, and a camera that remembers where you left off. Drawings show as miniatures on note cards, and shared drawings can be explored by anyone with the link.
New landing page, new screenshots of the new app, a redrawn logo mark, and fresh social preview artwork.
Links in notes arrive on iPhone: tap to open, press and hold to edit, copy or remove, all in step with the web editor. Very long notes type smoothly again, the scrollbar stopped creeping over your words, pulling down on a note now reveals its date with a gentle click, and members no longer see a brief paywall flash at launch.
Create a read-only link to any notebook note. The page needs no account, updates live as you edit, and dies instantly when you revoke it. Your writing never appears in link previews.
Notes gained optional titles, the editor gained H2 to H4 headings, a batch of editor bugs went away (including three vim fixes), and Settings gained a one-click CSV export of your journal, habits and metrics.
The iPhone app was rewritten from scratch as a fully native app. It opens instantly, works completely offline, and syncs both ways with the web, with live updates between devices. Every mood bird, the app icon, onboarding, the paywall and every empty state were redrawn, and the whole app speaks nineteen languages.
A change-feed sync engine with an offline outbox: edits made in a tunnel arrive when you do, updates carry every existing account across without signing anyone out, and open editors follow edits from your other devices.
Notebooks are born, writing goes full screen, and the native rewrite gets serious.
Morning pages, gratitude, ideas and dreams each get their own notebook with its own colour, on a shelf that opens with a satisfying flight animation. Search reaches across all of them.
Journal, notebooks, habits and metrics all moved onto an on-device database. Screens answer the finger immediately and the network catches up in the background.
A rebuilt onboarding that works fully offline, a meditating mascot on the launch screen, and a moment of light and haptics when you make the promise to yourself.
Full modal editing on the web journal for keyboard people: motions, counts, operators, visual mode, and a block cursor that behaves. Off by default, one toggle away.
The line you are writing stays centred as the page scrolls beneath it, and a quiet word count keeps score in the corner.
Writing becomes the centre of gravity.
Reflections opened up into a full page of their own on the web, with a smooth morph from the day's card into the writing surface.
The reflection editor learned bold, headings, lists and quotes, opening with a smooth native zoom on iPhone and a stretchy formatting sheet.
The five mood atmospheres were rebuilt on a GPU canvas so they glow and drift without costing a frame.
The daily ritual gets a coach, and charts learn to talk.
Onboarding became a personal conversation: your goal, what keeps breaking it, and what a good day looks like, ending in a plan the app actually uses.
Metric detail pages gained time-range navigation and charts you can interrogate with a finger.
Each of the five moods paints the day's screen with its own animated atmosphere, and the mood prompt earned a travelling beam of light.
Steady polish across the log, haptics, and the home page.
The website's face caught up with the app, and daily highlights were refreshed.
Completing a habit, opening the yearly overview and browsing metrics all gained tuned animations and haptic feedback.
The reflection log became a cleaner, faster reading surface for your past days.
Three Cells learns to speak nineteen languages.
The whole app was localised: onboarding, paywall, every label, with a language switcher and locale-aware dates. Arabic through Vietnamese.
Glass-effect buttons in the journal, animated task and habit cards, and consistent close buttons across every sheet.
Your year, wrapped.
A year in review that turns twelve months of moods, habits and reflections into a story you can flip through, with shareable stat cards.
Full search across reflections arrived on the iPhone app.
The web app catches up, and the blog begins.
The mood calendar and the yearly view were redesigned on both platforms, with colour-coded days and yearly summary cards.
New arrivals on the website got a real onboarding of their own, and the pages got dramatically faster.
First posts on journaling, habits, and why writing a day down changes it.
Tracking numbers stopped being iPhone-only, and habits became editable everywhere.
The writing experience gets its first real care.
Daily reflections gained a dedicated full-screen editor that respects the keyboard instead of fighting it.
Notifications arrived, per habit, at the times you choose.
Performance and trend charts gained dots and tooltips, and the app learned to refresh itself at midnight.
Three Cells reaches the App Store.
After six months as a web app used every day by its maker, Three Cells shipped to the App Store: journal, habits, metrics and moods in one daily check-in.
One-tap export of everything you have recorded, and full account deletion, from day one week one.
The iPhone app takes shape.
Weekly and monthly performance, streak views, animated graphs, a daily summary card, and one-tap sign-in with Apple.
Track any number that matters to you: sleep, weight, focused hours, anything, with a satisfying wheel picker.
The mobile app gained the habits heatmap, multi-date entry, and the reflection log.
One person builds the tool they wished existed.
The project became a monorepo and the first iPhone screens were built.
Daily habits with a yearly calendar view joined the three cells, along with tasks and keyboard shortcuts.
The very first version: write a reflection, score the day, see it on a yearly calendar. Inspired by Jim Collins' daily spreadsheet and built because its maker wanted to use it.
Your journal, habits, mood and metrics in one place, on your phone and on the web, getting better every week.
Works in any browser · iOS app syncs the same shelf