Kairos by SKOHscripts

What makes it different: it plans your day for you. Most to-do apps leave you with a long list and the question "what now?". Kairos answers it:

• It ranks your tasks: you give each task a priority (P0/P1/P2) and a size in Fibonacci points. Kairos computes a score that also weighs the deadline, and "Why this position?" shows the whole calculation. No black box.
• It fits them into the gaps of your day, around your meetings, lunch and deep-work blocks. It leaves a buffer after each meeting and tells you when the day overflows. Pinned tasks never move; blocked tasks wait until their blocker is done.
• It learns your real durations: with the built-in timer, tasks without an estimate take the median time of their past occurrences, and the stats show whether you over- or under-estimate.
• It adapts to your rhythm: hours per weekday, several working windows ("Work", "Home" contexts), an optional "afternoon dip" that avoids complex tasks after lunch, public holidays, and recurring tasks such as "every weekday" or "on the 15th".

The rest of the toolbox

• Quick capture: a Notes screen to empty your head, converted to tasks later
• Day, Week and Month views, a timeline of the day, timer alerts (estimate exceeded, forgotten timer, break)
• Optional reminders for fixed-time tasks
• Statistics: throughput, estimation bias, time by type, trends, CSV/PNG export
• Calendar import from an .ics file, or read-only display of your phone calendars (optional READ_CALENDAR)
• An optional "Team" space for managers: backlog, assignment, load and forecasts, exchanged as files, no server
• Dark theme, a choice of colour, and six languages (EN, FR, ES, DE, RU, IT)

Privacy

• No account, no ads, no telemetry
• No INTERNET permission at all: your data never leaves your phone
• Export/import as JSON, and an optional "linked file" kept up to date in a folder you choose (handy with Syncthing)
• Reproducible build, MIT licence

It also runs on Windows, Linux, macOS and in the browser, with the same features.