Dayflow is a free, open-source Mac utility that reads your calendar events and constructs a visual timeline of your day, giving you an at-a-glance map of how your hours are actually spent.
What is Dayflow?
Dayflow is a lightweight macOS app that turns your calendar data into a chronological, visual timeline so you can see your day as a continuous flow of time rather than a list of disconnected events. It pulls from the calendars you already maintain and renders them in a format that makes gaps, overlaps, and busy stretches immediately obvious — no manual input required.
The project lives on GitHub under an open-source licence, which means you can inspect exactly what it does with your calendar access before granting permissions. For anyone who has ever felt blindsided by how fragmented their day looks once meetings and commitments are laid out end to end, Dayflow offers a quiet moment of clarity.
What does Dayflow do best?
Dayflow excels at making time visible in a way that standard calendar apps — iCal, Fantastical, Morgen — simply don't prioritise. Those apps optimise for scheduling and editing; Dayflow optimises for reflection and awareness.
The moment you open it, you see your day rendered as a timeline rather than a grid of hour blocks. That shift in framing matters: it's easier to spot a two-hour gap you forgot about, or to realise that four back-to-back calls leave zero margin before dinner. I've found myself opening Dayflow first thing each morning the way I used to open a paper planner — to get a felt sense of the day ahead before diving into the noise.
- Automatic synthesis from existing calendar sources — no duplicate entry
- Clean, linear timeline layout that reveals time density at a glance
- Zero subscription, zero account, zero telemetry (open source, inspect the code yourself)
- Minimal footprint — it doesn't try to be a full calendar replacement
Is Dayflow free?
Yes — Dayflow is completely free to download and use, with no premium tier, no in-app purchases, and no subscription. As an open-source project hosted on GitHub, the source code is publicly available. You're trusting the community and the maintainer, not a corporate privacy policy.
Who should use Dayflow?
Dayflow is best suited to people whose days are calendar-driven — consultants, managers, designers, and developers who live in back-to-back meetings and need a fast way to orient themselves without opening a full-featured calendar app. If your calendar is sparse or you schedule very little, the timeline won't tell you much you don't already know.
It's also a natural fit for anyone practising time-blocking or trying to audit how their hours are actually allocated versus how they intend to spend them. Seeing the timeline at the end of a day is a low-effort retrospective that no todo app I've tried — Things 3, Notion, OmniFocus — provides out of the box.
If you need deep scheduling power, cross-device sync with edit capabilities, or AI-assisted rescheduling, look at Fantastical or Morgen instead. Dayflow is firmly in the viewer category, not the scheduler category, and that focus is what keeps it elegant.
What are the best Dayflow alternatives?
The closest spiritual alternative is Reclaim.ai's timeline view or the Routine app, both of which layer a time-blocking canvas on top of calendar data — but both require accounts and carry subscription costs. Fantastical's day view comes close aesthetically but is built around editing, not passive observation. Morgen offers a unified timeline across multiple calendars with task integration, making it more powerful but also more complex. For pure, frictionless timeline viewing at zero cost, nothing on the Mac currently matches Dayflow's simplicity.
It's also worth comparing Dayflow to simply using macOS's own Calendar.app in day view — the native app is fine for editing but renders time as uniform rows rather than a proportional, flowing strip. That distinction is subtle until you experience it.
How does Dayflow compare to Fantastical?
Fantastical is a fully-featured calendar powerhouse with natural-language input, weather integration, invitations, and multi-account sync. Dayflow does one thing Fantastical doesn't emphasise: it shows your day as a read-only timeline, optimised for awareness rather than action. They're not substitutes — I run both. Fantastical handles all my scheduling; Dayflow is what I glance at when I want a bird's-eye view of the hours ahead without the cognitive overhead of a feature-rich interface.
