One next step
Capture what matters, evening close, and a weekly review. Your day stays on this iPhone unless you choose Together.
Now on the App Store · Free for iPhone
Your calm daily OS.
Plan the day. Do the next thing. Share your wins.
Katana Personal is a private daily operating system for iPhone — one next step today, Ask that can act, Together only if you want it. Your day stays on the device until you decide otherwise.
Version 2 is coming soon.
The daily OS lives on iPhone. There is no web login — the product site is where the full story and app access live.
Katana Personal is how we take the same idea behind our business platform — one place to run the work, not ten disconnected apps — and give it to an individual.
Companies use Katana to run operations from a single hub. People use Katana Personal to run the day the same way: see what matters, take the next step, close the loop. Tasks, habits, health, and notes are there when you need them. They are not the product. The product is the day.
The loop
Plan the day. Do the next. Share only if you want.
Built around one calm daily loop — not a wall of modules.
A guide that can act
A day guide that already knows your plate — and can draft small actions for you. Free covers the loop; Katana Plus adds deeper Ask.
Only if you want it
Optional friends, a feed, shared plans, and Circles. Local-first: private life stays on the device. Share only what you choose.
Stack Cut
What does a fragmented day cost?
Tasks in one app. Notes in another. Habits, fitness, wellness, friends — each a separate place to open. Paid or free DIY: pick your stack for an illustrative money and time comparison against Katana Personal. Not a guarantee of savings.
Personal Stack Cut
Katana Personal
0 selected
How is time calculated?
Method. Estimated scattered time = category activity averages (counted once per life area you cover) + a multi-app switch model of 5 minutes per extra app, capped at 36 minutes/day. Free DIY options use 25% more activity time. Katana is modeled as one app (~10–12 min/day), so the switch add-on is zero.
What the sources are — and are not. Linked studies report findings in their contexts (for example workplace app toggling, food-diary logging, ChatGPT visit length). We adapted those published averages into this calculator. They do not study Katana, do not endorse Katana, and do not prove that you will save a specific number of hours. Results here are illustrative marketing estimates — not a clinical study, audit, or guarantee.
Money figures are public US list prices (annual effective rate when that’s the common plan). Free DIY options are $0. Time figures are Katana’s illustrative model citing the sources above — not proven personal savings and not endorsed by those publishers. Katana Personal Free is $0 for the full private day loop. Plus is $4.99/month or $39.99/year for the Accountability pack. Your habits, region, and stack will differ.
How it connects to Katana
Katana’s core business is an operations platform for companies: one hub, modules that connect, a place where work, people, and follow-through live together. Katana Personal is the same heart, pointed at a person.
| In the business platform | In Katana Personal |
|---|---|
| Hub as mission control | Today as the day’s mission control |
| Modules that deepen when you need them | Plan and Life — depth, not the home story |
| Agents and automation that can act | Ask — a guide that drafts the next move |
| People, comms, and shared work | Together — friends, plans, Circles, only what you share |
| Org-scoped privacy and access | Private on this device until you opt into cloud |
We did not bolt a consumer app onto the brand. We built the personal product from the same belief: clarity beats clutter, the next step beats the long list, and nothing should leak unless you mean it.
Katana helps a company run. Katana Personal helps the people inside those companies — and everyone else — run their own day. For product detail, privacy, and support, go to katanapersonal.app.
Katana BusinessThe operations OS this product grew from.
Katana SwitchHow data moves into Katana — and between other systems.
Your day, on this iPhone.
Now on the App Store. Free to start, private on device, built with real daily use.