Decis — by Tab0

Decision Intelligence for Everyone.

From everyday choices to complex strategic tradeoffs, get reliable decision insights, scenario analysis, and source-backed answers in one place.

Try Decis See the product

Decis

What shows up when your records are in one place?

Look at sleep, training, meals, calendar, and AI work together and you can make comparisons like these.

Next-day HRV after 9+ hours of work with agents: −6ms
HRV the day after the week's second hard workout: −8ms
Sleeping heart rate after a late dinner: +4bpm

These differences come from de-identified sample records, and they do not show a cause.

Recovery

Know when recovery should come first.

Compare HRV and sleeping heart rate with your own recent range before choosing intensity.

Sleep

See last night in its longer pattern.

Review stages, duration, and the last 14 days instead of treating one night in isolation.

Training

Balance fitness, fatigue, and form.

See long-term fitness, recent fatigue, daily load, and TSB on the same view.

Connections

Bring your data into one place.

Connect read-only health and schedule sources while keeping control of each connection.

Answers from your own records

When the evidence is thin, Decis says so.

Every answer is organized into a conclusion, evidence, interpretation, next action, and data coverage. When samples are small or findings show only correlation, the answer says so.

Five sections from conclusion through data coverage
Sample limits and correlation stated in the answer
Dates reviewed and missing records kept visible

Decis Ask view with an answer organized into a conclusion and the evidence behind it — Actual product UI · de-identified sample records

AI agent integration

Connect your data to the AI you already use.

Decis ships a remote MCP server and an Agent API. Paste one address into Claude or ChatGPT and your conversations become grounded in your own health, schedule, and activity data.

Supported clients

Claude · ChatGPT · Claude Code · Cursor · Decis CLI · Any MCP client

Open Decis

Read-only by design: Connected AI apps can read your data but can never modify or delete it.
You consent, and you can revoke: Each app is approved in your browser, and revoking it in Settings removes its access immediately.
80+ datasets on a stable contract: Sleep, nutrition, training, recovery, and schedule data served through a discoverable catalog and an OpenAPI contract.

Apps

Apps that go deep on one signal.

Each Works app focuses on a single health signal.

Live

FastingWorks

Fasting windows and meals, mapped to how you sleep and feel the next day. The patterns become obvious.

Open app

Coming soon

GlucoseWorks

Know which meals spike your glucose before they happen — forecasts built on your data, not population averages.

Beta

HRVWorks

Recovery capacity in context: HRV interpreted alongside sleep, stress, and training load.

Join the beta

Method

From data to decisions.

Today Decis compares your past records to help with today's choice. The more records you have, the closer they come to a model of you, and the goal is to use that model to judge a change before you make it.

01
Now
Gather
Sleep, training, meals, calendar, and AI work records on one timeline.
02
Now
Compare
How days like that differed from days that were not, with the sample size and limits shown.
03
Now
Look ahead
Find the past days that looked like today and check in Ask how the day after went.
04
Now
Try it and check
After changing a habit, compare before and after to see whether it worked for you.
05
Next
Judge it before you change it
Run the options through a model built from your own records and compare the outcomes first. This is what people call a digital twin, and it is the next step Decis is working toward.

Built on principles, not hype

Research-backed: Every feature starts from peer-reviewed evidence. We cite sources and document how research becomes product logic.
You control your data: Our products read only what you allow. Decis connects with read-only access, encrypts data in transit and at rest, and lets you disconnect a source or delete your account at any time.
Transparent method: Every answer shows the records it used, the sample size, and where the evidence is thin. No black boxes, no unexplained scores.

Company

Tab0 is a small, high-conviction team building decision intelligence for individuals — peer-reviewed research translated into product logic, answers grounded in your own records, and software we use on ourselves every day.

Dogfooding: We use our own products daily. Internal friction directly shapes what we build next.
Compounding: Each unit of work makes the next one easier. Lessons become reusable standards.
End-to-end: Own outcomes from hypothesis to shipped behavior and measured impact.

We hire rarely and deliberately.

If you work at the intersection of health science and consumer software, we'd like to hear from you.

careers@tab0.ai

See today’s wellness patterns through your own records.

Start without a credit card. The Free plan includes 25 questions every month.

Connect my records for free

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