A private, on-device second brain

Your thoughts, quietly arranged into what matters today.

Capture a thought — type or speak — and tideline pulls out the decisions, open questions, and tasks inside it. Each day, it shows the few things actually waiting on you.

Coming soonDownload on the App Store

Processed on your device · iPhone · iOS 26


How it works

Three calm beats, and the noise is gone.

1

Say it or type it.

One field, one thumb. The point is to get the thought out of your head — a half-formed plan, a worry, a promise you made. tideline handles the rest.

2

It surfaces what's inside.

The on-device model reads what you captured and offers the decisions, open questions, and tasks it found — each marked with how sure it is. You keep what's real and prune the rest in seconds.

3

What's waiting on you today.

Open the app to a short, true list — and a quiet read on your day in a calm, human voice. Tension and relief held together: what's unresolved, and what's already settled.

The trust system

Trust you can see.

The AI sometimes reaches too far. So tideline never hides its uncertainty — every item wears how sure it is, and where it came from.

Confidence, as a tide mark

Not a red alert — a calm line. Solid when it's sure, dashed when it's inferring, dotted when it's only a guess.

Confirmed
The AI is sure
Inferred
Probable, worth a glance
Possible
A guess — visibly tentative

Provenance, one tap away

Every item answers one question: why is this here? The exact words you said, and where they came from.

Why is this here?

"…let's just put down the deposit on the Folsom place before Friday."

Voice memo · Tue 9:14 AM

Processed on your device. Connected sources are pulled straight to your phone — your thoughts never touch our servers.

Sources

It meets your life where it already is.

Pull context from your recorders, calendar, chats, tasks, and notes. On-device stays on-device; connected-cloud sources are always marked. Power users can bring their own.

RecordersVoice memos, pocket recorders On-device
CalendarToday's agenda, meeting prep On-device
Chat & tasksSlack, Linear, Reminders Connected
Bring your own connectorPaste an MCP endpoint + key MCP

Pricing

Simple, honest pricing.

Capture, extraction, and your ledger are free forever. You pay only where connectors and Currents carry real running costs.

Monthly
$6.99 /mo

Everything, month to month. Cancel anytime.

Choose monthly
Lifetime
$199.99 once

Pay once, keep it for good. For people who plan to stay.

Buy lifetime

Questions

A few things people ask.

Is my data really private?

Yes. Capture and extraction run on your device with Apple Intelligence. Connected sources are pulled directly from the service to your phone — our infrastructure is never in the data path.

Does it work offline?

Capturing, transcribing, and organizing all work with no connection. Cloud connectors sync when you're back online.

Which devices are supported?

iPhone with Apple Intelligence — iPhone 15 Pro and newer — running iOS 26 or later. An iPad build is on the way.

Is there a free version?

Capture, extraction, and the ledger built from your own voice and typing are free forever. A subscription unlocks cloud connectors and Currents.

Let the day's noise recede. Keep what's true.

tideline is coming to the App Store. Quiet, private, and yours.

Coming soonDownload on the App Store