Silk
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Silk

The health metric your phone doesn't track

Download Silk on the App Store

Free to use
with one partner.

Read the story Apple's Problem with Bodies I shipped a wellbeing journal and discovered the App Store still isn't sure whether the human body is health, lifestyle, or sin.
Silk's calendar for the month, with hearts on days that have moments and the selected day's entry below The insights hub with moments, satisfaction and protection figures, and cards for rhythm, mood and wellness, activities and people Insights summary: your month, with sessions, satisfaction and protection, and a wellness score Add Moment: choose what happened, who with, when and the mood Time patterns: a weekly rhythm chart by day of the week and all-time totals A day in the calendar with two entries, a date night and a massage

A private log for intimate wellbeing

Apple Health tracks sleep, steps and heart rate, and draws a line somewhere before intimate wellbeing. Silk fills that gap: frequency, mood, notes and trends over time, kept behind a PIN on your own phone.

Silk's calendar for the month, with hearts on days that have moments and the selected day's entry below

The month at a glance

Days with moments carry a heart. Tap a day to see what you logged: when, how long, the mood and the tags.

Logging moments

The insights hub with moments, satisfaction and protection figures, and cards for rhythm, mood and wellness, activities and people

Notice your own patterns

Silk shows your rhythm across the week, satisfaction over time, and how wellness and intimacy move together.

Insights and patterns

Privacy and security settings: require PIN, app icon, sync with Apple Health and data management

It looks like a calculator

Anyone who opens Silk without the PIN gets a working calculator. The widgets pass for a habit tracker.

Privacy in Silk

What Silk covers

PrivacyA PIN, a calculator disguise and no cloud. InsightsRhythm, mood and wellness patterns. PartnersCouples, open relationships, polyamory and solo. LoggingMoments, moods and notes in a tap. HealthProtection, STI tests, medication and cycles. Oura and Apple HealthWhat a ring and the Health app record, and what they leave out. Silk and NiceTwo private trackers, compared from their own listings.

Questions

What is Silk?

Silk is a private log for intimate wellbeing. You record moments, mood and notes, and it shows patterns over time. Everything stays on your iPhone behind a PIN.

What happens if someone picks up my phone and taps the app?

They see a calculator. Silk only reveals itself after you enter the PIN. If they type numbers into the calculator, they get a calculator.

Does Silk sync to iCloud or to my partner's phone?

No. Nothing syncs to us or to a partner. There are no accounts and no cloud backup. The data stays on the device you logged it on.

Does Silk work for open relationships or polyamory?

Yes. Log per partner, aggregate, or solo mode. Pick whatever matches your setup.

All questions

A private log for intimate wellbeing

Silk is on the App Store, for iPhone.

Download Silk on the App Store