# Silk > Silk is a private intimacy and relationship tracker for iPhone. Log moments, mood and notes, see patterns over time, and keep it all behind a PIN on your own device. Silk is an app for iPhone. App Store name: Intimacy Tracker: Silk. App Store id 6748890004: https://apps.apple.com/app/id6748890004. This website is its official site. Publisher: Drobinin Limited. Support: support@silkbetweenus.com. ## What it does - A private log for intimate wellbeing: moments, mood, notes and tags. - Calendar and pattern views, insights and correlations with cycles and wellness. - Supports one partner, several partners or solo tracking. - Tracks protection, STI tests and medications; optional Apple Health sync. - PIN protection with a calculator disguise; discreet widgets. - No account and no cloud sync; data stays on the device. - Data export. ## Pages - [Home](https://silkbetweenus.com/) - [Privacy](https://silkbetweenus.com/private/): A PIN, a calculator disguise and no cloud. - [Insights](https://silkbetweenus.com/insights/): Rhythm, mood and wellness patterns. - [Partners](https://silkbetweenus.com/partners/): Couples, open relationships, polyamory and solo. - [Logging](https://silkbetweenus.com/log/): Moments, moods and notes in a tap. - [Health](https://silkbetweenus.com/health/): Protection, STI tests, medication and cycles. - [Oura and Apple Health](https://silkbetweenus.com/does-oura-track-intimacy/): What a ring and the Health app record, and what they leave out. - [Silk and Nice](https://silkbetweenus.com/nice-alternative/): Two private trackers, compared from their own listings. - [Questions](https://silkbetweenus.com/faq/) ## Questions and answers Q: What is Silk? A: 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. Q: What happens if someone picks up my phone and taps the app? A: They see a calculator. Silk only reveals itself after you enter the PIN. If they type numbers into the calculator, they get a calculator. Q: Does Silk sync to iCloud or to my partner's phone? A: 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. Q: Does Silk work for open relationships or polyamory? A: Yes. Log per partner, aggregate, or solo mode. Pick whatever matches your setup. Q: Can I log mood or notes, not just frequency? A: Both. Each entry supports mood, notes and tags alongside the frequency log. The calendar view surfaces patterns over time. Q: Is Silk free? A: You can use Silk free with one partner, a limited history, core statistics and data export. Premium adds unlimited partners, full history, advanced insights, partner cycle tracking and widgets.