Dynamics
Create a dynamic, invite your partner, and set the terms the two of you live by. You can belong to more than one, and they stay completely separate.
For consenting adults · 18+
The agreement, kept.
Collar & Key is a private app for adults who structure their relationship deliberately. What you agreed to, what's expected today, and how it's actually going, all held in one place, by consent, for both of you.
Now on the App Store and Google Play.
What it is
A shared record instead of a scattered one.
Consensual power exchange runs on things that are easy to lose track of: what was agreed, what changed, what's due, and whether it's working. Most couples keep that in notes apps, group chats and memory.
Collar & Key gives it a structure. Both partners see the same agreement, the same expectations and the same history, and nothing binding takes effect until both of you have said yes.
Morning ritual
Evening check-in
Journal: how today felt
Press the linens
Day 142 · The Estate
Inside the app
Everything a dynamic needs to run itself.
Contracts
Write the arrangement down as clauses, then sign it, both of you. Terms are locked once signed, and any change goes through an amendment the other person has to accept. Nothing edits itself out from under you.
Today & tasks
One screen for the day: what's due, what's waiting on whom, and how you're each feeling. You decide how much each task asks, from a quiet reminder to something submitted with a photo and signed off.
Ask, command, confess
Ask permission and get a clear answer. Give a command in the moment. Own up to a broken rule. The small exchanges that make a dynamic feel lived in, not just scheduled.
Rules, rituals & rewards
Standing protocols that aren't tasks. Praise and corrections are logged rather than left implicit, and an optional points economy turns consistency into something you can spend.
Scenes
Plan a session step by step, with the gear involved and an aftercare plan, or have the app draft one for you to edit. A safeword stop isn't a failure. It ends the scene and moves straight into aftercare.
Chastity & keyholding
Locks the keyholder proposes and the wearer starts, with a timer, check-ins and, if you like, hidden time or a spin of the wheel. Emergency release is always one tap away.
Guided programs
Not sure where to begin? Follow a short program, a week at a time, on a theme like protocol, service or aftercare. Every step comes to you both to sign before it counts.
Check-ins
A regular conversation on the calendar. Answer the same questions apart, compare them together, and leave with decisions that come back next time instead of getting lost.
Journals
A shared journal for the two of you, and topics of your own, with moods, photos and video. Nothing leaves your dynamic unless you publish it.
Interests & limits
A structured list of interests, curiosities and hard limits for each partner. Compare them side by side to find the overlap, and to make the limits impossible to miss.
Community & discover
Optional and off by default. Follow other dynamics under a handle, share a ritual you're proud of, and browse member-curated books, podcasts and resources. Your private records stay private unless you publish them.
Safety & consent
Consent is the mechanism, not the marketing.
The app is built so that one person cannot quietly change the terms for the other. Agreements need two signatures. Amendments need acceptance. Keyholding switches on only when both of you agree to it, and a lock starts only when the wearer starts it.
Your safeword is a setting in the dynamic, not a detail buried in a document, and stopping is treated as a normal, blameless outcome everywhere it appears. Either partner can pause the dynamic at any time, which suspends expectations, and any lock, rather than marking them failed. Emergency release from a lock is always there, even offline.
Privacy
What you write here is nobody else's business.
Between the two of you
What's in your dynamic is seen by you and your partner and nobody else. Private journal topics stay yours alone, and nothing reaches the community unless you both decide to take part.
Separate from everyone else's
Your account can only ever open your own information and the dynamics you belong to. Nobody else's account can reach it.
Discreet on your phone
Lock the app behind Face ID or your fingerprint, and keep what a notification says off your lock screen.
Not for sale
We don't sell your personal information, and we don't use what you write to target advertising at you. There is no advertising in the app.
Yours to remove
Delete individual pieces of content, or delete your whole account. Both can be done from inside the app, or from our account deletion page.
Our goal
Take this seriously, so the people using it can too.
Consensual power exchange is a real relationship structure practiced by a lot of ordinary adults, and the tools available to them are mostly improvised. We think it deserves software built with the same care as anything else people organize their lives around.
That means being explicit about consent, careful with sensitive data, and honest about what the app is: an organizer for a relationship two adults have already chosen. It is not a place to meet people, and not a place for explicit content.
Free resources
Start on paper if you like
Printable templates and short guides for the conversations every dynamic needs, free and with no sign-up.