diff --git a/assets/images/germ_logo.webp b/assets/images/germ_logo.webp
new file mode 100644
index 0000000000..a85048381a
Binary files /dev/null and b/assets/images/germ_logo.webp differ
diff --git a/src/analytics/metrics/types.ts b/src/analytics/metrics/types.ts
index 97b7fcfe09..65f2a5d39f 100644
--- a/src/analytics/metrics/types.ts
+++ b/src/analytics/metrics/types.ts
@@ -875,4 +875,9 @@ export type Events = {
   'liveEvents:unhideAllFeedBanners': {
     context: LiveEventFeedMetricContext
   }
+
+  'profile:associated:germ:click-to-chat': {}
+  'profile:associated:germ:click-self-info': {}
+  'profile:associated:germ:self-disconnect': {}
+  'profile:associated:germ:self-reconnect': {}
 }
diff --git a/src/components/dialogs/LinkWarning.tsx b/src/components/dialogs/LinkWarning.tsx
index 74be78f9d3..181d411ce4 100644
--- a/src/components/dialogs/LinkWarning.tsx
+++ b/src/components/dialogs/LinkWarning.tsx
@@ -22,12 +22,27 @@ export function LinkWarningDialog() {
       webOptions={{alignCenter: true}}
       onClose={linkWarningDialogControl.clear}>
       <Dialog.Handle />
-      <InAppBrowserConsentInner link={linkWarningDialogControl.value} />
+      <LinkWarningDialogInner link={linkWarningDialogControl.value} />
     </Dialog.Outer>
   )
 }
 
-function InAppBrowserConsentInner({
+export function CustomLinkWarningDialog({
+  control,
+  link,
+}: {
+  control: Dialog.DialogControlProps
+  link?: {href: string; displayText: string; share?: boolean}
+}) {
+  return (
+    <Dialog.Outer control={control} nativeOptions={{preventExpansion: true}}>
+      <Dialog.Handle />
+      <LinkWarningDialogInner link={link} />
+    </Dialog.Outer>
+  )
+}
+
+function LinkWarningDialogInner({
   link,
 }: {
   link?: {href: string; displayText: string; share?: boolean}
diff --git a/src/screens/Profile/Header/ProfileHeaderStandard.tsx b/src/screens/Profile/Header/ProfileHeaderStandard.tsx
index 6467756d4e..c60fcd032a 100644
--- a/src/screens/Profile/Header/ProfileHeaderStandard.tsx
+++ b/src/screens/Profile/Header/ProfileHeaderStandard.tsx
@@ -39,6 +39,7 @@ import * as Toast from '#/components/Toast'
 import {Text} from '#/components/Typography'
 import {VerificationCheckButton} from '#/components/verification/VerificationCheckButton'
 import {IS_IOS} from '#/env'
+import {GermButton} from '../components/GermButton'
 import {EditProfileDialog} from './EditProfileDialog'
 import {ProfileHeaderHandle} from './Handle'
 import {ProfileHeaderMetrics} from './Metrics'
@@ -163,6 +164,10 @@ let ProfileHeaderStandard = ({
                 </View>
               ) : undefined}
 
+              {profile.associated?.germ && (
+                <GermButton germ={profile.associated.germ} profile={profile} />
+              )}
+
               {!isMe &&
                 !isBlockedUser &&
                 shouldShowKnownFollowers(profile.viewer?.knownFollowers) && (
diff --git a/src/screens/Profile/components/GermButton.tsx b/src/screens/Profile/components/GermButton.tsx
new file mode 100644
index 0000000000..c5af7d536e
--- /dev/null
+++ b/src/screens/Profile/components/GermButton.tsx
@@ -0,0 +1,334 @@
+import {Platform, View} from 'react-native'
+import {Image} from 'expo-image'
+import {
+  type AppBskyActorDefs,
+  type AppBskyActorGetProfile,
+  type AtpAgent,
+} from '@atproto/api'
+import {msg, Trans} from '@lingui/macro'
+import {useLingui} from '@lingui/react'
+import {useMutation, useQueryClient} from '@tanstack/react-query'
+
+import {until} from '#/lib/async/until'
+import {isNetworkError} from '#/lib/strings/errors'
+import {RQKEY} from '#/state/queries/profile'
+import {useAgent, useSession} from '#/state/session'
+import {atoms as a, useTheme, web} from '#/alf'
+import {Button, ButtonIcon, ButtonText} from '#/components/Button'
+import * as Dialog from '#/components/Dialog'
+import {CustomLinkWarningDialog} from '#/components/dialogs/LinkWarning'
+import {ArrowTopRight_Stroke2_Corner0_Rounded as ArrowTopRightIcon} from '#/components/icons/Arrow'
+import {Link} from '#/components/Link'
+import {Loader} from '#/components/Loader'
+import * as Toast from '#/components/Toast'
+import {Text} from '#/components/Typography'
+import {useAnalytics} from '#/analytics'
+import type * as bsky from '#/types/bsky'
+
+export function GermButton({
+  germ,
+  profile,
+}: {
+  germ: AppBskyActorDefs.ProfileAssociatedGerm
+  profile: bsky.profile.AnyProfileView
+}) {
+  const t = useTheme()
+  const ax = useAnalytics()
+  const {_} = useLingui()
+  const {currentAccount} = useSession()
+  const linkWarningControl = Dialog.useDialogControl()
+
+  // exclude `none` and all unknown values
+  if (
+    !(germ.showButtonTo === 'everyone' || germ.showButtonTo === 'usersIFollow')
+  ) {
+    return null
+  }
+
+  if (currentAccount?.did === profile.did) {
+    return <GermSelfButton did={currentAccount.did} />
+  }
+
+  if (germ.showButtonTo === 'usersIFollow' && !profile.viewer?.followedBy) {
+    return null
+  }
+
+  const url = constructGermUrl(germ, profile, currentAccount?.did)
+
+  if (!url) {
+    return null
+  }
+
+  return (
+    <>
+      <Link
+        to={url}
+        onPress={evt => {
+          ax.metric('profile:associated:germ:click-to-chat', {})
+          if (isCustomGermDomain(url)) {
+            evt.preventDefault()
+            linkWarningControl.open()
+            return false
+          }
+        }}
+        label={_(msg`Open Germ DM`)}
+        overridePresentation={false}
+        shouldProxy={false}
+        style={[
+          t.atoms.bg_contrast_50,
+          a.rounded_full,
+          a.self_start,
+          {padding: 6},
+        ]}>
+        <GermLogo size="small" />
+        <Text style={[a.text_sm, a.font_medium, a.ml_xs]}>
+          <Trans>Germ DM</Trans>
+        </Text>
+        <ArrowTopRightIcon style={[t.atoms.text, a.mx_2xs]} width={14} />
+      </Link>
+      <CustomLinkWarningDialog
+        control={linkWarningControl}
+        link={{
+          href: url,
+          displayText: '',
+          share: false,
+        }}
+      />
+    </>
+  )
+}
+
+function GermLogo({size}: {size: 'small' | 'large'}) {
+  return (
+    <Image
+      source={require('../../../../assets/images/germ_logo.webp')}
+      accessibilityIgnoresInvertColors={false}
+      contentFit="cover"
+      style={[
+        a.rounded_full,
+        size === 'large' ? {width: 32, height: 32} : {width: 16, height: 16},
+      ]}
+    />
+  )
+}
+
+function GermSelfButton({did}: {did: string}) {
+  const t = useTheme()
+  const ax = useAnalytics()
+  const {_} = useLingui()
+  const selfExplanationDialogControl = Dialog.useDialogControl()
+  const agent = useAgent()
+  const queryClient = useQueryClient()
+
+  const {mutate: deleteDeclaration, isPending} = useMutation({
+    mutationFn: async () => {
+      const previousRecord = await agent.com.germnetwork.declaration
+        .get({
+          repo: did,
+          rkey: 'self',
+        })
+        .then(res => res.value)
+        .catch(() => null)
+
+      await agent.com.germnetwork.declaration.delete({
+        repo: did,
+        rkey: 'self',
+      })
+
+      await whenAppViewReady(agent, did, res => !res.data.associated?.germ)
+
+      return previousRecord
+    },
+    onSuccess: previousRecord => {
+      ax.metric('profile:associated:germ:self-disconnect', {})
+
+      async function undo() {
+        if (!previousRecord) return
+        try {
+          await agent.com.germnetwork.declaration.put(
+            {
+              repo: did,
+              rkey: 'self',
+            },
+            previousRecord,
+          )
+          await whenAppViewReady(agent, did, res => !!res.data.associated?.germ)
+          await queryClient.refetchQueries({queryKey: RQKEY(did)})
+
+          Toast.show(_(msg`Germ DM reconnected`))
+          ax.metric('profile:associated:germ:self-reconnect', {})
+        } catch (e: any) {
+          Toast.show(
+            _(msg`Failed to reconnect Germ DM. Error: ${e?.message}`),
+            {
+              type: 'error',
+            },
+          )
+          if (!isNetworkError(e)) {
+            ax.logger.error('Failed to reconnect Germ DM link', {
+              safeMessage: e,
+            })
+          }
+        }
+      }
+
+      selfExplanationDialogControl.close(() => {
+        void queryClient.refetchQueries({queryKey: RQKEY(did)})
+        Toast.show(
+          <Toast.Outer>
+            <Toast.Icon />
+            <Toast.Text>
+              <Trans>Germ DM disconnected</Trans>
+            </Toast.Text>
+            {previousRecord && (
+              <Toast.Action label={_(msg`Undo`)} onPress={() => void undo()}>
+                <Trans>Undo</Trans>
+              </Toast.Action>
+            )}
+          </Toast.Outer>,
+        )
+      })
+    },
+    onError: error => {
+      Toast.show(
+        _(msg`Failed to disconnect Germ DM. Error: ${error?.message}`),
+        {
+          type: 'error',
+        },
+      )
+      if (!isNetworkError(error)) {
+        ax.logger.error('Failed to disconnect Germ DM link', {
+          safeMessage: error,
+        })
+      }
+    },
+  })
+
+  return (
+    <>
+      <Button
+        label={_(msg`Learn more about your Germ DM link`)}
+        onPress={() => {
+          ax.metric('profile:associated:germ:click-self-info', {})
+          selfExplanationDialogControl.open()
+        }}
+        style={[
+          t.atoms.bg_contrast_50,
+          a.rounded_full,
+          a.self_start,
+          {padding: 6, paddingRight: 10},
+        ]}>
+        <GermLogo size="small" />
+        <Text style={[a.text_sm, a.font_medium, a.ml_xs]}>
+          <Trans>Germ DM</Trans>
+        </Text>
+      </Button>
+
+      <Dialog.Outer
+        control={selfExplanationDialogControl}
+        nativeOptions={{preventExpansion: true}}>
+        <Dialog.Handle />
+        <Dialog.ScrollableInner
+          label={_(msg`Germ DM Link`)}
+          style={web([{maxWidth: 400, borderRadius: 36}])}>
+          <View style={[a.flex_row, a.align_center, {gap: 6}]}>
+            <GermLogo size="large" />
+            <Text style={[a.text_2xl, a.font_bold]}>
+              <Trans>Germ DM Link</Trans>
+            </Text>
+          </View>
+
+          <Text style={[a.text_md, a.leading_snug, a.mt_sm]}>
+            <Trans>
+              This button lets others open the Germ DM app to send you a
+              message. You can manage its visibility from the Germ DM app, or
+              you can disconnect your Bluesky account from Germ DM altogether by
+              clicking the button below.
+            </Trans>
+          </Text>
+          <View style={[a.mt_2xl, a.gap_md]}>
+            <Button
+              label={_(msg`Got it`)}
+              size="large"
+              color="primary"
+              onPress={() => selfExplanationDialogControl.close()}>
+              <ButtonText>
+                <Trans>Got it</Trans>
+              </ButtonText>
+            </Button>
+            <Button
+              label={_(msg`Disconnect Germ DM`)}
+              size="large"
+              color="secondary"
+              onPress={() => deleteDeclaration()}
+              disabled={isPending}>
+              {isPending && <ButtonIcon icon={Loader} />}
+              <ButtonText>
+                <Trans>Disconnect Germ DM</Trans>
+              </ButtonText>
+            </Button>
+          </View>
+        </Dialog.ScrollableInner>
+      </Dialog.Outer>
+    </>
+  )
+}
+
+function constructGermUrl(
+  declaration: AppBskyActorDefs.ProfileAssociatedGerm,
+  profile: bsky.profile.AnyProfileView,
+  viewerDid?: string,
+) {
+  try {
+    const urlp = new URL(declaration.messageMeUrl)
+
+    if (urlp.pathname.endsWith('/')) {
+      urlp.pathname = urlp.pathname.slice(0, -1)
+    }
+
+    urlp.pathname += `/${platform()}`
+
+    if (viewerDid) {
+      urlp.hash = `#${profile.did}+${viewerDid}`
+    } else {
+      urlp.hash = `#${profile.did}`
+    }
+
+    return urlp.toString()
+  } catch {
+    return null
+  }
+}
+
+function isCustomGermDomain(url: string) {
+  try {
+    const urlp = new URL(url)
+    return urlp.hostname !== 'landing.ger.mx'
+  } catch {
+    return false
+  }
+}
+
+function platform() {
+  switch (Platform.OS) {
+    case 'ios':
+      return 'iOS'
+    case 'android':
+      return 'android'
+    default:
+      return 'web'
+  }
+}
+
+async function whenAppViewReady(
+  agent: AtpAgent,
+  actor: string,
+  fn: (res: AppBskyActorGetProfile.Response) => boolean,
+) {
+  await until(
+    5, // 5 tries
+    1e3, // 1s delay between tries
+    fn,
+    () => agent.app.bsky.actor.getProfile({actor}),
+  )
+}
diff --git a/src/state/session/index.tsx b/src/state/session/index.tsx
index 4a70fc4c09..e63e180a4e 100644
--- a/src/state/session/index.tsx
+++ b/src/state/session/index.tsx
@@ -430,7 +430,7 @@ export function useRequireAuth() {
   const {signinDialogControl} = useGlobalDialogsControlContext()
 
   return useCallback(
-    (fn: () => void) => {
+    (fn: () => unknown) => {
       if (hasSession) {
         fn()
       } else {