diff --git a/feature/addlink/src/main/java/com/strayalpaca/addlink/AddLinkScreen.kt b/feature/addlink/src/main/java/com/strayalpaca/addlink/AddLinkScreen.kt
index 16249455..f08baec8 100644
--- a/feature/addlink/src/main/java/com/strayalpaca/addlink/AddLinkScreen.kt
+++ b/feature/addlink/src/main/java/com/strayalpaca/addlink/AddLinkScreen.kt
@@ -273,17 +273,31 @@ fun AddLinkScreen(
                         text = memo,
                         hintText = stringResource(id = R.string.placeholder_memo),
                         onChangeText = inputMemo,
-                        enable = enable
+                        enable = enable,
+                        isError = memo.length >= 100
                     )
 
                     Spacer(modifier = Modifier.height(4.dp))
 
-                    Text(
-                        modifier = Modifier.fillMaxWidth(),
-                        text = "${memo.length}/100",
-                        style = PokitTheme.typography.detail1.copy(color = PokitTheme.colors.textTertiary),
-                        textAlign = TextAlign.End
-                    )
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        if (memo.length >= 100) {
+                            Text(
+                                color = PokitTheme.colors.error,
+                                text = "최대 100자까지 입력 가능합니다.",
+                                style = PokitTheme.typography.detail1
+                            )
+                        }
+
+                        Spacer(modifier = Modifier.weight(1f))
+
+                        Text(
+                            color = if (memo.length >= 100) PokitTheme.colors.error else PokitTheme.colors.textTertiary,
+                            modifier = Modifier.weight(1f),
+                            text = "${memo.length}/100",
+                            style = PokitTheme.typography.detail1,
+                            textAlign = TextAlign.End
+                        )
+                    }
 
                     Spacer(modifier = Modifier.height(24.dp))
 
diff --git a/feature/addlink/src/main/java/com/strayalpaca/addlink/AddLinkViewModel.kt b/feature/addlink/src/main/java/com/strayalpaca/addlink/AddLinkViewModel.kt
index 3ef65cd4..84b04a4e 100644
--- a/feature/addlink/src/main/java/com/strayalpaca/addlink/AddLinkViewModel.kt
+++ b/feature/addlink/src/main/java/com/strayalpaca/addlink/AddLinkViewModel.kt
@@ -177,7 +177,9 @@ class AddLinkViewModel @Inject constructor(
     }
 
     fun inputMemo(memo: String) {
-        _memo.update { memo }
+        if (memo.length <= 100) {
+            _memo.update { memo }
+        }
     }
 
     fun showSelectPokitBottomSheet() = intent {
diff --git a/feature/home/src/main/java/pokitmons/pokit/home/pokit/PokitScreen.kt b/feature/home/src/main/java/pokitmons/pokit/home/pokit/PokitScreen.kt
index 5af92453..da716fc9 100644
--- a/feature/home/src/main/java/pokitmons/pokit/home/pokit/PokitScreen.kt
+++ b/feature/home/src/main/java/pokitmons/pokit/home/pokit/PokitScreen.kt
@@ -1,5 +1,7 @@
 package pokitmons.pokit.home.pokit
 
+import android.content.Context
+import android.widget.Toast
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
@@ -15,6 +17,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import coil.compose.rememberAsyncImagePainter
@@ -47,6 +50,8 @@ fun PokitScreen(
     val pokitOptionBottomSheetType by viewModel.pokitOptionBottomSheetType.collectAsState()
     val currentDetailSelectedCategory by viewModel.currentDetailSelectedCategory.collectAsState()
 
+    val context: Context = LocalContext.current
+
     PokitBottomSheet(
         onHideBottomSheet = viewModel::hidePokitDetailRemoveBottomSheet,
         show = pokitOptionBottomSheetType != null
@@ -54,6 +59,7 @@ fun PokitScreen(
         when (pokitOptionBottomSheetType) {
             BottomSheetType.MODIFY -> {
                 ModifyBottomSheetContent(
+                    onClickShare = { Toast.makeText(context, "준비중입니다.", Toast.LENGTH_SHORT).show() },
                     onClickModify = remember {
                         {
                             viewModel.hidePokitDetailRemoveBottomSheet()
diff --git a/feature/home/src/main/java/pokitmons/pokit/home/pokit/UnclassifiedScreen.kt b/feature/home/src/main/java/pokitmons/pokit/home/pokit/UnclassifiedScreen.kt
index 6a780f86..011e44cc 100644
--- a/feature/home/src/main/java/pokitmons/pokit/home/pokit/UnclassifiedScreen.kt
+++ b/feature/home/src/main/java/pokitmons/pokit/home/pokit/UnclassifiedScreen.kt
@@ -1,5 +1,8 @@
 package pokitmons.pokit.home.pokit
 
+import android.content.Context
+import android.content.Intent
+import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.lazy.LazyColumn
@@ -9,6 +12,7 @@ import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
@@ -33,6 +37,8 @@ fun UnclassifiedScreen(
     val currentSelectedLink by viewModel.currentSelectedLink.collectAsState()
     val currentDetailShowLink by viewModel.currentDetailShowLink.collectAsState()
 
+    val context: Context = LocalContext.current
+
     currentDetailShowLink?.let { link ->
         LinkDetailBottomSheet(
             title = link.title,
@@ -45,6 +51,13 @@ fun UnclassifiedScreen(
             dateString = link.dateString,
             onHideBottomSheet = viewModel::hideDetailLinkBottomSheet,
             show = true,
+            onClickShareLink = {
+                val intent = Intent(Intent.ACTION_SEND_MULTIPLE).apply {
+                    type = "text/plain"
+                    putExtra(Intent.EXTRA_TEXT, link.url)
+                }
+                context.startActivity(Intent.createChooser(intent, "Pokit"))
+            },
             onClickBookmark = viewModel::toggleBookmark
         )
     }
@@ -56,6 +69,7 @@ fun UnclassifiedScreen(
         when (pokitOptionBottomSheetType) {
             BottomSheetType.MODIFY -> {
                 ModifyBottomSheetContent(
+                    onClickShare = { Toast.makeText(context, "준비중입니다.", Toast.LENGTH_SHORT).show() },
                     onClickModify = remember {
                         {
                             viewModel.hideLinkOptionBottomSheet()
diff --git a/feature/home/src/main/java/pokitmons/pokit/home/remind/RemindScreen.kt b/feature/home/src/main/java/pokitmons/pokit/home/remind/RemindScreen.kt
index 6b900077..04973cb2 100644
--- a/feature/home/src/main/java/pokitmons/pokit/home/remind/RemindScreen.kt
+++ b/feature/home/src/main/java/pokitmons/pokit/home/remind/RemindScreen.kt
@@ -1,5 +1,7 @@
 package pokitmons.pokit.home.remind
 
+import android.content.Context
+import android.widget.Toast
 import androidx.compose.foundation.horizontalScroll
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
@@ -17,6 +19,7 @@ import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
@@ -54,6 +57,8 @@ fun RemindScreen(
     val pokitOptionBottomSheetType by viewModel.pokitOptionBottomSheetType.collectAsState()
     val currentSelectedLink by viewModel.currentSelectedLink.collectAsState()
 
+    val context: Context = LocalContext.current
+
     val showTotalEmpty by remember {
         derivedStateOf {
             todayContentsState == NetworkState.IDLE &&
@@ -70,6 +75,7 @@ fun RemindScreen(
         when (pokitOptionBottomSheetType) {
             BottomSheetType.MODIFY -> {
                 ModifyBottomSheetContent(
+                    onClickShare = { Toast.makeText(context, "준비중입니다.", Toast.LENGTH_SHORT).show() },
                     onClickModify = remember {
                         {
                             viewModel.hideLinkOptionBottomSheet()
diff --git a/feature/login/src/main/java/pokitmons/pokit/nickname/InputNicknameScreen.kt b/feature/login/src/main/java/pokitmons/pokit/nickname/InputNicknameScreen.kt
index ce096374..f3173f75 100644
--- a/feature/login/src/main/java/pokitmons/pokit/nickname/InputNicknameScreen.kt
+++ b/feature/login/src/main/java/pokitmons/pokit/nickname/InputNicknameScreen.kt
@@ -67,11 +67,11 @@ fun InputNicknameScreen(
                 maxLength = NICKNAME_MAX_LENGTH,
                 sub = when {
                     inputNicknameState.isDuplicate -> stringResource(id = Login.string.nickname_already_in_use)
-                    inputNicknameState.isRegex -> stringResource(id = Login.string.input_restriction_message)
-                    inputNicknameState.nickname.length < NICKNAME_MAX_LENGTH -> stringResource(id = Login.string.input_max_length)
+                    !inputNicknameState.isRegex -> stringResource(id = Login.string.input_restriction_message)
+                    inputNicknameState.nickname.length >= NICKNAME_MAX_LENGTH -> stringResource(id = Login.string.input_max_length)
                     else -> ""
                 },
-                isError = inputNicknameState.nickname.length > NICKNAME_MAX_LENGTH || inputNicknameState.isDuplicate || inputNicknameState.isRegex,
+                isError = inputNicknameState.isRegex || inputNicknameState.isDuplicate || inputNicknameState.nickname.length >= NICKNAME_MAX_LENGTH,
                 hintText = stringResource(id = Login.string.input_nickname_hint),
                 onChangeText = { text ->
                     Log.d("!! : ", text)
@@ -79,9 +79,7 @@ fun InputNicknameScreen(
                         viewModel.apply {
                             inputText(text)
                             if (checkNicknameRegex(text)) {
-                                Log.d("!! : ", "else call")
                                 checkDuplicateNickname(text)
-                            } else {
                             }
                         }
                     }
diff --git a/feature/pokitdetail/src/main/java/com/strayalpaca/pokitdetail/PokitDetailScreen.kt b/feature/pokitdetail/src/main/java/com/strayalpaca/pokitdetail/PokitDetailScreen.kt
index eef10b24..1dd8c7df 100644
--- a/feature/pokitdetail/src/main/java/com/strayalpaca/pokitdetail/PokitDetailScreen.kt
+++ b/feature/pokitdetail/src/main/java/com/strayalpaca/pokitdetail/PokitDetailScreen.kt
@@ -1,5 +1,8 @@
 package com.strayalpaca.pokitdetail
 
+import android.content.Context
+import android.content.Intent
+import android.widget.Toast
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -17,6 +20,7 @@ import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import coil.compose.rememberAsyncImagePainter
@@ -215,6 +219,7 @@ fun PokitDetailScreen(
         }
 
         if (state.currentLink != null) {
+            val context: Context = LocalContext.current
             LinkDetailBottomSheet(
                 title = state.currentLink.title,
                 memo = state.currentLink.memo,
@@ -226,6 +231,13 @@ fun PokitDetailScreen(
                 dateString = state.currentLink.dateString,
                 onHideBottomSheet = hideLinkDetailBottomSheet,
                 show = state.linkDetailBottomSheetVisible,
+                onClickShareLink = {
+                    val intent = Intent(Intent.ACTION_SEND_MULTIPLE).apply {
+                        type = "text/plain"
+                        putExtra(Intent.EXTRA_TEXT, state.currentLink.url)
+                    }
+                    context.startActivity(Intent.createChooser(intent, "Pokit"))
+                },
                 onClickBookmark = onClickBookmark
             )
         }
@@ -282,9 +294,11 @@ fun PokitDetailScreen(
             onHideBottomSheet = hideLinkModifyBottomSheet,
             show = state.linkBottomSheetType != null
         ) {
+            val context: Context = LocalContext.current
             when (state.linkBottomSheetType) {
                 BottomSheetType.MODIFY -> {
                     ModifyBottomSheetContent(
+                        onClickShare = { Toast.makeText(context, "준비중입니다.", Toast.LENGTH_SHORT).show() },
                         onClickModify = remember {
                             {
                                 state.currentLink?.let { link ->
@@ -319,7 +333,9 @@ fun PokitDetailScreen(
         ) {
             when (state.pokitBottomSheetType) {
                 BottomSheetType.MODIFY -> {
+                    val context: Context = LocalContext.current
                     ModifyBottomSheetContent(
+                        onClickShare = { Toast.makeText(context, "준비중입니다.", Toast.LENGTH_SHORT).show() },
                         onClickModify = remember {
                             {
                                 hidePokitModifyBottomSheet()
diff --git a/feature/search/src/main/java/pokitmons/pokit/search/SearchScreen.kt b/feature/search/src/main/java/pokitmons/pokit/search/SearchScreen.kt
index 8063935c..cebf33dc 100644
--- a/feature/search/src/main/java/pokitmons/pokit/search/SearchScreen.kt
+++ b/feature/search/src/main/java/pokitmons/pokit/search/SearchScreen.kt
@@ -1,5 +1,7 @@
 package pokitmons.pokit.search
 
+import android.content.Context
+import android.content.Intent
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
@@ -10,6 +12,7 @@ import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import coil.compose.rememberAsyncImagePainter
@@ -48,6 +51,8 @@ fun SearchScreenContainer(
     val pokitList by viewModel.pokitList.collectAsState()
     val pokitPagingState by viewModel.pokitPagingState.collectAsState()
 
+    val context: Context = LocalContext.current
+
     state.currentLink?.let { link ->
         LinkDetailBottomSheet(
             title = link.title,
@@ -60,6 +65,13 @@ fun SearchScreenContainer(
             dateString = link.dateString,
             onHideBottomSheet = viewModel::hideLinkDetailBottomSheet,
             show = state.showLinkDetailBottomSheet,
+            onClickShareLink = {
+                val intent = Intent(Intent.ACTION_SEND_MULTIPLE).apply {
+                    type = "text/plain"
+                    putExtra(Intent.EXTRA_TEXT, state.currentLink?.url)
+                }
+                context.startActivity(Intent.createChooser(intent, "Pokit"))
+            },
             onClickModifyLink = {
                 viewModel.hideLinkDetailBottomSheet()
                 onNavigateToLinkModify(link.id)