diff --git a/src/main/kotlin/com/vmaier/marvel/snap/cards/controller/CardsController.kt b/src/main/kotlin/com/vmaier/marvel/snap/cards/controller/CardsController.kt
index 0d0cc6f..14c67ca 100644
--- a/src/main/kotlin/com/vmaier/marvel/snap/cards/controller/CardsController.kt
+++ b/src/main/kotlin/com/vmaier/marvel/snap/cards/controller/CardsController.kt
@@ -5,6 +5,7 @@ import com.vmaier.marvel.snap.cards.db.dao.Card
 import com.vmaier.marvel.snap.cards.dto.CreateCardDTO
 import com.vmaier.marvel.snap.cards.service.CardsService
 import org.springframework.data.domain.PageRequest
+import org.springframework.data.domain.Sort
 import org.springframework.stereotype.Controller
 import org.springframework.ui.Model
 import org.springframework.web.bind.annotation.*
@@ -25,7 +26,7 @@ class CardsController constructor(private val cardsService: CardsService) {
         if (pageSize > Constants.MAX_PAGE_SIZE) {
             pageSize = Constants.MAX_PAGE_SIZE
         }
-        val cardPage = cardsService.getAllCardsByKeyword(PageRequest.of(currentPage - 1, pageSize), keyword)
+        val cardPage = cardsService.getAllCardsByKeyword(PageRequest.of(currentPage - 1, pageSize, Sort.by("name").ascending()), keyword)
         model.addAttribute("keyword", keyword)
         model.addAttribute("cardPage", cardPage)
         return "cards"
@@ -36,14 +37,16 @@ class CardsController constructor(private val cardsService: CardsService) {
         model: Model,
         @RequestParam(value = "keyword", required = false) keyword: String?,
         @RequestParam(value = "cost", required = false) cost: Int?,
-        @RequestParam(value = "power", required = false) power: Int?
+        @RequestParam(value = "power", required = false) power: Int?,
+        @RequestParam(value = "isOwned", required = false) isOwned: Boolean?,
     ): String {
-        val cards = cardsService.getAllCardsByKeyword(keyword, cost, power)
+        val cards = cardsService.getAllCardsByKeyword(keyword, cost, power, isOwned).sortedBy { card -> card.name }
         val costValues = cards.map { card: Card -> card.cost }.toSet().sorted()
         val powerValues = cards.map { card: Card -> card.power }.toSet().sorted()
         model.addAttribute("keyword", keyword)
         model.addAttribute("cost", cost)
         model.addAttribute("power", power)
+        model.addAttribute("isOwned", isOwned)
         model.addAttribute("costValues", costValues)
         model.addAttribute("powerValues", powerValues)
         model.addAttribute("cards", cards)
@@ -72,6 +75,6 @@ class CardsController constructor(private val cardsService: CardsService) {
     @DeleteMapping("cards")
     fun removeCards(model: Model): String {
         cardsService.removeAllCards()
-        return "redirect:/cards"
+        return "redirect:/card-grid"
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/com/vmaier/marvel/snap/cards/controller/api/CardsApiController.kt b/src/main/kotlin/com/vmaier/marvel/snap/cards/controller/api/CardsApiController.kt
index 6de40fc..1a80f0a 100644
--- a/src/main/kotlin/com/vmaier/marvel/snap/cards/controller/api/CardsApiController.kt
+++ b/src/main/kotlin/com/vmaier/marvel/snap/cards/controller/api/CardsApiController.kt
@@ -50,4 +50,16 @@ class CardsApiController constructor(private val cardsService: CardsService) : C
         cardsService.removeAllCards()
         return ResponseEntity(HttpStatus.NO_CONTENT)
     }
+
+    override fun addToCollection(cardId: Int): ResponseEntity<Void> {
+        Validator.checkIfCardIdIsValid(cardId)
+        cardsService.addToCollection(cardId)
+        return ResponseEntity(HttpStatus.NO_CONTENT)
+    }
+
+    override fun removeFromCollection(cardId: Int): ResponseEntity<Void> {
+        Validator.checkIfCardIdIsValid(cardId)
+        cardsService.removeFromCollection(cardId)
+        return ResponseEntity(HttpStatus.NO_CONTENT)
+    }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/com/vmaier/marvel/snap/cards/db/dao/Card.kt b/src/main/kotlin/com/vmaier/marvel/snap/cards/db/dao/Card.kt
index 6ab3b64..b75515e 100644
--- a/src/main/kotlin/com/vmaier/marvel/snap/cards/db/dao/Card.kt
+++ b/src/main/kotlin/com/vmaier/marvel/snap/cards/db/dao/Card.kt
@@ -10,6 +10,7 @@ data class Card(
     val power: Int,
     val ability: String? = null,
     val url: String? = null,
+    val isOwned: Boolean = false,
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     val id: Int? = null,
diff --git a/src/main/kotlin/com/vmaier/marvel/snap/cards/db/repo/CardRepository.kt b/src/main/kotlin/com/vmaier/marvel/snap/cards/db/repo/CardRepository.kt
index 272ff99..d7f0333 100644
--- a/src/main/kotlin/com/vmaier/marvel/snap/cards/db/repo/CardRepository.kt
+++ b/src/main/kotlin/com/vmaier/marvel/snap/cards/db/repo/CardRepository.kt
@@ -22,4 +22,8 @@ interface CardRepository : CrudRepository<Card, Int> {
     @Modifying
     @Query("UPDATE Card c SET c.url = :url WHERE c.id = :id")
     fun updateImageUrl(@Param("id") id: Int, @Param("url") url: String)
+
+    @Modifying
+    @Query("UPDATE Card c SET c.isOwned = :isOwned WHERE c.id = :id")
+    fun updateIsOwned(@Param("id") id: Int, @Param("isOwned") isOwned: Boolean)
 }
\ No newline at end of file
diff --git a/src/main/kotlin/com/vmaier/marvel/snap/cards/openapi/api/CardsApi.kt b/src/main/kotlin/com/vmaier/marvel/snap/cards/openapi/api/CardsApi.kt
index 799299f..91bf57c 100644
--- a/src/main/kotlin/com/vmaier/marvel/snap/cards/openapi/api/CardsApi.kt
+++ b/src/main/kotlin/com/vmaier/marvel/snap/cards/openapi/api/CardsApi.kt
@@ -117,4 +117,22 @@ interface CardsApi {
     )
     @DeleteMapping
     fun removeCards(): ResponseEntity<Void>
+
+    @Operation(summary = "Add card to collection", description = "TODO ...")
+    @ApiResponses(
+        value = [
+            ApiResponse(responseCode = "204", description = "No Content")
+        ]
+    )
+    @PostMapping("{cardId}/collection")
+    fun addToCollection(@PathVariable("cardId") cardId: Int): ResponseEntity<Void>
+
+    @Operation(summary = "Remove card from collection", description = "TODO ...")
+    @ApiResponses(
+        value = [
+            ApiResponse(responseCode = "204", description = "No Content")
+        ]
+    )
+    @DeleteMapping("{cardId}/collection")
+    fun removeFromCollection(@PathVariable("cardId") cardId: Int): ResponseEntity<Void>
 }
\ No newline at end of file
diff --git a/src/main/kotlin/com/vmaier/marvel/snap/cards/service/CardsService.kt b/src/main/kotlin/com/vmaier/marvel/snap/cards/service/CardsService.kt
index ced4608..c165b2b 100644
--- a/src/main/kotlin/com/vmaier/marvel/snap/cards/service/CardsService.kt
+++ b/src/main/kotlin/com/vmaier/marvel/snap/cards/service/CardsService.kt
@@ -43,7 +43,7 @@ class CardsService constructor(
         return cards
     }
 
-    fun getAllCardsByKeyword(keyword: String?, cost: Int?, power: Int?): Iterable<Card> {
+    fun getAllCardsByKeyword(keyword: String?, cost: Int?, power: Int?, isOwned: Boolean?): Iterable<Card> {
         var cards = if (keyword.isNullOrEmpty()) {
             cardRepository.findAll()
         } else {
@@ -59,6 +59,11 @@ class CardsService constructor(
                 card.power == power
             }
         }
+        if (isOwned != null) {
+            cards = cards.filter { card ->
+                card.isOwned == isOwned
+            }
+        }
         return cards
     }
 
@@ -81,4 +86,12 @@ class CardsService constructor(
     fun removeAllCards() {
         cardRepository.deleteAll()
     }
+
+    fun addToCollection(cardId: Int) {
+        cardRepository.updateIsOwned(getOneCard(cardId).id!!, true)
+    }
+
+    fun removeFromCollection(cardId: Int) {
+        cardRepository.updateIsOwned(getOneCard(cardId).id!!, false)
+    }
 }
\ No newline at end of file
diff --git a/src/main/resources/db/migration/V1_0_0__Initial.sql b/src/main/resources/db/migration/V1_0_0__Initial.sql
index b4a4166..2b65ef8 100644
--- a/src/main/resources/db/migration/V1_0_0__Initial.sql
+++ b/src/main/resources/db/migration/V1_0_0__Initial.sql
@@ -1,9 +1,10 @@
 CREATE TABLE cards
 (
-    id      SERIAL PRIMARY KEY,
-    ability VARCHAR(1024),
-    cost    INTEGER NOT NULL,
-    name    VARCHAR(255),
-    power   INTEGER NOT NULL,
-    url     VARCHAR(255)
+    id       SERIAL PRIMARY KEY,
+    ability  VARCHAR(1024),
+    cost     INTEGER NOT NULL,
+    name     VARCHAR(255),
+    power    INTEGER NOT NULL,
+    url      VARCHAR(255),
+    is_owned BOOLEAN
 );
diff --git a/src/main/resources/templates/card-grid.html b/src/main/resources/templates/card-grid.html
index 738753a..522e833 100644
--- a/src/main/resources/templates/card-grid.html
+++ b/src/main/resources/templates/card-grid.html
@@ -5,57 +5,82 @@
     <title>All cards</title>
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet"/>
     <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@48,400,0,0"
+          rel="stylesheet"/>
     <script>
         function imageClicked(value) {
             location.href = "cards/" + value;
         }
+        function toggleCollectionStatus(cardId, owned) {
+            fetch("/v1/cards/" + cardId + "/collection", {
+                method: owned === 'true' ? "DELETE" : "POST"
+            })
+            document.getElementById("card-" + cardId).classList.remove(owned === 'true' ? "bg-success" : "bg-secondary");
+            document.getElementById("card-" + cardId).classList.add(owned === 'true' ? "bg-secondary" : "bg-success");
+        }
     </script>
 </head>
 <body>
 <h1 class="mx-4 my-4">All cards</h1>
-<div class="ms-4 d-flex">
-    <a class="btn btn-outline-primary" href="cards">
+<div class="ms-4" style="display: inline-flex; flex-wrap: wrap;">
+    <a class="my-1 btn btn-outline-primary" href="cards">
         <i class="material-icons" style="font-size: 20px; vertical-align: text-bottom;">table_rows</i>
     </a>
     <form class="d-flex" th:action="@{/card-grid?keyword=${keyword}}" th:method="GET">
         <input name="cost" th:if="${cost != null}" th:value="${cost}" type="hidden"/>
         <input name="power" th:if="${power != null}" th:value="${power}" type="hidden"/>
-        <input class="ms-1 form-control" placeholder="Search" th:name="keyword" th:value="${keyword}" type="text"/>
-        <button class="ms-1 btn btn-primary" type="submit">
+        <input name="isOwned" th:if="${isOwned != null}" th:value="${isOwned}" type="hidden"/>
+        <input class="ms-1 my-1 form-control" placeholder="Search" th:name="keyword" th:value="${keyword}" type="text"/>
+        <button class="ms-1 my-1 btn btn-primary" type="submit">
             <i class="material-icons" style="font-size: 20px; vertical-align: text-bottom;">search</i>
         </button>
     </form>
-    <form class="ms-2 d-inline-flex">
+    <form class="ms-2 d-flex">
         <input name="keyword" th:if="${keyword != null}" th:value="${keyword}" type="hidden"/>
-        <div class="d-flex text-center">
+        <div class="d-flex">
             <label class="me-1 my-auto control-label" for="cost">Cost:</label>
-            <select class="form-select" id="cost" name="cost">
+            <select class="my-auto form-select" id="cost" name="cost">
                 <option value="">any</option>
                 <option th:each="i : ${costValues}" th:selected="${i} == ${cost}" th:text="${i}"
                         th:value="${i}"></option>
             </select>
         </div>
-        <div class="form-group d-flex">
+        <div class="d-flex">
             <label class="ms-2 me-1 my-auto control-label" for="power">Power:</label>
-            <select class="ms-1 form-select" id="power" name="power">
+            <select class="ms-1 my-auto form-select" id="power" name="power">
                 <option value="">any</option>
                 <option th:each="i : ${powerValues}" th:selected="${i} == ${power}" th:text="${i}"
                         th:value="${i}"></option>
             </select>
         </div>
-        <button class="ms-2 btn btn-primary" type="submit">Apply</button>
+        <div class="d-flex">
+            <label class="ms-2 me-1 my-auto control-label" for="isOwned">Status:</label>
+            <select class="ms-1 my-auto form-select" id="isOwned" name="isOwned">
+                <option value="" th:selected="${isOwned eq null}">any</option>
+                <option value="true" th:selected="${isOwned eq true}">owned</option>
+                <option value="false" th:selected="${isOwned eq false}">not owned</option>
+            </select>
+        </div>
+        <button class="ms-1 my-1 btn btn-primary" type="submit">Apply</button>
     </form>
-    <a class="ms-1 btn btn-primary" href="new-card">Add card</a>
-    <form class="d-flex" th:action="@{/cards}" th:method="DELETE">
+    <a class="ms-1 my-1 d-flex btn btn-primary" href="new-card">Add card</a>
+    <form class="my-1 d-flex" th:action="@{/cards}" th:method="DELETE">
         <button class="ms-1 btn btn-danger" style="vertical-align: text-bottom;" type="submit">Delete all</button>
     </form>
 </div>
 <div class="container-fluid text-center">
     <div class="row my-4 g-0 px-4">
-        <div class="card mx-auto mt-4" style="width: 18rem; cursor: pointer" th:each="card: ${cards}">
+        <div class="card mx-auto mt-4" style="width: 18rem;" th:each="card: ${cards}">
             <img class="card-img-top"
+                 style="cursor: pointer;"
                  onclick="imageClicked(this.getAttribute('data-id'));"
-                 th:data-id="${card.id}" th:src="@{${card.url}}"/>
+                 th:data-id="${card.id}" th:src="@{${card.url}}" alt="card image"/>
+            <span class="position-absolute top-0 start-100 translate-middle p-1 badge material-symbols-outlined" onclick="toggleCollectionStatus(this.getAttribute('data-id'), this.getAttribute('data-owned'));"
+                  style="cursor: pointer;"
+                  th:classappend="${card.owned ? 'bg-success' : 'bg-secondary'}"
+                  th:data-id="${card.id}"
+                  th:data-owned="${card.owned}"
+                  th:id="'card-' + ${card.id}">check_circle</span>
             <div class="card-body">
                 <h5 class="card-title" th:text="${card.name}"></h5>
                 <p class="card-text" th:text="${card.ability eq '' ? 'No ability' : card.ability}"></p>
diff --git a/src/main/resources/templates/cards.html b/src/main/resources/templates/cards.html
index f2260ff..34a684a 100644
--- a/src/main/resources/templates/cards.html
+++ b/src/main/resources/templates/cards.html
@@ -5,6 +5,8 @@
     <title>All cards</title>
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet"/>
     <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@48,400,0,0"
+          rel="stylesheet"/>
     <script>
         function imageClicked(value) {
             location.href = "cards/" + value;
@@ -32,23 +34,26 @@ <h1 class="mx-4 my-4">All cards</h1>
     <table class="mx-3 table table-hover align-middle">
         <thead>
         <tr>
-            <th scope="col"></th>
-            <th scope="col">Name</th>
-            <th scope="col">Cost</th>
-            <th scope="col">Power</th>
-            <th scope="col">Ability</th>
+            <th class="col-md-1 text-center" scope="col">Owned</th>
+            <th class="col-md-1" scope="col"></th>
+            <th class="col-md-1" scope="col">Name</th>
+            <th class="col-md-1 text-center" scope="col">Cost</th>
+            <th class="col-md-1 text-center" scope="col">Power</th>
+            <th class="col-md-7" scope="col">Ability</th>
         </tr>
         </thead>
         <tbody>
         <tr onclick="imageClicked(this.getAttribute('data-id'));" style="cursor: pointer"
             th:data-id="${card.id}"
             th:each="card: ${cardPage.content}">
+            <td class="text-center"><span style="color: green;" class="material-symbols-outlined"
+                                          th:text="${card.owned} ? 'check_circle' : ''"></span></td>
             <td>
-                <img class="img-fluid" style="width: 100px" th:src="@{${card.url}}"/>
+                <img class="img-fluid" style="width: 100px" th:src="@{${card.url}}" alt="card image"/>
             </td>
             <td th:text="${card.name}"/>
-            <td th:text="${card.cost}"/>
-            <td th:text="${card.power}"/>
+            <td class="text-center" th:text="${card.cost}"/>
+            <td class="text-center" th:text="${card.power}"/>
             <td th:text="${card.ability}"/>
         </tr>
         </tbody>
diff --git a/src/main/resources/templates/index.html b/src/main/resources/templates/index.html
index 62802b7..2dbcad2 100644
--- a/src/main/resources/templates/index.html
+++ b/src/main/resources/templates/index.html
@@ -7,7 +7,7 @@
 </head>
 <body>
 <h1 class="mx-4 my-4">Marvel SNAP cards</h1>
-<a class="ms-4 btn btn-outline-primary" href="cards">List all</a>
+<a class="ms-4 btn btn-outline-primary" href="card-grid">List all</a>
 <a class="ms-1 btn btn-outline-primary" href="new-card">Add card</a>
 </body>
 </html>
\ No newline at end of file