diff --git a/internal/handler/app.go b/internal/handler/app.go
new file mode 100644
index 0000000..393fe6e
--- /dev/null
+++ b/internal/handler/app.go
@@ -0,0 +1,103 @@
+package handler
+
+import (
+	"strconv"
+
+	"gotest/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+// AppHandler 应用数据处理器
+type AppHandler struct {
+	svc *service.AppService
+}
+
+// NewAppHandler 创建应用数据处理器
+func NewAppHandler(svc *service.AppService) *AppHandler {
+	return &AppHandler{svc: svc}
+}
+
+// GetHomeData 获取应用首页数据 GET /api/v1/app/home
+func (h *AppHandler) GetHomeData(c *gin.Context) {
+	data, err := h.svc.GetHomeData()
+	if err != nil {
+		FailInternal(c, "获取首页数据失败")
+		return
+	}
+	Success(c, data)
+}
+
+// ListCategories 获取应用分类 GET /api/v1/app/categories
+func (h *AppHandler) ListCategories(c *gin.Context) {
+	data, err := h.svc.ListCategories()
+	if err != nil {
+		FailInternal(c, "获取分类失败")
+		return
+	}
+	Success(c, data)
+}
+
+// ListApps 获取应用列表 GET /api/v1/app/apps?category_id=&keyword=&sort=&page=&page_size=
+func (h *AppHandler) ListApps(c *gin.Context) {
+	categoryID, _ := strconv.ParseUint(c.Query("category_id"), 10, 64)
+	keyword := c.Query("keyword")
+	sort := c.Query("sort")
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "12"))
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 || pageSize > 100 {
+		pageSize = 12
+	}
+	data, err := h.svc.ListApps(uint(categoryID), keyword, sort, page, pageSize)
+	if err != nil {
+		FailInternal(c, "获取应用列表失败")
+		return
+	}
+	Success(c, data)
+}
+
+// GetApp 获取应用详情 GET /api/v1/app/apps/:id
+func (h *AppHandler) GetApp(c *gin.Context) {
+	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
+	if err != nil {
+		FailBadRequest(c, "无效的应用 ID")
+		return
+	}
+	data, err := h.svc.GetApp(uint(id))
+	if err != nil {
+		FailBadRequest(c, "应用不存在")
+		return
+	}
+	Success(c, data)
+}
+
+// ListFeatured 获取精选应用 GET /api/v1/app/featured?limit=
+func (h *AppHandler) ListFeatured(c *gin.Context) {
+	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "8"))
+	if limit < 1 || limit > 50 {
+		limit = 8
+	}
+	data, err := h.svc.ListFeatured(limit)
+	if err != nil {
+		FailInternal(c, "获取精选应用失败")
+		return
+	}
+	Success(c, data)
+}
+
+// ListNew 获取新上架应用 GET /api/v1/app/new?limit=
+func (h *AppHandler) ListNew(c *gin.Context) {
+	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "4"))
+	if limit < 1 || limit > 50 {
+		limit = 4
+	}
+	data, err := h.svc.ListNew(limit)
+	if err != nil {
+		FailInternal(c, "获取新上架应用失败")
+		return
+	}
+	Success(c, data)
+}