diff --git a/cmd/itctl/main.go b/cmd/itctl/main.go
index 48c1b3b..ba2f1b9 100644
--- a/cmd/itctl/main.go
+++ b/cmd/itctl/main.go
@@ -2,6 +2,8 @@ package main
 
 import (
 	"os"
+	"os/signal"
+	"syscall"
 
 	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
@@ -174,6 +176,49 @@ func main() {
 					},
 				},
 			},
+			{
+				Name:  "watch",
+				Usage: "Watch a value for changes",
+				Subcommands: []*cli.Command{
+					{
+						Flags: []cli.Flag{
+							&cli.BoolFlag{Name: "json"},
+							&cli.BoolFlag{Name: "shell"},
+						},
+						Name:   "heart",
+						Usage:  "Watch heart rate value for changes",
+						Action: watchHeart,
+					},
+					{
+						Flags: []cli.Flag{
+							&cli.BoolFlag{Name: "json"},
+							&cli.BoolFlag{Name: "shell"},
+						},
+						Name:   "steps",
+						Usage:  "Watch step count value for changes",
+						Action: watchStepCount,
+					},
+					{
+						Flags: []cli.Flag{
+							&cli.BoolFlag{Name: "json"},
+							&cli.BoolFlag{Name: "shell"},
+						},
+						Name:   "motion",
+						Usage:  "Watch motion coordinates for changes",
+						Action: watchMotion,
+					},
+					{
+						Flags: []cli.Flag{
+							&cli.BoolFlag{Name: "json"},
+							&cli.BoolFlag{Name: "shell"},
+						},
+						Name:    "battery",
+						Aliases: []string{"batt"},
+						Usage:   "Watch battery level value for changes",
+						Action:  watchBattLevel,
+					},
+				},
+			},
 		},
 		Before: func(c *cli.Context) error {
 			newClient, err := api.New(c.String("socket-path"))
@@ -196,3 +241,17 @@ func main() {
 		log.Fatal().Err(err).Msg("Error while running app")
 	}
 }
+
+func catchSignal(fn func()) {
+	sigCh := make(chan os.Signal, 1)
+	signal.Notify(
+		sigCh,
+		syscall.SIGINT,
+		syscall.SIGTERM,
+	)
+	go func() {
+		<-sigCh
+		fn()
+		os.Exit(0)
+	}()
+}
diff --git a/cmd/itctl/watch.go b/cmd/itctl/watch.go
new file mode 100644
index 0000000..1be121a
--- /dev/null
+++ b/cmd/itctl/watch.go
@@ -0,0 +1,104 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/urfave/cli/v2"
+)
+
+func watchHeart(c *cli.Context) error {
+	heartCh, cancel, err := client.WatchHeartRate()
+	if err != nil {
+		return err
+	}
+
+	catchSignal(cancel)
+
+	for heartRate := range heartCh {
+		if c.Bool("json") {
+			json.NewEncoder(os.Stdout).Encode(
+				map[string]uint8{"heartRate": heartRate},
+			)
+		} else if c.Bool("shell") {
+			fmt.Printf("HEART_RATE=%d\n", heartRate)
+		} else {
+			fmt.Println(heartRate, "BPM")
+		}
+	}
+
+	return nil
+}
+
+func watchBattLevel(c *cli.Context) error {
+	battLevelCh, cancel, err := client.WatchBatteryLevel()
+	if err != nil {
+		return err
+	}
+
+	catchSignal(cancel)
+
+	for battLevel := range battLevelCh {
+		if c.Bool("json") {
+			json.NewEncoder(os.Stdout).Encode(
+				map[string]uint8{"battLevel": battLevel},
+			)
+		} else if c.Bool("shell") {
+			fmt.Printf("BATTERY_LEVEL=%d\n", battLevel)
+		} else {
+			fmt.Printf("%d%%\n", battLevel)
+		}
+	}
+
+	return nil
+}
+
+func watchStepCount(c *cli.Context) error {
+	stepCountCh, cancel, err := client.WatchStepCount()
+	if err != nil {
+		return err
+	}
+
+	catchSignal(cancel)
+
+	for stepCount := range stepCountCh {
+		if c.Bool("json") {
+			json.NewEncoder(os.Stdout).Encode(
+				map[string]uint32{"stepCount": stepCount},
+			)
+		} else if c.Bool("shell") {
+			fmt.Printf("STEP_COUNT=%d\n", stepCount)
+		} else {
+			fmt.Println(stepCount, "Steps")
+		}
+	}
+
+	return nil
+}
+
+func watchMotion(c *cli.Context) error {
+	motionCh, cancel, err := client.WatchMotion()
+	if err != nil {
+		return err
+	}
+
+	catchSignal(cancel)
+
+	for motionVals := range motionCh {
+		if c.Bool("json") {
+			json.NewEncoder(os.Stdout).Encode(motionVals)
+		} else if c.Bool("shell") {
+			fmt.Printf(
+				"X=%d\nY=%d\nZ=%d\n",
+				motionVals.X,
+				motionVals.Y,
+				motionVals.Z,
+			)
+		} else {
+			fmt.Println(motionVals)
+		}
+	}
+
+	return nil
+}
diff --git a/go.mod b/go.mod
index fbad189..056c0ae 100644
--- a/go.mod
+++ b/go.mod
@@ -11,11 +11,11 @@ require (
 	github.com/knadh/koanf v1.4.0
 	github.com/mattn/go-isatty v0.0.14
 	github.com/mozillazg/go-pinyin v0.19.0
-	github.com/rs/zerolog v1.26.0
+	github.com/rs/zerolog v1.26.1
 	github.com/smallnest/rpcx v1.7.4
 	github.com/urfave/cli/v2 v2.3.0
 	github.com/vmihailenco/msgpack/v5 v5.3.5
-	go.arsenm.dev/infinitime v0.0.0-20220416112421-b7a50271bece
+	go.arsenm.dev/infinitime v0.0.0-20220424014025-bebd1017c532
 	golang.org/x/text v0.3.7
 )
 
diff --git a/go.sum b/go.sum
index 7328902..547652f 100644
--- a/go.sum
+++ b/go.sum
@@ -447,8 +447,8 @@ github.com/rpcxio/libkv v0.5.1-0.20210420120011-1fceaedca8a5/go.mod h1:zHGgtLr3c
 github.com/rs/cors v1.8.2 h1:KCooALfAYGs415Cwu5ABvv9n9509fSiG5SQJn/AQo4U=
 github.com/rs/cors v1.8.2/go.mod h1:XyqrcTp5zjWr1wsJ8PIRZssZ8b/WMcMf71DJnit4EMU=
 github.com/rs/xid v1.3.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
-github.com/rs/zerolog v1.26.0 h1:ORM4ibhEZeTeQlCojCK2kPz1ogAY4bGs4tD+SaAdGaE=
-github.com/rs/zerolog v1.26.0/go.mod h1:yBiM87lvSqX8h0Ww4sdzNSkVYZ8dL2xjZJG1lAuGZEo=
+github.com/rs/zerolog v1.26.1 h1:/ihwxqH+4z8UxyI70wM1z9yCvkWcfz/a3mj48k/Zngc=
+github.com/rs/zerolog v1.26.1/go.mod h1:/wSSJWX7lVrsOwlbyTRSOJvqRlc+WjWlfes+CiJ+tmc=
 github.com/rubyist/circuitbreaker v2.2.1+incompatible h1:KUKd/pV8Geg77+8LNDwdow6rVCAYOp8+kHUyFvL6Mhk=
 github.com/rubyist/circuitbreaker v2.2.1+incompatible/go.mod h1:Ycs3JgJADPuzJDwffe12k6BZT8hxVi6lFK+gWYJLN4A=
 github.com/russross/blackfriday v1.5.2 h1:HyvC0ARfnZBqnXwABFeSZHpKvJHJJfPz81GNueLj0oo=
@@ -560,8 +560,8 @@ github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 github.com/yuin/goldmark v1.4.4 h1:zNWRjYUW32G9KirMXYHQHVNFkXvMI7LpgNW2AgYAoIs=
 github.com/yuin/goldmark v1.4.4/go.mod h1:rmuwmfZ0+bvzB24eSC//bk1R1Zp3hM0OXYv/G2LIilg=
-go.arsenm.dev/infinitime v0.0.0-20220416112421-b7a50271bece h1:ns/GMc4E8ZUZ9TEXhXgU4M+5sRaOLTFFoBWEJ67p3YM=
-go.arsenm.dev/infinitime v0.0.0-20220416112421-b7a50271bece/go.mod h1:Prvwx7Y2y8HsNRA1tPptduW9jzuw/JffmocvoHcDbYo=
+go.arsenm.dev/infinitime v0.0.0-20220424014025-bebd1017c532 h1:HOFaxlEKacGw1nDs23qRv+FTX+PR+v4l1Sujfq5S3pc=
+go.arsenm.dev/infinitime v0.0.0-20220424014025-bebd1017c532/go.mod h1:1cBQ3fp6QlRbSqu9kEBAHsVThINj31FtqHIYVsQ7wgg=
 go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
 go.opentelemetry.io/otel v0.19.0/go.mod h1:j9bF567N9EfomkSidSfmMwIwIBuP37AMAIzVW85OxSg=
 go.opentelemetry.io/otel v1.6.3 h1:FLOfo8f9JzFVFVyU+MSRJc2HdEAXQgm7pIv2uFKRSZE=
@@ -585,6 +585,7 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20201012173705-84dcc777aaee/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/crypto v0.0.0-20211215165025-cf75a172585e/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
 golang.org/x/crypto v0.0.0-20220408190544-5352b0902921 h1:iU7T1X1J6yxDr0rda54sWGkHgOp5XJrqm79gcNlC2VM=
 golang.org/x/crypto v0.0.0-20220408190544-5352b0902921/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=