diff --git a/app.go b/app.go
index 3ee7262..90be757 100644
--- a/app.go
+++ b/app.go
@@ -25,10 +25,12 @@ type app struct {
 	state   *State
 
 	schedules         pq.PriorityQueue
-	entityListeners   map[string][]entityListener
+	entityListeners   map[string][]*entityListener
 	entityListenersId int64
 }
 
+type TimeString string
+
 /*
 NewApp establishes the websocket connection and returns an object
 you can use to register schedules and listeners.
@@ -50,7 +52,7 @@ func NewApp(connString string) app {
 		service:         service,
 		state:           state,
 		schedules:       pq.New(),
-		entityListeners: map[string][]entityListener{},
+		entityListeners: map[string][]*entityListener{},
 	}
 }
 
@@ -85,9 +87,9 @@ func (a *app) RegisterSchedule(s schedule) {
 func (a *app) RegisterEntityListener(el entityListener) {
 	for _, entity := range el.entityIds {
 		if elList, ok := a.entityListeners[entity]; ok {
-			a.entityListeners[entity] = append(elList, el)
+			a.entityListeners[entity] = append(elList, &el)
 		} else {
-			a.entityListeners[entity] = []entityListener{el}
+			a.entityListeners[entity] = []*entityListener{&el}
 		}
 	}
 }
@@ -95,32 +97,34 @@ func (a *app) RegisterEntityListener(el entityListener) {
 // Sunrise take an optional string that is passed to time.ParseDuration.
 // Examples include "-1.5h", "30m", etc. See https://pkg.go.dev/time#ParseDuration
 // for full list.
-func (a *app) Sunrise(offset ...string) string {
+func (a *app) Sunrise(offset ...TimeString) string {
 	return getSunriseSunset(a, true, offset)
 }
 
 // Sunset take an optional string that is passed to time.ParseDuration.
 // Examples include "-1.5h", "30m", etc. See https://pkg.go.dev/time#ParseDuration
 // for full list.
-func (a *app) Sunset(offset ...string) string {
+func (a *app) Sunset(offset ...TimeString) string {
 	return getSunriseSunset(a, false, offset)
 }
 
-func getSunriseSunset(a *app, sunrise bool, offset []string) string {
+func getSunriseSunset(a *app, sunrise bool, offset []TimeString) string {
 	printString := "Sunset"
 	attrKey := "next_setting"
 	if sunrise {
 		printString = "Sunrise"
 		attrKey = "next_rising"
 	}
+
 	var t time.Duration
 	var err error
 	if len(offset) == 1 {
-		t, err = time.ParseDuration(offset[0])
+		t, err = time.ParseDuration(string(offset[0]))
 		if err != nil {
 			log.Fatalf("Could not parse offset passed to %s: \"%s\"", printString, offset[0])
 		}
 	}
+
 	// get next sunrise/sunset time from HA
 	state, err := a.state.Get("sun.sun")
 	if err != nil {
@@ -172,20 +176,4 @@ func (a *app) Start() {
 			go callEntityListeners(a, msg.Raw)
 		}
 	}
-
-	// NOTE:should the prio queue and websocket listener both write to a channel or something?
-	// then select from that and spawn new goroutine to call callback?
-
-	// TODO: loop through schedules and create heap priority queue
-
-	// TODO: figure out looping listening to messages for
-	// listeners
 }
-
-const (
-	FrequencyMissing time.Duration = 0
-
-	Daily    time.Duration = time.Hour * 24
-	Hourly   time.Duration = time.Hour
-	Minutely time.Duration = time.Minute
-)
diff --git a/entitylistener.go b/entitylistener.go
index a3b9a2b..758cbcb 100644
--- a/entitylistener.go
+++ b/entitylistener.go
@@ -3,6 +3,7 @@ package gomeassistant
 import (
 	"encoding/json"
 	"errors"
+	"log"
 	"time"
 
 	"github.com/golang-module/carbon"
@@ -16,12 +17,13 @@ type entityListener struct {
 	toState      string
 	betweenStart string
 	betweenEnd   string
+	throttle     time.Duration
+	lastRan      carbon.Carbon
 	err          error
 }
 
 type entityListenerCallback func(*Service, EntityData)
 
-// TODO: use this to flatten json sent from HA for trigger event
 type EntityData struct {
 	TriggerEntityId string
 	FromState       string
@@ -52,43 +54,12 @@ type msgState struct {
 	Attributes  map[string]any `json:"attributes"`
 }
 
-type triggerMsg struct {
-	Id    int64  `json:"id"`
-	Type  string `json:"type"`
-	Event struct {
-		Variables struct {
-			Trigger struct {
-				EntityId  string          `json:"entity_id"`
-				FromState triggerMsgState `json:"from_state"`
-				ToState   triggerMsgState `json:"to_state"`
-			}
-		} `json:"variables"`
-	} `json:"event"`
-}
-
-type triggerMsgState struct {
-	State       string         `json:"state"`
-	Attributes  map[string]any `json:"attributes"`
-	LastChanged string         `json:"last_changed"`
-}
-
-type subscribeMsg struct {
-	Id      int64               `json:"id"`
-	Type    string              `json:"type"`
-	Trigger subscribeMsgTrigger `json:"trigger"`
-}
-
-type subscribeMsgTrigger struct {
-	Platform string `json:"platform"`
-	EntityId string `json:"entity_id"`
-	From     string `json:"from"`
-	To       string `json:"to"`
-}
-
 /* Methods */
 
 func EntityListenerBuilder() elBuilder1 {
-	return elBuilder1{entityListener{}}
+	return elBuilder1{entityListener{
+		lastRan: carbon.Now().StartOfCentury(),
+	}}
 }
 
 type elBuilder1 struct {
@@ -145,6 +116,15 @@ func (b elBuilder3) ToState(s string) elBuilder3 {
 	return b
 }
 
+func (b elBuilder3) Throttle(s TimeString) elBuilder3 {
+	d, err := time.ParseDuration(string(s))
+	if err != nil {
+		log.Fatalf("Couldn't parse string duration passed to Throttle(): \"%s\" see https://pkg.go.dev/time#ParseDuration for valid time units", s)
+	}
+	b.entityListener.throttle = d
+	return b
+}
+
 func (b elBuilder3) Build() entityListener {
 	return b.entityListener
 }
@@ -197,6 +177,13 @@ func callEntityListeners(app *app, msgBytes []byte) {
 			return
 		}
 
+		// don't run callback if Throttle is set and that duration hasn't passed since lastRan
+		if l.throttle.Seconds() > 0 && // throttle is set
+			!l.lastRan.Eq(carbon.Now().StartOfCentury()) && // lastRan is set aka this callback has been called since starting gomeassistant
+			l.lastRan.DiffAbsInSeconds(carbon.Now()) < int64(l.throttle.Seconds()) { // it's been less than <throttle> seconds since it last ran
+			return
+		}
+
 		entityData := EntityData{
 			TriggerEntityId: eid,
 			FromState:       data.OldState.State,
@@ -205,6 +192,7 @@ func callEntityListeners(app *app, msgBytes []byte) {
 			ToAttributes:    data.NewState.Attributes,
 			LastChanged:     data.OldState.LastChanged,
 		}
-		l.callback(app.service, entityData)
+		go l.callback(app.service, entityData)
+		l.lastRan = carbon.Now()
 	}
 }
diff --git a/cmd/main/testing.go b/example/main/testing.go
similarity index 98%
rename from cmd/main/testing.go
rename to example/main/testing.go
index bed30c0..13e22ed 100644
--- a/cmd/main/testing.go
+++ b/example/main/testing.go
@@ -19,6 +19,7 @@ func main() {
 		EntityIds("group.office_ceiling_lights").
 		Call(listenerCB).
 		OnlyAfter("23:03").
+		// Throttle("5s").
 		Build()
 	app.RegisterEntityListener(simpleListener)
 
diff --git a/schedule.go b/schedule.go
index 38d0e86..b726a70 100644
--- a/schedule.go
+++ b/schedule.go
@@ -107,8 +107,8 @@ func (sb scheduleBuilderDaily) At(s string) scheduleBuilderEnd {
 	return scheduleBuilderEnd(sb)
 }
 
-func (sb scheduleBuilderCall) Every(s string) scheduleBuilderCustom {
-	d, err := time.ParseDuration(s)
+func (sb scheduleBuilderCall) Every(s TimeString) scheduleBuilderCustom {
+	d, err := time.ParseDuration(string(s))
 	if err != nil {
 		log.Fatalf("couldn't parse string duration passed to Every(): \"%s\" see https://pkg.go.dev/time#ParseDuration for valid time units", s)
 	}
@@ -116,8 +116,8 @@ func (sb scheduleBuilderCall) Every(s string) scheduleBuilderCustom {
 	return scheduleBuilderCustom(sb)
 }
 
-func (sb scheduleBuilderCustom) Offset(s string) scheduleBuilderEnd {
-	t, err := time.ParseDuration(s)
+func (sb scheduleBuilderCustom) Offset(s TimeString) scheduleBuilderEnd {
+	t, err := time.ParseDuration(string(s))
 	if err != nil {
 		log.Fatalf("Couldn't parse string duration passed to Offset(): \"%s\" see https://pkg.go.dev/time#ParseDuration for valid time units", s)
 	}