diff --git a/docs/core/app1.md b/docs/core/app1.md
index abc2c39b5d..7384db4330 100644
--- a/docs/core/app1.md
+++ b/docs/core/app1.md
@@ -243,7 +243,7 @@ Note this handler has unfettered access to the store specified by the capability
 For this first example, we will define a simple account that is JSON encoded:
 
 ```go
-type app1Account struct {
+type appAccount struct {
 	Coins sdk.Coins `json:"coins"`
 }
 ```
@@ -294,7 +294,7 @@ func handleFrom(store sdk.KVStore, from sdk.Address, amt sdk.Coins) sdk.Result {
 	}
 
 	// Unmarshal the JSON account bytes.
-	var acc app1Account
+	var acc appAccount
 	err := json.Unmarshal(accBytes, &acc)
 	if err != nil {
 		// InternalError
@@ -326,10 +326,10 @@ func handleFrom(store sdk.KVStore, from sdk.Address, amt sdk.Coins) sdk.Result {
 func handleTo(store sdk.KVStore, to sdk.Address, amt sdk.Coins) sdk.Result {
 	// Add msg amount to receiver account
 	accBytes := store.Get(to)
-	var acc app1Account
+	var acc appAccount
 	if accBytes == nil {
 		// Receiver account does not already exist, create a new one.
-		acc = app1Account{}
+		acc = appAccount{}
 	} else {
 		// Receiver account already exists. Retrieve and decode it.
 		err := json.Unmarshal(accBytes, &acc)
diff --git a/docs/core/examples/app1.go b/docs/core/examples/app1.go
index 2ac8fa5298..ec5b779e7c 100644
--- a/docs/core/examples/app1.go
+++ b/docs/core/examples/app1.go
@@ -149,7 +149,7 @@ func handleFrom(store sdk.KVStore, from sdk.Address, amt sdk.Coins) sdk.Result {
 	}
 
 	// Unmarshal the JSON account bytes.
-	var acc app1Account
+	var acc appAccount
 	err := json.Unmarshal(accBytes, &acc)
 	if err != nil {
 		// InternalError
@@ -181,10 +181,10 @@ func handleFrom(store sdk.KVStore, from sdk.Address, amt sdk.Coins) sdk.Result {
 func handleTo(store sdk.KVStore, to sdk.Address, amt sdk.Coins) sdk.Result {
 	// Add msg amount to receiver account
 	accBytes := store.Get(to)
-	var acc app1Account
+	var acc appAccount
 	if accBytes == nil {
 		// Receiver account does not already exist, create a new one.
-		acc = app1Account{}
+		acc = appAccount{}
 	} else {
 		// Receiver account already exists. Retrieve and decode it.
 		err := json.Unmarshal(accBytes, &acc)
@@ -210,7 +210,7 @@ func handleTo(store sdk.KVStore, to sdk.Address, amt sdk.Coins) sdk.Result {
 	return sdk.Result{}
 }
 
-type app1Account struct {
+type appAccount struct {
 	Coins sdk.Coins `json:"coins"`
 }
 
diff --git a/docs/core/examples/app2.go b/docs/core/examples/app2.go
index 87bf0ba1c3..5959fcd393 100644
--- a/docs/core/examples/app2.go
+++ b/docs/core/examples/app2.go
@@ -25,7 +25,6 @@ var (
 )
 
 func NewCodec() *wire.Codec {
-	// TODO register
 	cdc := wire.NewCodec()
 	cdc.RegisterInterface((*sdk.Msg)(nil), nil)
 	cdc.RegisterConcrete(MsgSend{}, "example/MsgSend", nil)
@@ -190,10 +189,10 @@ func handleMsgIssue(ctx sdk.Context, keyMain *sdk.KVStoreKey, keyAcc *sdk.KVStor
 
 		// Add coins to receiver account
 		bz := accStore.Get(o.Address)
-		var acc account
+		var acc appAccount
 		if bz == nil {
 			// Receiver account does not already exist, create a new one.
-			acc = account{}
+			acc = appAccount{}
 		} else {
 			// Receiver account already exists. Retrieve and decode it.
 			err := json.Unmarshal(bz, &acc)
@@ -219,7 +218,7 @@ func handleMsgIssue(ctx sdk.Context, keyMain *sdk.KVStoreKey, keyAcc *sdk.KVStor
 	}
 
 	return sdk.Result{
-		// TODO: Tags
+	// TODO: Tags
 	}
 
 }
@@ -238,11 +237,6 @@ func (tx app2Tx) GetMsgs() []sdk.Msg {
 	return []sdk.Msg{tx.Msg}
 }
 
-// TODO: remove the need for this
-func (tx app2Tx) GetMemo() string {
-	return ""
-}
-
 func (tx app2Tx) GetSignatures() []auth.StdSignature {
 	return tx.Signatures
 }
diff --git a/docs/core/examples/app3.go b/docs/core/examples/app3.go
index 74142fd187..25036ef1b2 100644
--- a/docs/core/examples/app3.go
+++ b/docs/core/examples/app3.go
@@ -21,6 +21,7 @@ const (
 
 func NewApp3(logger log.Logger, db dbm.DB) *bapp.BaseApp {
 
+	// Create the codec with registered Msg types
 	cdc := NewCodec()
 
 	// Create the base application object.
@@ -32,6 +33,7 @@ func NewApp3(logger log.Logger, db dbm.DB) *bapp.BaseApp {
 	keyFees := sdk.NewKVStoreKey("fee")
 
 	// Set various mappers/keepers to interact easily with underlying stores
+	// TODO: Need to register Account interface or use different Codec
 	accountMapper := auth.NewAccountMapper(cdc, keyAccount, &auth.BaseAccount{})
 	accountKeeper := bank.NewKeeper(accountMapper)
 	metadataMapper := NewApp3MetaDataMapper(keyMain)