diff --git a/src/cc/dapps/Makefile b/src/cc/dapps/Makefile
new file mode 100644
index 000000000..6e7874788
--- /dev/null
+++ b/src/cc/dapps/Makefile
@@ -0,0 +1,11 @@
+# just type make to compile all dapps
+all: zmigrate oraclefeed
+
+zmigrate:
+	$(CC) zmigrate.c -o zmigrate -lm
+
+oraclefeed:
+	$(CC) oraclefeed.c -o oraclefeed -lm
+
+clean:
+	rm zmigrate oraclefeed
diff --git a/src/cc/dapps/README.md b/src/cc/dapps/README.md
new file mode 100644
index 000000000..0d8b2cac2
--- /dev/null
+++ b/src/cc/dapps/README.md
@@ -0,0 +1,28 @@
+# CryptoCondition dApps
+
+## Compiling
+
+To compile all dapps in this directory:
+
+    make
+
+## zmigrate - Sprout to Sapling Migration dApp
+
+This tool converts Sprout zaddress funds into Sapling funds in a new Sapling address.
+
+### Usage
+
+    ./zmigrate zsaplingaddr
+
+The above command may need to be run multiple times to complete the process.
+
+This CLI implementation will be called by GUI wallets, average users do not
+need to worry about using this low-level tool.
+
+## oraclefeed - feed of price data using oracles
+
+### Usage
+
+    ./oraclefeed $ACNAME $ORACLETXID $MYPUBKEY $FORMAT $BINDTXID [refcoin_cli]
+
+Supported formats are L and Ihh. Price data from CoinDesk API.
diff --git a/src/cc/dapps/zmigrate.c b/src/cc/dapps/zmigrate.c
index 73bff3276..84cf4b057 100644
--- a/src/cc/dapps/zmigrate.c
+++ b/src/cc/dapps/zmigrate.c
@@ -932,20 +932,22 @@ again:
         if ( (amount= find_sprout_amount(coinstr,zcaddr)) > txfee )
         {
             // generate taddr, send max of 10000.0001
-            static int64_t lastamount,lastamount2,lastamount3,lastamount4;
-            stdamount = 500 * SATOSHIDEN;
+            static int64_t lastamount,lastamount2,lastamount3,lastamount4,refamount = 5000 * SATOSHIDEN;
+            stdamount = refamount;
             if ( amount == lastamount && amount == lastamount2 )
             {
                 stdamount /= 10;
                 if ( amount == lastamount3 && amount == lastamount4 )
-                    stdamount /= 5;
+                    stdamount /= 10;
             }
+            if ( stdamount < refamount )
+                refamount = stdamount;
             lastamount4 = lastamount3;
             lastamount3 = lastamount2;
             lastamount2 = lastamount;
             lastamount = amount;
-            if ( amount > stdamount+txfee )
-                amount = stdamount + txfee;
+            if ( amount > stdamount+2*txfee )
+                amount = stdamount + 2*txfee;
             if ( getnewaddress(coinaddr,coinstr,"") == 0 )
             {
                 z_sendmany(opidstr,coinstr,"",zcaddr,coinaddr,amount-txfee);