diff --git a/Use-I2P-anonymization-in-your-applications.md b/Use-I2P-anonymization-in-your-applications.md
index 70693e5..ce41d9c 100644
--- a/Use-I2P-anonymization-in-your-applications.md
+++ b/Use-I2P-anonymization-in-your-applications.md
@@ -2,18 +2,20 @@ For developers.
 
 How can you use I2P network anonymization layer in your application:
 
-* using libi2pd
+* using API library
 * using standard I2P APIs
     * SAM
     * BOB
     * I2CP
 * using HTTP/Socks proxies
 
-libi2pd
-=======
+API library
+===========
 
 TODO: write about `api.h`
 
+difference between libi2pd and libi2pd_client: libi2pd has all functions to add I2P support to your app, libi2pd_client is used to expose various client protocols to your application (such as SAM, etc)
+
 Standard I2P APIs
 =================