Update offline-looping-and-monitoring.md

Add a note explaining that Spike is different from xDrip+

Author: jauntySerpent

docs/docs/Customize-Iterate/offline-looping-and-monitoring.md

@@ -23,7 +23,7 @@ Dexcom CGM users have a few different alternatives to retrieve blood glucose val
 
 1. Android users can use the xDrip+ Android app. The details for setting up  offline looping with xDripAPS are described in the section below. The naming can be confusing. xDrip+ (maintained by [@jamorham](https://jamorham.github.io/#xdrip-plus)) is the app being actively developed. While Google may lead you to several older versions of the xDrip/xDrip+ Android app, you can always get the latest version here:
    * xDrip+: [https://github.com/NightscoutFoundation/xDrip](https://github.com/NightscoutFoundation/xDrip)
-   * There is no direct iOS version of xDrip+. iOSxdripreader is a different app with a different set of features.
+   * There is no direct iOS version of xDrip+. iOSxdripreader and Spike are different apps, each with a different set of features.
 
 2. For iPhone users, it is possible to setup a modified Loop app to bring data in locally such as the one you will find here: https://github.com/thebookins/Loop. This solution requires a build of an iOS app on a Mac and the use of a free Dev licenses (which will give you an app to test, but will only stay deployed for 7 days) or a full Dev license ($99/year). The modified Loop app will "listen in" for Dexcom data on iPhone, upload it to a scaled down version of Nightscout on your rig where xDrip is running. This solution requires some Mac OS and iOS savvy, and exploration.