I don’t think I am the first to catch this but wanted to make sure it was documented.
The Graph widget is listed in the Blynk IOS app but missing in the Blynk Android app.
Not sure if this was intentional to fix some issues with the Android version or just and oversight.
It’s in production now. All the UI is ready, but we are fighting with the live feed.
Any news on this? 
Testing it right now =). There are few bugs at the moment, hopefully tomorrow we’ll finish it. And update will be done in few days later with few more widgets =). Stay tuned.
Cannot find the History Graph widget on iOS app. Although it’s documented on the blynk web site.
History Graph for iOS under development at the moment.