The Greek app version doesn't include the light bulb info...
... but the online version has it. I have been using Duolingo for 53 days for Spanish and Greek. I have loved the lightbulb information in the Spanish lessons and wondered why the Greek lessons didn't have it. Today I discovered the info is on the Greek online version! This would have made learning Greek easier. I have been instead turning to other information sources to assist me. Please add the light bulbs to the Greek app version. Thanks
You can still get the light bulbs if you use the browser version on your phone as well
I would recommend using the browser version of Duolingo on your phone for the Greek Tips and Notes, as tar recommends above.
It's important to note that the two app versions (IoS and Android) and the web version are all maintained by three different groups, so the features offered on each can vary quite a bit. Currently, the only languages with Tips and Notes on the apps (that I'm aware of) are Chinese, Spanish, possibly French, and German.
Good luck to you! :)
Volgav vitsenanieff nivya kevach varatsach.