Wheniwasyourage wrote StarDreamer, could you be confusing the heart which allows you to practise previous mistakes with the hearts that those using the app get and can lose with mistakes? If you are, like me, using the laptop version, the hearts are the first kind (assuming you are on Plus) and the rewards are lingots, not gems as on the app.
Thank you.
Yes, having read your post I think I am comfusing them.
Well, as for Plus, I got offered a free three day use of Plus today. Since then I clicked the "heart on a laptop" and got the chance for a specialised lesson to correc my earlier mistakes.
I also got offered, and took, a progress test.
Now, as I had not clicked on the "heart on a laptop" before getting the 3 days of plus, I don't know if that is or is not a Plus-only feature.
Also, I don't know if this three free days of Plus is a once only ever or if I might get offered one again as a reward for using duolingo.
But i have now done, without any mistakes, the first part of the first "circle" of Scottish Gaelic as a result of reading about it in this thread.