I have 755 gems left. Do I need gems to continue my lessons?
You should switch from the IOS mobile app (tapping word bricks) to the www.DuoLingo.com web portal (translations with typing).
- Does not use health/gems
- You can learn as much as you want
- You can make as many errors as you want to learn from them (normal lessons do not use lifes; only the intro comprehension / checkpoint and skill test-outs use three lifes)
Your Duome page says you have 2283 lingots so you can use those to buy stuff on the website if you run out of gems to buy stuff on the app (purchases sync across platforms)
Not all purchases sync across platforms. The iOS devices use gems and the double or nothing wager pays 100 Gems after 7 days. The other platforms use Lingots paying 10 lingots after 7 days. Also Gems can be used to buy a restore of health but this is not an option elsewhere.