Offline mode and streaks
I'm going on holiday for two weeks to a rather remote, internet-less Italian villa. Do lessons completed offline also sync a timestamp, so that I might have a chance of keeping my glorious 76-day streak?
I spent a week and a half using offline mode on my iPhone in the cloud forest of Mindo in Ecuador. It can be really wonky so be careful... for example: Sometimes the points don't sync correctly and you end up losing points, occasionally when you're syncing the app will stop using the network and you'll think the lessons are downloaded until you go to use the app offline and find that there are no lessons to enjoy, if you have a slow connection and you try to play through a lesson online occasionally the audio just doesn't download and you'll have to answer questions without it, if you fail the last lesson in a skill it will still mark itself as completed, etc.
To answer your question about the streak, I have a strong feeling that the answer is no because when I sync the app all of my completed lessons marked as having been completed on that day.
fyi: You'll need to resync after about ten lessons in order to download more. Sometimes the app will download more, sometimes less and there's no way to tell which lessons are downloaded until you take it offline so check before you leave your hotspot.
I lost my 130+ day streak while up in the mountains on vacation last month. I didn't think to try in spite of my bad connection, curios too if this works.
I went on vacation and lost my streak even though there was wifi in the hotel. I actually did some lessons but the wifi was pretty bad and didn't upload my results (I'm guessing). I didn't even notice until I got back and my streak was at 0.