Looking forward to adding a Tello to my fleet! Perhaps DJI can answer me if my Crystal Sky will be compatible.? I hope the app is android/ios for most peoples phones.
5 MP stills are acceptable for a lot of (selfie) shots.

Thanks for your attention. Please contact the support of Tello for better assistance: https://www.ryzerobotics.com/. Thanks for your understanding.

It should work on the CS if you can side load the Tello  android app and get it to run
https://apkpure.com/tello/com.ryzerobotics.tello

I would like to see how the Tello stacks up against the Spark. I know that you can't expect much for a $100 drone, but would still like to know a DJI users initial thoughts. If it's reliable it would be a great starter drone to get my neice and nephews.

It can certainly be as good as the spark (without RC)
Except those brushed motors

Good news! This product is now available to order at the DJI Online Store.

Be aware that only limited quantities are available and orders will be processed on a first-come, first-served basis. So hurry and click the link above to buy now!

If this product happens to be sold out already, ask for another availability reminder email on the product’s webpage, and we’ll be sure to get in touch.

If you have any questions, please contact us.

Sincerely,
DJI

Re  my previous post, I have apk side loaded tello ap onto Crystal Sky, and it' all OK except video is only black and white.
Photos are captured in colour.  Probably end of the road for that idea.

apknite.com/com.ryzerobotics.tello

Looks like a very fun drone to fly