It definitely works to do waypoints and I would agree with user "Poletramp" review. I think Litchi App could outright replace the stock DJI Go 4 app, if you don't mind losing the modes DJI created (I hardly use them). I would say keep the DJI app as it seems Litchi App lacks the ability to do some of the setup/configuration such as Compass or check the WiFi interference.
Generally missions are setup ahead of time in the Mission Hub (before I leave the house) and I later do adjust them from the app on site as necessary (as location can change from what the SATs captured and show in hub). I further recommend the Virtual Litchi Mission (if you're a PC user) if not at minimum export as KML and view in Google Earth (although not necessarily 100%, as I've connected with Litchi Support and they said it's never going to be 100% and leave extra room as a safety precaution) ((as I did have a bad crash, which was a result of a software flaw which they say they have corrected)) that said, I do trust Litchi and recommend them as they were very responsive to my emails with quick follow up and helpful support.
Some claim iOS is better, but I am comparing to another person I fly with who has that version and it's basically the same in my opinion with some differences in the UI appearance. Functionality is pretty much the same. (They're using the iOS beta) I do think that there's interference when I am near the other user who is using their Spark, so I don't stand directly with them (usually a few meters apart and the experience improves)
I continually update my firmware as new ones become available, including my phone's OS (generally I am flying on a Samsung S5 rooted and running LineageOs 15) I have found that it very much is important to have high quality OTG cable and wire (Dollarama stuff won't cut it and will lead to disconnections) I've never experienced any flyaways (Although Litchi help says OTG isn't supported, on Android it definitely works, I think they're behind in updating their help section on the website)
I am located in Canada and am not effected by European laws, so my Spark can transmit at the highest frequency (but I don't play around with hacking or modding) (as "Poletramp" says, you can load up DJI Mod App which will allow you to adjust the modes between CE/FCC).
I believe the $32 that the Litchi App cost is well worth it even if it's just used for the purpose of Waypoint missions. Of course Litchi can do more than just Waypoints. Compared to other apps such as Reds Waypoints (trashy app) or another option (which works, but is super simple/lacking, although free) "DJI Mission" (find in Play Store) Litchi truly is the way to go. It's polished, looks go, and you can go from the DJI app to Litchi with very minimal learning curve as they're quite similar. Buy it buddy!
