I'm really just posting this in hopes that it helps someone in a similar situation in the future.
Long story short, I ended up removing my Atomi smart space heater (AT1481) from the Atomi smart app while attempting to troubleshoot time zones. This was a problem because Atomi removed the heaters from the app entirely when the recall went out. No amount of installing old APKs would allow me to add the heater back to the app. I tried using other apps like SmartLife to add it back through their interface, but no luck. The one thing I actually needed from the app was to set a schedule for it to automatically turn on and off. Well, it turns out that this model doesn't have modern safety mechanisms that require you to manually turn the heater back on when the power goes out and comes back on (I wouldn't be surprised if this was part of the reason for the recall, and not just the smart functions). If you use a smart plug, you can actually set a schedule to turn the heater off and on and it will retain all the previous settings and resume heating. Other settings will still require you to manually set them on the heater, but this allowed me to solve the one need that I personally had. I hope someday it can help others too!
Disclaimer: Running a space heater unattended can be very dangerous! Do not do this if you are concerned about children or pets knocking the heater or something else over that can create a fire hazard!