The best replacement for esky is walkera.

The best alternatives to esky are rated as following:
★★★★★  walkera
★★  fridge
★★  e-flite
★  eflite
  chilly bin
  ice box

Your alternative for esky is not listed? Suggest!
Speaking about esky, one probably shouldn't forget about realflight.

Other search terms related to esky and their ratings are:
★★★★★ realflight
You have in mind a companion for esky and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of esky in all years. Click on graph for more.
esky
walkera
fridge