Company Blynk Inc created these great apps:
Blynk - IoT for Arduino, ESP32, Blynk myPlant, MyBrewbot, AgriNett, Fetzer Automation, Celsifi, JustFire @home, ESPproMon, 3XE, Modela IoT, BedCooler, PLAATO, CSRU Viewer, untrol.io, Cutting Edge Power, EasiTemp, 40two Data, Ho-SaKU, Gathor Fx, Mongards, MyBrewbot II, Valar, MWLR INFILTROMETER, Birkits, VERDMO, Warmboard, AutoGen, Variance Design, +more, Blynk IoT, and others..