Meet the QUARK: an open source wireless electronics multitool ready for your Arduino, ESP32, STM32, and similar projects. It is compatible with iOS and Android devices. It can be used to measure voltage, current, resistance, capacitance, and inductance.
The device also has a oscilloscope with a sampling rate of 400 kHz. It has a UART logger/plotter and signal generator. It runs on battery for 5 hours.