Vape Assistant is a free Android app designed to assist vapers with a range of useful tools. The app features a DIY eliquid calculator that allows users to calculate the required ratio of PG/VG/AD and nicotine in the final liquid. Users can choose the strength of nicotine base and content of PG/VG/AD in it, and add an unlimited number of flavors to the recipe as a percentage or drops.

Additionally, the app offers a diluent tool that allows users to mix different bases, and find out the necessary amount of nicotine, e-liquid, etc. Ohm's law is also included, which allows for easy calculation of amperage, power, voltage, and resistance in a couple of clicks. The battery life feature allows users to find out the number of possible puffs and the continuous operation of the battery. Lastly, the expenses feature allows users to keep track of how many days they did not smoke, the amount of not spent money, and track expenses on vape.