Thermochronology is a dating method that measures the time since minerals cooled below a given temperature within the Earth, typically between 50–400 °C. Geoscientists often use thermochronology to measure how fast processes related to plate tectonics or erosion occur over timescales of millions of years. A challenge, however, is that many different temperature histories can produce the same age. In this work we introduce new software for using thermochronology to study geological processes.