From your initial followers, your final followers, and an optional number of periods, calculates the absolute growth, the percent growth, and the average growth per period. If initial followers is 0, the percentage isn't calculated (avoiding a division by zero) and a clear "not calculable" state is shown instead of a misleading 0%.
All data comes from you. This tool never queries Instagram, TikTok, or any other platform.
The content is processed on your device and is never uploaded to the server.