AppSheet automatically integrates a number of external services that are used in apps. Some of the commonly used external services are:
email in workflow rules
SMS in workflow rules
PDF conversion in workflow rules
address geocoding (converting street addresses to lat-long locations that can be shown on a map)
mapping via Google Maps
MixPanel for usage tracking
Each such external service is a paid service that charges AppSheet based on usage. However, AppSheet makes these services available out-of-the-box seamlessly to all our users. In rare situations, an AppSheet account may have excessive use of one of these services. In these situations, AppSheet will apply usage limits to the account and provide reasonable alternatives.