1. A computer-implemented method to provide a contextual message in relation to detecting a potential scam, comprising: monitoring, by a processor, an application executing on a computing device; detecting, by the processor, the application requesting a user to enter a mobile telephone number in a data field of the application; identifying, by the processor, a subscription to a service associated with the application requesting the user to enter the mobile telephone number, the application being configured to subscribe the user to the service via the user submitting the mobile telephone number; obtaining, by the processor, information regarding the service, the information including at least one of a contractual term associated with the subscription and contact information associated with an entity providing the service; determining, by the processor, reputation information for the service provided by the application based on obtaining the information regarding the service; classifying, by the processor, the application as a potential scam based at least in part on the identified subscription and the reputation information; generating a first informational message regarding the service based on the reputation information; and displaying the first informational message.