Paris-based KelDoc, an doctor appointment booking app, raised $1.4 million (1 million euros) from existing investor Alven Capital and other angel investors, according to a report from TechCrunch. This brings the company's total funding to about $2 million.

Keldoc plans to use these funds to expand across major cities in Europe. Currently, the service is only offered in France.

With KelDoc's app, which is available on iOS devices, consumers can search for doctors and dentists based on their specialty and location. After that, patients can view a doctor's schedule and book appointments. Patients can also see other information including the physician's rates and available payment methods. Before the visit, KelDoc sends users a text reminding them of the appointment.

TechCrunch added that while the service is free for patients, doctors pay $270 (€200) per month to use KelDoc.

The company, which was founded in 2012, raised another round of funding, at least $950,000 (700,000 euros), in April 2013 from Alven Capital.

Another appointment booking company, ZocDoc, recently made news when it announced it was working on raising an additional $152 million, valued at $1.6 billion. ZocDoc not only offers appointment booking, but since October 2012, the company has also offered a check-in feature so that patients can send over a basic medical history before they arrive instead of filling out the medical history clipboard.

In March, ZocDoc announced plans to make its service available in all 48 contiguous states by the end of 2014.