The Mobile 4 Reproductive Health (m4RH) toolkit provides information and tips from FHI 360’s work in mobile technology for health over several years and is intended to share lessons learned as well as facilitate replication of this SMS-based family planning and reproductive health information service. The toolkit includes an overview of m4RH, recent demographic and use data gathered through routine system use and from several studies, sample messages, costing data and a description of message development and adaptation process.