Google Ventures-backed healthcare-on-demand service Doctor on Demand has raised $21m in series A funding to expand its client offerings.

Wildcard has raised $7m in a Softbank-backed series A round to help it provide a new way to browse the web on mobile phones.

Stanford University is supporting the startup through its endowment fund.

OpenSignal, which allows mobile phone users to find the best signal providers in their area, has raised $4m in a Qualcomm and O'Reilly Media-backed series A round.

Satellite-powered data company Spire has secured $25m from a series A round supported by Mitsui and Qihoo 360.

The online manicure booking service has raised $5m in an IDG-led series A round, and will use the funding to expand in its home country of China.