A traveller security application has been launched for the iPhone.
Trafficmaster's International Rescue app is already available for Blackberries and Windows-based smartphones.
The service costs £20 a month, or £65 for an annual subscription.
In an emergency situation an iPhone owners can use the app to call a contact centre.
The company's chief executive, Tony Eales, said emergency teams - who are based around the world - provide a liaison between the traveller and the British Embassy, police, border controls and emergency services (such as fire brigade, mountain rescue, coast guard or paramedics).
Calls to the contact centre from the iPhone are charged at a normal UK landline rate, no matter where the call is made from.
Eales said: "The service offers peace of mind, security and local knowledge to all travellers, whether you are a business man, a family on holiday or a student on a gap year."
The company confidentially stores all the traveller's personal information such as next of kin, passport number, blood group, allergies, current medication and insurance details.
The app also includes a concierge service.
Similar to the emergency assistance teams, information about restaurants, hotels, chemists or cash machines can be sought.
Meanwhile, business travellers in the UK have hailed smartphones as the most important gadget created during the first decade of the noughties, according to a survey.
Chauffeur company, Driven Worldwide, asked its clients to identify which invention had made their working lives more efficient.
More than half said their Blackberry or iPhone.