Hi John, thank you for you message.  There are not any apps which enable you to save and earn money for travel with friends ...  we have done a lot of research.  Here is a section taken from our whitepaper:

Based on several statistics, (also outlined in our white paper), there is a constant rise in revenue generation within the travel and tourism market. However, a significant number of people who want to travel can barely afford the travel expenses. Airsave Travel was created to solve the problem for this set of people, providing them with a means to save and earn for travel using a cryptocurrency-based blockchain platform.

Currently, there is no other company offering any social travel saving service like Airsave Travel. This means that this is a unique offering and one which will prove attractive to a broad market of aspiring travellers.

As Airsave Travel makes use of existing social networks to grow its user base, we believe that there is a risk of one of the larger companies producing a competing service. However, the business models of Facebook and similar services are built around the acquisition of competitors, as demonstrated by their purchase of WhatsApp for $19bn and Instagram for $1bn. As such, competition from larger companies may present an opportunity for an extremely lucrative merger or acquisition.

We do also leverage a strategic partnership with the global travel company STA Travel (www.statravel.com), so that users can receive a portion of savings and earnings in travel vouchers and cryptocurrency.