请专家推荐手机app制作公司

老板让我找一个制作手机app公司，为学校制作一个app. 对此，我是外行。当地的一家公司的报价如下：

There are two pieces to the pricing of designing, building, and deploying native apps. These are: Design/Build/Deploy and Content Management/Support/Hosting. We build apps for three platforms: iPhone, iPad, and Android. The base pricing for any one of these platforms is $2495 Design/Build/ Deploy and $95/month CM/Support/Host. For each additional platform that is built alongside the first the cost is just an additional $500 to Design/Build/Deploy and $50/month for CM/Support/Host.

请内行给看看，这个价是否靠谱？此CM/Support/Host monthly fee是必须的吗？有没有业内声誉好的公司，请各位专家推荐几个？

谢谢！