Tonic

Tonic develops digital platforms, such as web and mobile applications. The job it does: designing and building iOS and Android apps.

The natural audience is businesses launching or rebuilding an app. Alongside the main category they mention Mobile Apps. As a small company team themselves (11 to 50 people), they tend to serve customers of a similar scale best. You will probably talk to the people who build it, which is great until you need 24/7 support.

Tonic is based in Denver, Colorado. Their site is hellotonic.com.

Things worth asking about: portfolio quality, app store experience, and maintenance terms. Ask for a trial on your own data, not a canned demo.

If you have worked with Tonic, tell the next buyer what you paid and what surprised you. That is the part of this page we cannot write.