Right now the model is free. We limit it to 20K hits per day. If you need more than that, ping us and we can help out (api at geoapi.com)
Will you charge in the future? Will there always be a free plan with a limited number of hits?
There will always be a free plan with a relatively reasonable volume - at minimum, it will always be a 'fremium' kind of thing. At which point we start charging is, frankly, to ensure that we can at least cover serving costs.