I am afraid that the NRE (engineering costs) for apps would be huge compared to the income generated from any app sales, hence apps would not be a good investment of capital at this time… hopefully Magnets (I wish that CtC would change both the name and color, but I’m buying mine anyway) will develop an ecosystem where others will work along the lines that you suggest and eventually develop apps.
I suspect that hundreds of thousands of Magnets must be sold along with robust continuing sales before somebody will write the first app, but we will see…