How do you make an iPhone app that doesn't cannibalize its original business: an address and phone lookup service that earns its money on incoming calls?
- Forced registration + pay-per-use
- Forced re-installation (+payment) after a set number of successful uses
- Forced registration after a set number of successful uses
Have a little brainstorming session and you will likely come up with a plethora of other possible implementation schemes... =)