Yes, absolutely (we're users ourselves and know this is an essential "feature" for any service), and you're very welcome! You can:

1. Subscribe to the Starter Plan, which will be really free forever. It has limited features, e.g. sales history goes back an year only, but it's great for small software developers with few apps or for bigger developers that want to try out Mopapp for a period longer than the usual trials.
2. After signing up to the Starter Plan, you can try out our Pro or Enterprise plan subscribing to a 15-day free trial. In this period you'll be able to do everything: track sales for many applications and use the most advanced charts and features, so that you can really see what Mopapp can do for you. We will ask you for credit card details but will not charge you. At the end of the trial period, you can simply keep the plan you tried, or downgrade to the Free Plan again. Only if you decide to keep using the trial plan we will charge you the monthly amount. Your choice, no questions, no strings attached.