We understand that it may be confusing, but as our Android and iOS apps are free to use, SpamDrain is a cloud service that you pay a small yearly fee for. Our satisfied customers can assure you that it's worth every penny. Just give us 14 days and the decide for yourself if you want to continue. If not - don't worry - simply remove your account or just let it expire. We won't bother you again. Thanks for letting us prove our worth!
Keeping SpamDrain a paid-for service also keeps us from having to bother you with ads and sell your personal details which so many other do these days.