You paid what, £1? £2? Ten years back, and you're bugged about the ability to pay a charge of £1 (currently £0.39 for me) for more features, that is completely optional, despite you still having a fully functional player that has improved heaps since you first paid for it?
Most software these days are charging 10-100x what you paid, for a yearly license.
I don't understand why people seem to have such a delusion around the value of mobile apps.