How much does Spanbox cost?

Free for 3 apps, with no account. Pro is $4.99/mo or $59.88/yr for unlimited apps. There's also a one-time Lifetime at $129 (usually $199) that never renews, plus a custom Enterprise plan for teams. So it ranges from completely free up to a single one-off payment, depending on how many apps you run.

For most people it's either free (3 apps) or the one-time Lifetime. The monthly is there if you'd rather not pay upfront.