Pricing
One subscription, every platform, 3 machines. Cancel whenever you like — the app keeps working until the period you have paid for runs out.
Prices are temporarily unavailable. This is our problem rather than yours — try again in a moment, and nothing has gone wrong with any subscription you already have.
What you can do without paying: scan a night, browse and inspect every frame, plate-solve, and use the viewer. Stacking is the part the subscription is for — you can see exactly what you have before deciding whether it is worth it.