ship ios only with storekit 2 or both stores, solo, 6 weeks of evenings subscriptions

iOS first, and not for revenue reasons. For surface area.

One store, one review process, one set of billing edge cases, one crash reporting story, one device matrix. Android doubles every unknown at the exact moment you have zero information to spend them on, and six weeks of evenings is not six weeks.

The one change I would make to Plan A: use the billing abstraction even while you only ship one store. Not for the billing itself - for the week in four months when adding Android is a week rather than a month.

The review asymmetry matters more than people expect for a first launch. The Play review is usually faster and more forgiving. App Review is slower and can reject you for something you would never have guessed, especially around the paywall, and each round costs days.

If your six weeks includes "and it is live", budget two rejections on iOS and roughly none on Android. That is not an argument for either plan, it is an argument for starting the review process earlier than feels reasonable.

Both stores with Expo is genuinely not much more work than one - the delta is console setup, a second set of store assets, and a real Android device to test on. If you are already in that ecosystem the marginal cost is a weekend rather than a rewrite.

Subscription only with no free tier means your only launch signal is "did anyone pay", on a sample of maybe forty people. Whatever platform you pick, give yourself a way to see activation before the paywall - how many people completed setup, how many logged something on day two - or you will learn nothing from launch on either store.

Ship iOS. Put an email box on the landing page for Android. If two hundred people fill it in you have your answer and it cost you an afternoon.