>would a person go to the trouble to delete and reinstall to save $1.99.
yes, they will do it for $0.99
>Found this on apple Free Trial The
SKProductDiscountPaymentModeFreeTrial
This is the free trial for an autorenewable.
There is also this from Guideline 3.1.1 for a free trial for non-consumables :
Non-subscription apps may offer a free time-based trial period before presenting a full unlock option by setting up a Non-Consumable IAP item at Price Tier 0 that follows the naming convention: “XX-day Trial.” Prior to the start of the trial, your app must clearly identify its duration, the content or services that will no longer be accessible when the trial ends, and any downstream charges the user would need to pay for full functionality. Learn more about managing content access and the duration of the trial period using Receipts and Device Check.
I have not explored the "Device Check" functionality. But you could check the purchase date in the receipt for this free IAP to avoid a user repurchasing the IAP for for free. Or use the user's key-value file to record the purchase date of this IAP.
Using the user's iCloud key-value file to record the start date of a free trial is quite easy. It is unclear to me the advantage of using the "XX-day Trial" IAP rather than doing it yourself.