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# subscriptionPeriod

An object that defines the period for the product discount.

```
var subscriptionPeriod: SKProductSubscriptionPeriod { get }
```

## Discussion

This object represents the duration of a single subscription period. A period is described as a number of units, where a unit can be a [`SKProduct.PeriodUnit.day`](/documentation/StoreKit/SKProduct/PeriodUnit/day), [`SKProduct.PeriodUnit.month`](/documentation/StoreKit/SKProduct/PeriodUnit/month), [`SKProduct.PeriodUnit.week`](/documentation/StoreKit/SKProduct/PeriodUnit/week), or [`SKProduct.PeriodUnit.year`](/documentation/StoreKit/SKProduct/PeriodUnit/year).

To calculate the total amount of time that the discount price is available to the user, multiply the [`subscriptionPeriod`](/documentation/StoreKit/SKProductDiscount/subscriptionPeriod) by [`numberOfPeriods`](/documentation/StoreKit/SKProductDiscount/numberOfPeriods).

> Note:
> The subscription period for the discount is independent of the product’s regular subscription period, and does not have to match in units or duration.

---

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