# Success rate

Success rate, in a number marketplace, is the share of recent activations for an app and country that received the SMS; it is the best predictor of whether your next number will work.

## What is Success rate?

Success rate, in a number marketplace, is the share of recent activations for an app and country that received the SMS; it is the best predictor of whether your next number will work.

## How SMS Nitro computes it

From delivered versus expired activations over the last hours, per app and country. It is shown before purchase so you can pick the country that is working now.

Source: https://smsnitro.com/glossary/success-rate