Snap Score updates about every 5 minutes after sending a snap, but when viewing someone else's score, updates can take longer, sometimes a few hours, due to Snapchat processing updates in batches to avoid server overload. Additionally, some reports indicate scores update in "sessions" roughly every 8 hours for friends, so a friend's score may only update up to three times a day. The frequency of updates can depend on activity levels, server load, and network conditions. Refreshing the app can sometimes speed up score visibility updates. Overall, Snap Scores update regularly but not always instantly or in real-time.