Achievements are automatically generated by your swim data. Achievements include your best times (personal records), distances swum, and movement on leaderboards. If you achieved a new personal record or passed someone on a club or pool leaderboard, they will be noted on the individual swim in which you reached that achievement and also on your main achievements page . As more swims are added by both you and your connections, certain achievements will change. For example if on your next swim you set a new personal best for your fastest 50 meters, that achievement would disappear from the old swim and appear on your new one.