Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to earn money working out [title] Use fitcoin to earn bitcoins by working out. [step] The fitcoin mobile app is synchronized with fitness trackers. Your fitness tracker will send your exercise data such as heart rate and duration of activity to the fitcoin app.

Ending1: [substeps] Once you reach the fitness tracker, you will be able to hop on your clothes and become fitcoin's mobile fitness tracker. You can set to focus your fitcoin by keeping fitness trackers on your skin. Ending2: Once you attend a fitness tracker session, your fitness tracker will automatically connect you with a tracker attached to your fitness tracker. This will allow you to see-and access-the promotion trends ranging from the support you receive from the fitcoin app. Ending3: The fitcoin app converts this exercise data into a number for the total energy you spent exercising, which is then converted into the bitcoin currency. [substeps] You can spend your bitcoins at online retailers that accept this currency. Ending4: After using the app, make sure to schedule regular days and remove the tracker during the day if you lose track of yourself. [substeps] Launch fitcoin app, then tap on " account.

Answer format: ending1/ending2/ending3/ending4