What is claimed is:

1. A method, comprising: at an electronic device including a display device and a first set of sensors: while the electronic device is operating in a first device mode, detecting a change in a first user physical characteristic from a first physical characteristic value to a second physical characteristic value; in response to detecting the change in the first user physical characteristic: in accordance with a determination that the second physical characteristic value satisfies a set of mode change criteria, initiating a process to transition from the first device mode to a second device mode; and in accordance with a determination that the second physical characteristic value does not satisfy a set of mode change criteria, remaining in the first device mode; while the electronic device is operating in the first device mode: receiving first user activity data from the first set of sensors; and subsequent to receiving the first user activity data, displaying a first activity user interface that includes a first activity metric based on the user activity data received from the first set of sensors; and while the electronic device is operating in the second device mode: receiving second user activity data from the first set of sensors; and subsequent to receiving the second user activity data, displaying a second activity user interface that includes a second activity metric, different from the first activity metric, based on the user activity data received from the first set of sensors.

2. The method of claim 1, wherein: the first user physical characteristic is an age of a user associated with the electronic device; the first physical characteristic value is a first age value; and the second physical characteristic is a second age value, greater than the first age value.

3. The method of any one of claims 1-2, wherein initiating the process to transition from the first device mode to the second device mode includes: displaying a first confirmation user interface that includes a first confirmation affordance; receiving an input corresponding to the first confirmation affordance; and in response to receiving the input corresponding to the first confirmation affordance, transitioning from the first device mode to the second device mode.

4. The method of any one of claims 1-3, wherein: detecting the change in a first user physical characteristic from a first physical characteristic value to a second physical characteristic value occurs at a first time; and initiating the process to transition from the first device mode to the second device mode includes transitioning from the first device mode to the second device mode at a second time, later than the first time, that is the next occurrence of a specific time of day after the first time.

5. The method of any one of claims 1-4, wherein initiating the process to transition from the first device mode to the second device mode includes transitioning from the first device mode to the second device mode, the method further comprising: after transitioning from the first device mode to the second device mode, forgoing providing an option to transition from the second device mode to the first device mode.

6. The method of any one of claims 1-5, further comprising: while the device is in a first respective device mode selected from a group consisting of the first device mode and the second device mode, receiving, from an external device, a request to transition a device mode; and in response to receiving the request to transition a device mode, transitioning to a second respective device mode selected from the group consisting of the first device mode and the second device mode, wherein the second respective device mode is different from the first respective device mode.

7. The method of any one of claims 1-5, further comprising: while the device is in a third respective device mode selected from a group consisting of the first device mode and the second device mode, receiving, from a second external device, a second request to transition a device mode; in response to receiving the second request to transition a device mode, displaying a second confirmation user interface that includes a second confirmation affordance and a first rejection affordance; while displaying the second confirmation user interface, receiving a first input; and in response to receiving the first input: in accordance with a determination that the first input corresponds to the second confirmation affordance, transitioning to a second respective device mode selected from the group consisting of the first device mode and the second device mode, wherein the third respective device mode is different than the fourth respective device mode; and in accordance with a determination that the first input corresponds to the first rejection affordance, remaining in the third respective device mode.

8. The method of any one of claims 1-5, wherein the electronic device includes an input device, the method further comprising: while the device is in a fifth respective device mode selected from a group consisting of the first device mode and the second device mode, receiving, via the input device, a third request to transition a device mode; and in response to receiving the third request to transition a device mode, transitioning to a sixth respective device mode selected from the group consisting of the first device mode and the second device mode, wherein the sixth respective device mode is different than the fifth respective device mode.

9. The method of any one of claims 1-8, further comprising: while the electronic device is operating in the first device mode: displaying a first physical activity tracking user interface that includes a first set of one or more activity tracking affordances that includes a first activity tracking affordance that, when selected, initiates a first activity tracking function; and while the electronic device is operating in the second device mode: displaying a second physical activity tracking user interface that includes a second set of one or more activity tracking affordances that includes the first activity tracking affordance and a second activity tracking affordance that, when selected, initiates a second activity tracking function, wherein the second activity tracking affordance is not included in the first physical activity tracking user interface.

10. The method of any one of claims 1-9 further comprising: while the electronic device is operating in the first device mode: displaying a first settings user interface that includes a first set of one or more settings affordances that includes a first setting affordance that, when selected, alters a first setting; and while the electronic device is operating in the second device mode: displaying a second settings user interface that includes a second set of one or more settings affordances that includes the first setting affordance and a second setting affordance that, when selected, alters a second setting, wherein the second setting affordance is not included in the first settings user interface.

11. The method of any one of claims 1-10, wherein the first activity metric is a time-based activity metric.

12. The method of any one of claims 1-11, wherein the second activity metric is an energy- based activity metric.

13. The method of any one of claims 1-12, wherein displaying the first activity user interface includes displaying a first activity goal for the first activity metric, the first activity goal having a first value, the method further including: while displaying the first activity goal for the first activity metric, receiving a first set of one or more inputs; and in response to receiving the first set of one or more inputs: displaying a second instance of the first activity user interface that includes a second activity goal for the first activity metric, the second activity goal having a second value different from the first value of the first activity goal.

14. A non-transitory computer-readable storage medium storing one or more programs configured to be executed by one or more processors of an electronic device with a display device and a first set of sensors, the one or more programs including instructions for performing the method of any of claims 1-13.

15. An electronic device, comprising: a display device; a first set of sensors one or more processors; and memory storing one or more programs configured to be executed by the one or more processors, the one or more programs including instructions for performing the method of any of claims 1-13.

16. An electronic device, comprising: a display device; a first set of sensors; and means for performing the method of any of claims 1-13.

17. A non-transitory computer-readable storage medium storing one or more programs configured to be executed by one or more processors of an electronic device with a display device and a first set of sensors, the one or more programs including instructions for: while the electronic device is operating in a first device mode, detecting a change in a first user physical characteristic from a first physical characteristic value to a second physical characteristic value; in response to detecting the change in the first user physical characteristic: in accordance with a determination that the second physical characteristic value satisfies a set of mode change criteria, initiating a process to transition from the first device mode to a second device mode; and in accordance with a determination that the second physical characteristic value does not satisfy a set of mode change criteria, remaining in the first device mode; while the electronic device is operating in the first device mode: receiving first user activity data from the first set of sensors; and subsequent to receiving the first user activity data, displaying a first activity user interface that includes a first activity metric based on the user activity data received from the first set of sensors; and while the electronic device is operating in the second device mode: receiving second user activity data from the first set of sensors; and subsequent to receiving the second user activity data, displaying a second activity user interface that includes a second activity metric, different from the first activity metric, based on the user activity data received from the first set of sensors.

18. An electronic device, comprising: a display device; a first set of sensors; one or more processors; and memory storing one or more programs configured to be executed by the one or more processors, the one or more programs including instructions for: while the electronic device is operating in a first device mode, detecting a change in a first user physical characteristic from a first physical characteristic value to a second physical characteristic value; in response to detecting the change in the first user physical characteristic: in accordance with a determination that the second physical characteristic value satisfies a set of mode change criteria, initiating a process to transition from the first device mode to a second device mode; and in accordance with a determination that the second physical characteristic value does not satisfy a set of mode change criteria, remaining in the first device mode; while the electronic device is operating in the first device mode: receiving first user activity data from the first set of sensors; and subsequent to receiving the first user activity data, displaying a first activity user interface that includes a first activity metric based on the user activity data received from the first set of sensors; and while the electronic device is operating in the second device mode: receiving second user activity data from the first set of sensors; and subsequent to receiving the second user activity data, displaying a second activity user interface that includes a second activity metric, different from the first activity metric, based on the user activity data received from the first set of sensors.

19. An electronic device, comprising: a display device; a first set of sensors; means, while the electronic device is operating in a first device mode, for detecting a change in a first user physical characteristic from a first physical characteristic value to a second physical characteristic value; means, responsive to detecting the change in the first user physical characteristic, for: in accordance with a determination that the second physical characteristic value satisfies a set of mode change criteria, initiating a process to transition from the first device mode to a second device mode; and in accordance with a determination that the second physical characteristic value does not satisfy a set of mode change criteria, remaining in the first device mode; means, while the electronic device is operating in the first device mode, for: receiving first user activity data from the first set of sensors; subsequent to receiving the first user activity data, displaying a first activity user interface that includes a first activity metric based on the user activity data received from the first set of sensors; and means, while the electronic device is operating in the second device mode, for: receiving second user activity data from the first set of sensors; and subsequent to receiving the second user activity data, displaying a second activity user interface that includes a second activity metric, different from the first activity metric, based on the user activity data received from the first set of sensors.

20. A method comprising: at a first electronic device including a display device: receiving user activity data; and subsequent to receiving the user activity data and in accordance with a determination that the user activity data satisfies a first set of activity commentary display criteria, displaying, via the display device, a first user interface, including: in accordance with a determination that a value of a user characteristic satisfies a set of first commentary criteria, a first activity commentary based on the user activity data; and in accordance with a determination that the value of the user characteristic satisfies a set of second commentary criteria, a second activity commentary based on the user activity data, the second activity commentary different from the first commentary.

21. The method of claim 20, wherein the user characteristic is an age of a user associated with the electronic device.

22. The method of any one of claims 20-21, further comprising: after displaying the first activity commentary, receiving second user activity data; and subsequent to receiving the second user activity data: in accordance with a determination that a second set of activity display criteria is satisfied, the second set of activity display criteria including a criterion that is satisfied when the current time is not within a predetermined period of time, displaying a third activity commentary based on the second user activity data; and in accordance with a determination that the second set of activity display criteria is not satisfied, forgoing displaying the third activity commentary based on the second user activity data.

23. The method of any one of claims 20-22, wherein: the first activity commentary has a first length; and the second activity commentary has a second length that is greater than the first length.

24. The method of any one of claims 20-23, wherein the first activity commentary: in accordance with the value of the user characteristic being within a first predetermined range, includes a graphical element based on the user activity data; and in accordance with the value of the user characteristic not being within the first predetermined range, does not include a graphical element based on the user activity data.

25. The method of any one of claims 20-24, further comprising: receiving, from an external device, third user activity data; and in response to receiving the third user activity data, displaying a first response user interface that includes: in accordance with a determination that the value of the user characteristic satisfies a set of first response criteria, a first set of one or more response comment affordances that includes a first response comment affordance that, when selected, causes transmission of a first response comment to the external device; and in accordance with a determination that the value of the user characteristic satisfies a set of second response criteria, a second set of one or more response comment affordances that includes a second response comment affordance that, when selected, causes transmission of a second response comment to the external device, wherein the first set of one or more response comment affordances is different than the second set of one or more response comment affordances.

26. The method of any of claims 20-25, further comprising: prior to receiving the user activity data, receiving the value of the user characteristic via a user input.

27. The method of any of claims 20-26, wherein the value of the user characteristic is selected from the group consisting of age, a highest level education of a user, a standardized test result achieved by the user, an option selected by the user, and any combination thereof.

28. A non-transitory computer-readable storage medium storing one or more programs configured to be executed by one or more processors of at first electronic device that includes a display device, the one or more programs including instructions for performing the method of any of claims 20-27.

29. A first electronic device, comprising: a display device; one or more processors; and memory storing one or more programs configured to be executed by the one or more processors, the one or more programs including instructions for performing the method of any of claims 20-27.

30. A first electronic device, comprising: a display device; and means for performing the method of any of claims 20-27.

31. A non-transitory computer-readable storage medium storing one or more programs configured to be executed by one or more processors of a first electronic device that includes a display device, the one or more programs including instructions for: receiving user activity data; and subsequent to receiving the user activity data and in accordance with a determination that the user activity data satisfies a first set of activity commentary display criteria, displaying, via the display device, a first user interface, including: 102 in accordance with a determination that a value of a user characteristic satisfies a set of first commentary criteria, a first activity commentary based on the user activity data; and in accordance with a determination that the value of the user characteristic satisfies a set of second commentary criteria, a second activity commentary based on the user activity data, the second activity commentary different from the first commentary.

32. A first electronic device, comprising: a display device; one or more processors; and memory storing one or more programs configured to be executed by the one or more processors, the one or more programs including instructions for: receiving user activity data; and subsequent to receiving the user activity data and in accordance with a determination that the user activity data satisfies a first set of activity commentary display criteria, displaying, via the display device, a first user interface, including: in accordance with a determination that a value of a user characteristic satisfies a set of first commentary criteria, a first activity commentary based on the user activity data; and in accordance with a determination that the value of the user characteristic satisfies a set of second commentary criteria, a second activity commentary based on the user activity data, the second activity commentary different from the first commentary.

33. A first electronic device, comprising: a display device; means for receiving user activity data; and means, subsequent to receiving the user activity data and in accordance with a determination that the user activity data satisfies a first set of activity commentary display criteria, for displaying, via the display device, a first user interface, including: in accordance with a determination that a value of a user characteristic satisfies a set of first commentary criteria, a first activity commentary based on the user activity data; and in accordance with a determination that the value of the user characteristic satisfies a set of second commentary criteria, a second activity commentary based on the user activity data, the second activity commentary different from the first commentary.