Can I block WhatsApp, or allow it only at certain times?
Yes to both. Leave WhatsApp off the allowed list to block it. To allow it only at certain times, add it to a window, such as after homework until bedtime. Skie switches the allowed apps by day and time on its own. It does not read the messages.
WhatsApp is often how a child's classmates talk, which makes a flat ban awkward. The usual answer is limits on when, not whether.
In the Skie dashboard you build windows. A window has days, a start time, an end time and a list of allowed apps. A window could run Monday to Friday from six to eight in the evening with books, a calculator and a dictionary, and a second one from eight to nine with WhatsApp added. The first window that matches applies, and a window can run overnight.
The device switches by itself at the set times, even if it is offline, because the rules are stored on the phone. Your child does not need to do anything, and cannot argue with the clock.
What Skie does not do: read the messages, see who your child talks to, or limit WhatsApp to a number of minutes per day. Per-app time limits are not available yet, and the team is working on them.
WhatsApp has its own settings for groups, who can add your child and who sees their profile. Sit with your child and set those together. That is more useful than most filters.
If you decide to block it, expect questions. A time-limited yes at weekends is often easier for a child to accept than a flat no, and it keeps the study window free.