You deleted the apps and he ghosted a week later: what to do

When someone goes quiet right after you both left the apps, the usual cause is that the conversation was running on the apps' momentum. Without the notifications, the easy thing to do is nothing. He may not be ignoring you so much as not thinking about you enough to reach out. That is a different problem from being rejected, and it means the fix is to give him a reason to come back, not to prove you're still interested.

Read how the silence started. If his last message was warm and forward-looking, the gap is probably logistics or inertia. If the last exchange had any friction, or he stopped replying mid-conversation, take the silence more seriously and expect less. Either way, one message is enough to find out. A second message in the same week tells you almost nothing new.

The first job of a reply is to make it easy for him to respond without having to explain anything. Refer to something specific from the last real conversation, so he remembers why the connection was there. Keep it light enough that a one-line answer is a comfortable option for him.

The second job is to show your life is moving without you. A small detail about something you've been doing this week is enough. It lets him see that you are not sitting by the phone, and that you are someone with plans he might want to join. Avoid anything that reads as checking up on him, and avoid making the message about the gap itself. Your reply should be about the thing you both talked about, not about the silence.

Send your message in the middle of a normal day, roughly when you'd text a friend, not late at night or first thing in the morning. Late messages after a silence read as wanting something urgently, and early ones can look like you were waiting. Mid-afternoon on a weekday is usually safe.

Give it three to four days before you do anything else. If he replies, match his energy and keep the next step concrete, like a specific day or plan, so you don't end up in another open-ended conversation that fades out. If he doesn't reply, leave it. One unanswered message is a normal outcome after a quiet week. Send nothing else for at least another two weeks. If he comes back after that, meet the message on its merits. If he doesn't, stop, and put your attention on people who did reply.