If you tapped "Don't Allow" when just streak first asked, or turned notifications off later, you can switch them back on in your iPhone's settings. The app can't ask a second time on its own.
The quick way
- In just streak, go to Profile › Settings › Notifications.
- If notifications are off, you'll see Notifications are off. Tap Open settings.
- You land in just streak's page in the iPhone Settings app. Tap Notifications and turn on Allow Notifications.
From the iPhone Settings app
- Open Settings › Notifications › just streak.
- Turn on Allow Notifications.
- Make sure Lock Screen, Notification Center and Banners are checked, and Sounds is on if you want to hear them.
Then open just streak once. It notices the change and plans your reminders again right away.
Finally, check that the reminders you want are on in Settings › Notifications inside the app: Daily reminder, Streak at risk, and Weekly recap if you'd like a Sunday summary.
Reminders still not showing up? See My reminders aren't arriving.