Warp
Yes, Warp is free to play. There are no ads.
You can play the daily puzzle without one, but an account is needed to sync your swatch archive and collection across devices.
A new puzzle is available each day. Turn on the daily reminder in Settings so you don't miss it.
Make sure notifications are enabled for Warp in iOS Settings → Notifications, and that the reminder is turned on inside the app.
Didn't find your answer? Contact support and we'll help.