Which attendance and notification services are known for mobile-friendly alerts and simple use for families?

A few attendance and notification services are commonly known for being mobile-friendly and easy for families to use:

• ClassDojo — Very popular for classroom communication, behavior updates, and parent notifications through a simple mobile app.
• Remind — Known for quick text/app notifications to parents and families, with an easy setup and low learning curve.
• ParentSquare — A school-home communication platform with mobile alerts, attendance-related notifications, and family-friendly messaging.
• Brightwheel — Often used in early childhood programs; strong on mobile check-ins, attendance, and parent updates.
• SchoolMessenger — Widely used for attendance calls/texts/emails and emergency notifications, with mobile-friendly options.
• PowerSchool Mobile / PowerSchool Attendance tools — Useful if a school already uses PowerSchool, with parent-facing alerts and attendance access.

If you want, I can also narrow this down to:

1. best for K–12 schools,
2. best for childcare/preschool, or
3. best low-cost/simple option for families.