Attendance Check for trainers and teachers. Create groups with members and track attendance creating and editing trainings.

Full functionality list:
- Creating groups with training schedules
- Importing group members from phone book
- Adding group members manually
- Calling/Texting group members
- Removing group members
- Removing groups
- Editing group name and its schedule
- Adding trainings - attendance check
- Editing trainings
- Removing trainings