BigSIS vs Pillar OS
| BigSIS | Pillar OS | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | $199/mo | — |
| Open source | No | No |
| Platforms | Android, iOS, Web | Web |
| Billing and payments | Yes | Yes |
| Parent portal | Yes | Yes |
| Free plan | — | No |
| Tutor scheduling | — | Yes |
| Attendance tracking | — | Yes |
| Lesson records | — | Yes |
Both are listed in Best Tutoring Center Software. On Samsung Mobile US Press, Pillar OS scores higher on our published basis.