| Price from | Free | $40/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Plans published | 3 | 1 |
| Spec score · Adaptive Learning Software | 8.3 (#7) | 7.6 (#22) |
| Adaptive learning | Short practice sessions produce learning evidence that AttoLearn uses to guide a learner’s next step. | Primer says future lessons reinforce missed answers and skip material a student already knows. |
| Integrations | The privacy policy says services may include links or integrations with third-party platforms but does not name specific integrations. | Primer lists alignment with Common Core Math and ELA, NGSS, and C3 standards. |
| Purpose | AttoLearn describes itself as a connected platform for learning, assessment and school management for students, families, tutors and tuition centres. | Primer provides a personalized K–12 curriculum that adapts lessons to a student’s interests, answers, and learning needs. |
| Support | The site lists an email contact for support and directs users with subscription access problems to contact the support team. | Each student has a named Primer teacher with an email address, and the site says replies usually arrive within a few minutes. |
