One subscription. All your kids. All 6 grades. All subjects. No per-child fees. No surprise add-ons.
50 math + 50 ELA per grade, all Common Core aligned
10 per grade, scaling from 3,000 to 18,000 words
Adjusts difficulty in real time to your child’s level
Real-time progress mapped to Common Core standards
Every child in your household, every grade level
Badges, submarine upgrades, customizable avatars
| Feature | MarineHQ | IXL | Prodigy | Khan Kids |
|---|---|---|---|---|
| Math + Reading integrated | ✓ | Separate | Math only | Separate |
| Story-based learning | ✓ | ✗ | Game-based | Partial |
| Grades covered | 1–6 | K–12 | 1–8 | Pre-K–2 |
| AI-adaptive difficulty | ✓ | ✓ | ✓ | Limited |
| Parent dashboard with standards | ✓ | ✓ | Basic | ✗ |
| Family pricing (all kids) | ✓ | Per child | ✓ | Free |
| No ads to children | ✓ | ✓ | Upsells | ✓ |
| Wrong answers teach | ✓ | ✗ | ✗ | Partial |
| Price (family/month) | $9.99–$14.99 | $19.95+ | $8.33 | Free |
Yes. 7 days of full access with no credit card required. At the end of the trial, you choose whether to subscribe. If you don’t, you simply lose access (but your data is saved for 12 months if you return).
Yes. You can upgrade from monthly to annual at any time and receive a pro-rated credit. You can switch from annual to monthly at the end of your annual term.
You keep full access until the end of your current billing period. Your child’s progress data is preserved for 12 months. There are no cancellation fees. You can resubscribe at any time and pick up right where you left off.
We’re developing a school licensing program. If you’re a teacher or administrator interested in bringing MarineHQ to your school, please contact us at hello@marinehq.com for early access information.