Dioma operates on a paid subscription model with three payment cycles: monthly, quarterly, and annual. We reward long-term commitment because language learning requires sustained effort over months or years, not weeks.
We don't offer a free tier, but provide a 7-day trial with full platform access and a 30-day money-back guarantee to ensure the platform fits your learning needs before you commit.
Subscription options:
Monthly: $29/month
Billed monthly. Cancel anytime. Best for learners testing their consistency or with short-term goals.
Quarterly: $60/quarter
Billed every three months. Best for learners committing to a specific milestone (exam etc.)
Annual: $156/year
Billed once per year. Best for learners working toward a full level increase (e.g., B1 to B2).
Upgrading subscriptions:
If you start with a monthly subscription and decide to upgrade to quarterly or annual, your first month's payment is credited toward the longer subscription. You pay only the prorated difference.
7-day free trial:
Your trial includes full access to all features: personalized curriculum, speaking and writing exercises, correction feedback, and progress tracking. No feature restrictions, no payment required upfront.
Your trial begins when you create your account and complete the initial setup. We do not require payment information to start your trial.
30-day money-back guarantee:
If Dioma isn't the right fit, request a full refund within 30 days of your first payment. Email help@dioma.com, no questions asked, no justification required.
This applies to your first subscription payment only. If you're on a monthly plan and renew for a second month, the guarantee no longer applies.
Why no free tier:
We built Dioma to solve a real problem: the lack of structured, feedback-driven curricula for intermediate and advanced learners. Creating that requires paying expert curriculum designers, linguists, and teachers fairly, maintaining high-quality correction systems, and delivering the platform without ads or data monetization.
A free tier would require either:
Ads - which disrupt learning and compromise the user experience
Usage limitations - which degrade the curriculum's effectiveness by restricting access to essential features like corrections or speaking practice
Data monetization - which we fundamentally oppose
We chose accessible pricing with a robust trial and guarantee instead. This model lets us build the platform serious learners deserve without compromising on quality or treating users as a product.
Our pricing philosophy:
Language learning from B1 to C1 takes years of consistent effort. We designed our pricing to support that journey, not to extract maximum revenue from short-term users. The longer you commit, the more we discount, because long-term learners are who we built this for.
How to manage your subscription:
View your current plan, payment history, and renewal date in Settings > Billing
Change your subscription tier anytime (upgrades are prorated, downgrades take effect at the next billing cycle)
Cancel anytime, you'll retain access through the end of your current billing period
Dioma is built for learners who've outgrown the basics. Structured curriculum, smart feedback, real progress. Try it free for 7 days.