Terms of Service

Last updated: September 26, 2026 (draft)

Thank you for using Mirimi ("the service"). These terms set out the agreement between you and the operator of the service ("we", "us"). Please read them before you start.

Operator details

• Legal / trading name: ITERIA (이터리아), represented by Jinwook Choi
• E-mail: support@iterialab.com
• Address: Room 310, College of Business Administration and Economics, 70 Hannam-ro, Daedeok-gu, Daejeon 34430, Republic of Korea

These three fields are placeholders. They will be filled in with real details once business registration is complete.

1. What the service does

Mirimi turns study material you already own into practice questions using AI, schedules the reviews for you, and reminds you on your device when it is time to study.

2. Definitions

• You: the person who accepts these terms and uses the service.
• Study material: the text extracted on your device from a PDF, PowerPoint or Word file you choose. The original file is never uploaded.
• Questions: the questions, options, answers, explanations and short source excerpts that AI generates from your material, including questions that Pro's "Go beyond the material" builds from your material's topic.
• Free plan: the plan you use without paying. An ad may appear after you finish a session, and some features, such as extra practice (more quizzes, Speed O/X, matching), may have a daily limit (shown on the plans screen in the app). Today's review, wrong-answer retries and cards can be used without a count limit.
• Pro: the tier with higher limits on materials and question generation, no ads, and rewards. You get it with a paid subscription, and sometimes through a free trial or the launch offer.
• Points (rewards): an in-app credit earned by studying while you use Pro. It can be used only to push back the next billing date of your paid subscription (free days) and has no cash value. The details are in the Rewards Rules.

3. Changes to these terms

These terms are always available in the app under "Me → Settings → Terms & Privacy" and on our website.

We may update them within the limits of the law. We will announce the change and its effective date in the app at least 7 days in advance, or at least 30 days in advance if the change is to your disadvantage. For such changes we will ask you to accept the new version; if you do not want to, you can stop using the service and delete your account.

4. Your account

• You must be at least 14 years old. If we learn that an account belongs to someone younger, we delete it and the data attached to it.
• You can sign up with an e-mail address and password, or sign in with Google.
• Keep your password safe. You are responsible for what happens under your account. Tell us at once if you think someone else is using it.
• You may not create several accounts to earn points or get the free trial more than once.
• You can delete your account at any time from Me → Settings → Delete account. Your materials, questions, study history and points are deleted permanently and cannot be restored. Payment records that the law requires us to keep, and the free-trial record, are kept separately as described in section 3 of the Privacy Policy.

5. Your material and your rights

• You keep copyright and every other right in the material you upload. We do not take any of it.
• You confirm that you obtained or wrote each material lawfully, and that using it for your own study does not infringe anyone else's rights. Please do not upload material you have no right to use.
• You grant us only the licence we need to run the service for you: to extract and store the text, to send it to an AI provider so that questions can be generated, and to show the result back to you.
• We do not use your material in advertising, show it to other users, or use it to train AI models.
• The original file never leaves your device. Only the extracted text and the questions built from it are stored.
• Deleting a material also deletes its text, its questions and the related study history.

6. AI-generated questions

• Questions, answers and explanations are produced automatically and can be wrong. For anything that matters, check against the original material.
• "Go beyond the material" questions (Pro) are built by AI from your material's topic and include content that is not in your material. They come with an explanation instead of a source excerpt and are checked by a second AI pass, but they can still be wrong. Read the explanation, check a trusted source such as a textbook when it matters, and report anything that looks wrong.
• The service is a study aid. It does not replace your textbook or course, and it does not promise any grade or result.
• For medical, legal, financial or other professional matters, consult a qualified professional.
• If a question is wrong or offensive, report it with "Report a problem" on the question screen. Reported questions stop appearing, and recurring problems are fixed in how questions are generated.

7. What you may not do

• Upload someone else's work without the right to do so.
• Upload illegal or harmful content, or content that infringes the rights of others.
• Damage or overload the service, reverse-engineer it, or scrape it.
• Inflate study records or points with automation tools, multiple accounts, or by changing your device clock.
• Use someone else's account, or buy or sell accounts or points.
• Abuse ads, for example by clicking them repeatedly on purpose or making them play automatically.

If we find any of the above, we may warn you, limit your use, suspend or delete the account, and cancel points earned unfairly. In urgent cases we act first and tell you afterwards.

8. Rewards

• Rewards are a benefit of Pro. While you use Pro, points accrue automatically with nothing to sign up for, and you earn points for the days you complete the review quest and for long-term correct answers. No points are earned on the free plan. If you do not want rewards, you can turn them off on the rewards screen at any time.
• Points are used only as a discount coupon on the next payment of your paid subscription. 1P = ₩1, points can be used from 5,000P, and you choose from fixed tiers (monthly plan: 5,000P for 50%, 9,900P for a ₩0 month; 4-month plan: ₩5,000 for every 5,000P, 29,900P for a ₩0 semester). Nothing is used automatically: you pick a tier on the rewards screen and confirm in the Google Play purchase sheet, after which your next payment is charged at the discounted price, and there is one coupon per payment. A coupon cannot be used while auto-renew is off, during a grace period, while the account is on hold or while a plan change is waiting (your points stay). If the subscription ends before the payment the coupon applied to, the points you used are returned; if a discounted payment is refunded, those points are not returned. Points build only during paid periods and trial or launch-offer periods (including remaining trial days moved back when you subscribe during a trial), and not during a month that points made ₩0. Points have no cash value, cannot be exchanged for Pro days, money or gift cards, and cannot be transferred to another person.
• Points expire 12 months after the day you earn them. The oldest points are used first, and we let you know in the app before any expire.
• The exact criteria, the points table, the limits, the coupon tiers and when they can be used, settlement times and hold conditions are in the separate Rewards Rules, which form part of these Terms.
• We do not advertise points in exaggerated terms. Whenever we mention the largest possible benefit, we show the price first, state how it works and its conditions right beside it, and publish the share of subscribers who actually used a coupon last month (starting 6 months after paid subscriptions go on sale, and only for months with at least 30 paying subscribers — Rewards Rules section 12). Rule changes follow Rewards Rules section 9.
• If you delete your account, any remaining points are lost immediately and are not restored or compensated.

9. Paid service

• You can buy a paid subscription (Pro) once prices are shown on the plans screen in the app. The price is the amount shown there and on the store's payment screen (VAT included).
• Products: a monthly plan (1 month) and a semester plan (4 months). Both renew automatically for the same period at the same price until you cancel. If we ever raise a price, we will tell you in advance and ask for your consent as the law requires.
• Free trial: when you first sign up you can use Pro free for a set period (shown at sign-up and on the plans screen). During the trial some limits, such as question generation, may differ from paid Pro. No payment details are needed; when it ends you move to the free plan and nothing is charged automatically. The trial is once per person. If you subscribe during the trial, the remaining trial days are added to your next billing date after the first payment.
• How payment works: subscriptions are sold only through the billing system of the store you installed the app from (such as Google Play). Payment, renewal, cancellation and refunds follow that store's policies.
• Automatic renewal and cancelling: a subscription renews each period until you cancel. You can check the next billing date and cancel at any time in the store's subscription settings (the [Manage subscription (Google Play)] button on the app's plans screen takes you there), and you keep access until the period you already paid for ends. We will not make cancelling difficult.
• Billing dates pushed back by rewards: nothing is charged during the time your billing date has been pushed back by rewards; on the later billing date the original price is charged. If the free time from points was 10 days or more, we tell you 7 days before your next payment in the app, and also with a device notification if you allow notifications from the app.
• Withdrawal and refunds: where local consumer law gives you a right to withdraw (in Korea, within 7 days of payment under the E-Commerce Act and the content-user protection guidelines), you may use it, except for digital content you have already started to use. If our fault or an outage prevents you from using the service, we will extend your period or refund it. Refunds are handled through the store; if the store cannot resolve it, contact us at the address above.
• Refunds and points: if a payment is refunded, the points earned during that payment's period and the free time that payment allowed are removed. If you already used free time from that payment, the same amount is taken from the free-time limit of your next payment. Free days you received with fairly earned points but could not use are returned as 1,000P for every 3 days (Rewards Rules section 5).
• Minors: a purchase made by someone under 19 without the consent of a legal guardian may be cancelled by that person or their guardian.

9-2. Advertising

• On the free plan, one ad or one note from Mirimi may appear after you finish a session (a review, a quiz, cards or one game round), before your results. Ads never appear while you study, when you open the app, or when you leave it.
• There are no ads while you use Pro, a trial or the launch offer.
• Ads are served by Google. Advertisers are responsible for their ads and for the products and services the ads link to. We never use your study material for ads and we do not request personalized ads. If you see an inappropriate ad, please tell us.
• If you want, you can watch an ad to unlock one more practice round (a rewarded ad). If you don't, you can still continue your reviews and wrong-answer retries.
• Sharing information for ads follows sections 4 and 13 of the Privacy Policy.

10. Availability, changes and ending the service

• We aim to keep the service running at all times, but it may pause for maintenance, faults, network problems or an outage at an AI provider. Planned maintenance is announced in the app.
• We may add, change or remove features. Removing an important feature is announced 30 days in advance.
• If a free feature is to become paid, we tell you first and ask for your consent.
• If we change the free plan to your disadvantage, for example by adding or increasing ads or daily limits, we announce it in the app 30 days before it takes effect and ask for your consent.
• If we close the service entirely, we will announce it 30 days in advance and give you time to review and export your study history. Any paid period remaining is refunded.

11. Liability

• While it is free, the service is provided "as is". We do not guarantee the accuracy of materials or questions, their fitness for a particular purpose, or any learning outcome.
• Unless we acted intentionally or with gross negligence, we are not liable for problems caused by your device or connection, study missed because notifications were off or ignored, indirect damage caused by an error in an AI-generated question, or force majeure and outages at external services.
• Where we are liable for a paid service, our liability does not exceed the amount you actually paid in the previous six months.
• Nothing here excludes liability that the law does not allow us to exclude, or any right the law gives you as a consumer.

12. Privacy

How we collect, use, share, entrust and transfer personal data, and the rights you have over it, are set out in the Privacy Policy, available in the app under "Me → Settings → Terms & Privacy".

13. Governing law and disputes

• These terms and your use of the service are governed by the laws of the Republic of Korea.
• If something goes wrong, please contact us first and we will work with you in good faith. If we cannot agree, the courts determined by Korean civil procedure law have jurisdiction.
• If you use the service outside Korea, the above still applies, but it does not take away any mandatory rights you have under the law of the country where you live.

14. Contact

• In the app: Me → Settings → Send feedback
• E-mail: support@iterialab.com

This document is still a draft. The final wording may change after a lawyer's review before release.