Hello, I am Jae Ung, building Lightning TOPIK alone. I read every message myself and usually reply within 48 hours.
Email: ung@sai-korean.com
On your phone, iPhone or Android. There is no account and no server-side copy, so deleting the App removes your progress from your phone. If you use your phone’s own backup (iCloud Backup on iPhone, Google’s backup on Android), it may hold a copy that we cannot see, and a reinstall or a new phone may restore your progress from it; that backup follows your iCloud or Google account settings. See the Privacy Policy.
No. Word levels follow the National Institute of Korean Language’s level list, which is aligned to TOPIK levels 1 to 6. Lightning TOPIK is an independent app, not affiliated with NIIED.
Every TOPIK level is free, with five new words a day and every review of the words you have started. Lifetime is a one-time purchase that removes the daily limit on new words. It is not a subscription.
Sign in with the same Apple ID, open Profile, and tap Restore purchases.
Touch and hold the lock screen, tap Customize, choose the lock screen, tap the widget area, and add Lightning TOPIK.
Open iOS Settings › Lightning TOPIK › Notifications and allow notifications, then set a reminder time in Profile › Reminders.
Everything is free on Android: every TOPIK level, every new word and every review. The App shows ads, on Home, above the word card during a review and after a session, but never during onboarding or on your first day. Remove ads is a one-time purchase that turns the ads off and helps keep the App running. It is not a subscription.
Sign in to Google Play with the same Google account and install the App; it finds your purchase when it opens. You can also open Profile › Remove ads and tap Restore.
Where the law asks for consent (for example in the European Economic Area, the United Kingdom and Switzerland), open Profile › Privacy choices. Everywhere, you can reset or delete your advertising ID in your Android settings. See the Privacy Policy, Section 2.
Touch and hold an empty spot on your Home screen, tap Widgets, find Lightning TOPIK, and drag its widget onto the screen (some phones show an Add button instead).
Open Android Settings › Apps › Lightning TOPIK › Notifications and allow notifications, then set a reminder time in Profile › Reminders.