# OneLine: Korean Grammar — Writing, chat & daily practice > Writing, chat & daily practice (iPhone/iPad app by Frata Ltd.) - Source: https://appshunter.io/ios/app/oneline-korean-grammar/id6795264714 (this page in markdown: same URL + `.md`) - Developer: [Frata Ltd](https://appshunter.io/developer/777328026) - Category: Education - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 16.4 · 126 MB - Languages: American English - Released: 2026-08-26 - Data updated: 2026-10-09 - User reviews in markdown: https://appshunter.io/ios/app/oneline-korean-grammar/id6795264714/reviews.md ## What is OneLine? Put your Korean into practice. Learn useful Korean grammar, build vocabulary and use what you learn in your own writing and text conversations. OneLine brings lessons, examples and AI feedback together to help you express what you mean. LEARN A PATTERN, THEN USE IT Explore Korean grammar lessons with explanations and examples. Practise using patterns with sentence transformations, then try them in your own writing. WRITE ABOUT YOUR LIFE Start with a daily prompt and find useful words, patterns and example answers before you write. Express your own thoughts in Korean. AI coaching suggests more natural phrasing and explains grammar in English. PRACTISE REAL BACK-AND-FORTH Reply in Korean in a text conversation with Buddy, your AI coach. Get help as you chat, then review feedback from your conversation. BUILD VOCABULARY YOU CAN USE Save useful words and grammar patterns to revisit. Practise with fill-in-the-blank exercises and writing activities. Listen to Korean lesson examples as you learn. KEEP YOUR PRACTICE GOING See your completed writing and conversation practice on your calendar. Return to saved writing, words and patterns whenever you want to review. START FREE Explore lessons, examples, vocabulary and free practice activities. Writing, saving and your streak stay free. New accounts include 7 AI corrections for freeform writing and one introductory text conversation. ONELINE PRO Continue with AI corrections and text conversations, listen to your corrected writing, and get AI feedback on your own word and grammar practice. Pro is available as a monthly or annual subscription. Prices and any eligible offers are shown in the app. Subscriptions renew automatically unless cancelled through your App Store settings. Questions? support@one-line.app Terms: https://one-line.app/terms Privacy: https://one-line.app/privacy ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | OneLine pro annual | $14.99 | per year | | OneLine: Daily Sentence | $2.99 | per month | ## Version history (last 5 releases) ### 1.13.0 — 2026-09-15 More ways to put your Korean into practice. • Chat with Buddy, your AI coach, and get feedback during and after your text conversations. • Choose writing or conversation for your daily practice, including catch-up days. • Explore vocabulary, grammar and examples from a redesigned lesson hub before you practise. ### 1.10.0 — 2026-09-07 New lesson flow: a hub of tappable sections replaces the old step carousel, so you can jump straight to what you want to practice. Your daily line now opens through a short guided lesson — vocabulary and patterns first, then the sentence. Corrections now surface one clear takeaway tied to the grammar pattern you're learning. Practice aids (the composer helper and "Turn it around") are now free for everyone — only deeper coaching is Pro. Example answers now have audio with more voice variety. Smaller fixes: catch-up days stay visible on your calendar after you write, and the "done" screen offers more ways to keep going (words, patterns, or another level). ### 1.9.0 — 2026-08-30 A guided daily lesson. Your prompt now opens with a short warm-up: pick the words you want to keep, read a few example answers, then write your line. Kept words wait for you under the writing area, and your progress is saved at every step. Close anytime, pick up where you left off. A writing page that feels like paper. The composer is now a lined notebook page with your own handwriting style, plus quick Examples, Patterns, and Words buttons when you need inspiration. Also: your day's recap on the home screen (words kept, examples read), bigger listen and translate buttons, a replay option for rewriting today's line, and lots of small polish. ### 1.8.0 — 2026-08-27 What's New in v1.8.0 - Practice got smarter. Coach's pick highlights the most useful word to practice next, with adaptive input that matches the word. Your answer stays visible after you check it, and a red squiggle shows exactly where you went wrong. - Better feedback on corrections. The word-level diff now highlights changed spans more accurately, and correct pattern usage is no longer flagged for unrelated slips. - Smoother experience. The submit button now shows "Analyzing..." with a spinner while your sentence is being reviewed. Fixed a layout gap on the write screen, badge flickering on the Patterns tab, and grammar form labels now appear on every practice item. - New celebration flow. The post-correction celebration has been redesigned. - Promo codes. You can now redeem promo codes on both iOS and Android. ### 1.6.0 — 2026-08-27 No release notes. ## Apps similar to OneLine | App | Rating | Price | Category | | --- | --- | --- | --- | | [Eachday: Word of the Day](https://appshunter.io/ios/app/eachday-word-of-the-day/id6786476993) | 5.0 (9) | Free | Education | | [Loqu: Language Learning](https://appshunter.io/ios/app/loqu-language-learning/id6736823979) | — | Free | Education | | [Korea Lens: Scan to Fluency](https://appshunter.io/ios/app/korea-lens-scan-to-fluency/id6747736496) | 3.0 (2) | Free | Education | | [Korean and Japanese: Alfabird](https://appshunter.io/ios/app/korean-and-japanese-alfabird/id6475051383) | 4.6 (14) | Free | Education | | [Talksy – AI Language Learning](https://appshunter.io/ios/app/talksy-ai-language-learning/id6450812140) | 4.1 (8) | Free | Education | | [Koko Learn Korean with Stories](https://appshunter.io/ios/app/koko-learn-korean-with-stories/id6751234829) | 4.7 (160) | Free | Education | ## More apps by Frata Ltd - [Chiado](https://appshunter.io/ios/app/chiado/id6803688127) All apps by Frata Ltd: https://appshunter.io/developer/777328026 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-09.*