jolbaro
Danny & Jenny · 대니앤제니
Danny & Jenny (대니앤제니) is an iPhone English-conversation app by Jolbaro, a one-person startup in Seoul. It is built for Korean speakers. Korean-American AI friends who also understand Korean call you at the times you set; you chat freely in Korean, English or a mix, then say that same conversation again in English only. Not a lesson, a phone call. Your friend remembers the last call, so today picks up where you left off.
Pick a friend, or wait for the call at the time you set. Part one is free chat in Korean, English or whatever comes out. Where you get stuck, say the word in Korean: "I was so 당황했어" comes back as "Oh, you were flustered? That's rough…" inside the friend's reply, with no lesson. Then, if you want, you say the same conversation again in English only.
Each call leaves expression cards: what you actually said on the front, the natural English on the back. You keep the ones worth learning and say them aloud again when you are about to forget them. Your friend works the phrases that are due back into the next call, and the app records how much of each week you spoke in English.
With a native-speaker tutor or a chatbot that only speaks English, every sentence has to be English, so learners with a story to tell fall back to small talk and the conversation stays shallow. When the friend also understands Korean, you can keep the English going and drop in Korean only where you get stuck. The maker built the app after a semester with a Korean-American friend who worked exactly that way.
Closer to a phone call than a lesson. Chat with a Korean-American AI friend in Korean, English or a mix, then try saying that same conversation again in English only.
You can mix. Keep the big picture in English and drop in Korean only where you get stuck; your friend hands it back as natural English inside the reply, and the conversation keeps going.
Free calls three times a week, three minutes each, with every friend, memory, expression cards and review included. Subscription prices for longer or more frequent calls are shown in the App Store.
Yes. Your friend calls at the day and time you set, rings on the lock screen like a real call, remembers the last call and picks up where you left off. You can also call first.
Twenty Korean-American AI friends, each with a job, a neighborhood and a way of talking. Their Korean ranges from beginner to fluent, so how much English you use shifts naturally with the friend. We never hide that they are AI.
No. Every friend is an AI, not a human tutor or a native-speaker phone lesson. It is a call with a Korean-American AI friend who also understands Korean, and the app never hides that.
Yes. Start with a friend who speaks Korean well and chat mostly in Korean. Move to a friend whose Korean is weaker as you get comfortable, and your share of English rises on its own.
iPhone (iOS) only, from the App Store, for ages 18 and over. The app's interface is in Korean; it is built for Korean speakers learning English.
Not yet. Currently iPhone (iOS) only.
How calls are processed and stored is described in the privacy policy. Call audio is not kept; text transcripts and the learning material made from them are.
Read the privacy policyKorean speakers whose mind goes blank the moment they have to speak English, who only ever managed small talk with native-speaker phone lessons or tutors, or who want to tell a slightly complicated story but get stuck on a missing word. If you want a fixed curriculum to progress through, this is not it.
Jolbaro, a one-person startup in Seoul, South Korea. One person plans, builds and runs the app. It launched on the App Store in August 2026. Press and review inquiries: [email protected].
They are two of the most common names among Korean-Americans. The idea: anyone can have a friendly Korean-American friend.