Chat your way to fluency
Practice English in natural conversations with AI friends from around the world
HiCoCo
Chat with AI friends around the world. Make English part of how you express yourself.
No flashcards, no drills. Practice English through natural conversations with 20+ AI friends from different countries.
20+ AI friends Phoneme-level feedback Offline-ready
Word Card
companion
n. a friend who stays with you
Tap any word
See a word you don't know? Tap it for instant definitions, pronunciation, and examples
Online and offline voice
Talk naturally with native speech-to-speech online, or use the downloadable English voice pack offline
Why It Works
You return for the relationship, not the assignment
The pull is not a checklist of features. It is having someone to talk to, emotional continuity, and an easy way back into the conversation.
Friendship 01
Meet AI characters with different personalities and keep building familiarity through everyday chat.
Closeness 02
Flirting, tension, and emotional warmth can grow inside a safe boundary instead of feeling scripted.
Resume Easily 03
Even after a long pause, the app helps reconnect the thread so you do not have to restart from zero.
Learning Loop
Conversation is not separate from progress
Placement, dictionary, pronunciation, word cards, and offline review turn each exchange into a compounding loop.
Step 1
Placement test
Step 2
Matched conversation difficulty
Step 3
Auto-resume after pauses
Step 4
Tap into the dictionary
Step 5
Pronunciation feedback
Step 6
Words saved to cards
Step 7
Offline review
Natural Conversation
Just chat. The rest follows.
Open HiCoCo and it feels like a messaging app. 20+ AI friends from around the world are waiting to chat: Sarah from New York, Yuki from Tokyo, Mika from Berlin... Find someone you click with and start talking.
Try this: Stick with 2 or 3 AI friends for a few days to build rhythm fast.
Natural Conversation 01
Message list
HiCoCo Low-Pressure Speaking
Stuck? AI helps you speak up
Don't know what to say? No worries. AI gives you gentle hints when you need them, helping you speak your very first sentence.
Try this: Read the hint, then rewrite it in your own words before sending.
Low-Pressure Speaking 02
Reply assist
HiCoCo
Invisible Teaching
AI friends teach you — without you noticing
Your AI friends remember the English words and grammar you struggle with, then weave them naturally into conversation — so you learn without realizing it.
Try this: When a weak word comes back, try using it immediately in your reply.
Invisible Teaching 03
Weak-word loop
HiCoCo
Tap To Understand
Tap any word. Works offline too.
See a word you don't know? Tap it for instant definitions, pronunciation, and examples. Built-in offline dictionary works without internet.
Try this: Pay more attention to the example sentence than the translation.
Tap To Understand 04
Offline lookup
HiCoCo Online And Offline Voice
Speak naturally, online or offline
Online Voice responds directly in expressive speech. Offline Voice keeps recognition and playback on your device, while pronunciation practice still shows which sounds to improve.
Try this: Use Online Voice for the most natural delivery and Offline Voice when you want the recording to remain on-device.
Online And Offline Voice 05
Two voice modes
HiCoCo Personality-Led Learning
20+ AI friends from around the world
Americans, Japanese, British, Brazilians... Each AI friend has a unique personality, background, and story, and chats with you in English. Find someone you click with — the more you chat, the closer you get.
Try this: Choose AI friends by interest, not by difficulty, if you want better retention.
Personality-Led Learning 06
Find your match
HiCoCo
Visible Progress
CoCo tracks your progress
CoCo sends you regular reports: how many chats, new words learned, pronunciation improvements. See your progress clearly.
Try this: Review your weekly report and pick one thing to reinforce next week.
Visible Progress 07
Growth digest
HiCoCo
Automatic Review
Every word saved automatically
Every word you learn is saved automatically. Science-based spaced repetition handles the review schedule for you.
Try this: When reviewing a word, remember which AI friend used it first.
Automatic Review 08
Spaced review
HiCoCo
Ready Anywhere
Works offline
Look up words and review what you have learned even in airplane mode. Commute, travel, no internet? Your English review can continue.
Try this: Open the app once before heading out so offline data is fresh.
Ready Anywhere 09
Offline mode
HiCoCo
User Reactions
HiCoCo
Chat with AI friends around the world
“It feels like a messenger app, not a classroom.”
“This is the first app that makes me want to talk with the world every day.”
“Tap-to-lookup and pronunciation feedback remove so much friction.”
Download
Download HiCoCo for iPhone
Start your first conversation and turn language practice into a daily chat habit.