From your teacher or school
Google Classroom, class messaging-app attachments, shared drives, or a QR code on a handout that opens an audio page. Save the MP3 to the Files app and it's ready to import.
Listening files
Save the class MP3 once, then pick up where you left off.
Class audio often arrives in a chat, email, or school drive and gets played from there the first time. As files pile up they become harder to find, some chat attachments expire, and playback may stop when you lock the screen or switch apps. Save the file to Otoha and it stays in your own playlist.
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Safari downloads
Messages or chat attachments
Email attachments
AirDrop or school cloud drives
→
Otoha
Listening / Course 01
01-introduction.mp3
02-dialogue.mp3
03-review.mp4
Add the file to a playlist when it arrives.
Choose Otoha from the system share sheet, then select an existing playlist or create a new one. For a batch of class files, put them in one folder and import the folder together. The audio is then available from Otoha without finding the original message again. Pick Otoha in the share sheet and pick or create a playlist. For a batch, organize a course folder in Files and import the whole folder. Saved files never expire.
If you miss a sentence, start again from that sentence.
One listening file
Jump back five seconds, slow it down, or loop the line.
Start with a five-second jump back. If the speech is too fast, reduce playback speed without changing pitch. Use sentence repeat for one line, or set an A-B range when you need the surrounding context.
02-dialogue.mp3Learning Mode
I was hoping we could go over the schedule.
We should carry out the plan as soon as possible.
Sentence loopThat works — let's touch base on Friday.
-5s0.75×1 sentenceA-B
- 01
Save the file to Otoha
Open the system share sheet from a chat app, email, Safari, AirDrop, or Files, choose Otoha, and select a playlist. A folder can also be imported as a batch.
- 02
Play from the start or resume
Playback can continue with the screen locked or while another app is open. The last playback position is kept for the next session.
- 03
Repeat only the part you missed
Use five-second rewind, speed control, sentence repeat, or an A-B loop. Expand the range when you need more context.
- 04
Create captions when there is no transcript
Turn the audio into timed captions. Incorrect lines can be edited or generated again, and a line can be opened for an AI explanation when needed.
If you can hear the words but do not understand the sentence, tap the subtitle and ask AI.
No transcript? Turn one hard sentence into something you can learn from
Start with only the audio: in Learning Mode, AI transcribes it into editable, timed, line-by-line subtitles. You can correct an existing transcript line by line, or transcribe again. Tap the line you missed for an explanation of its words and sentence pattern, then ask follow-up questions about the same vocabulary, expression, or grammar while you slow down and loop the audio.
02-dialogue.mp3
We should carry out the plan as soon as possible.
Sentence loopAI explanation
"Carry out" means to execute or put into action — a set phrase often paired with plan or task, more formal than "do".
Follow-up: how is it different from "implement"?
The playback position is still there the next time you open the file.
See how long you actually practiced
Listening Stats count actual playback time only. Pauses do not count; rewinding and repeating a section count again because that time is part of the practice.
TodayListening
This WeekListening
This MonthListening
Turn recording off or clear it at any time. Clearing statistics does not change audio files or playlists.
Audio sources and support details
Below are common file sources, exam and textbook audio, and the conditions for AI captions. If you already have an ordinary audio file, use the import flow above.
Common import sources
Safari downloads
Messages or chat attachments
Email attachments
AirDrop or school cloud drives
When transcription and AI are available
Transcription results vary with the recording, language, and content. AI availability depends on your device, region, network, account setup, and entitlement. Without available AI, you can still import your own LRC/SRT and use speed, rewind, and loops in the player.
Exam and textbook audio
Exam boards, publishers, schools, and teachers distribute listening material in different ways: downloadable files, school platforms, cloud links, QR-code pages, and official sample audio are all common. Once you have an ordinary audio file, it can be imported into Otoha.
Official exam-board audio
Many exam boards publish sample or past-exam listening audio on their sites; Eiken in Japan posts recent past-exam MP3s for free. Long-press the link (right-click on a computer) and save.
Publisher download pages
Textbook publishers offer MP3 or ZIP downloads, sometimes gated by a password or serial code printed in the book. On iPhone, download in Safari, then tap the ZIP in Files to extract it.
Code-redemption services
Some books ship with a serial code you redeem on a companion service (such as audiobook.jp in Japan) to download the MP3s. Save them to Files, then import.
App-only audio
Some companion apps only stream audio inside the app, with no file export. If the same title also offers a download edition, choose that one and it can live in your own library.
Use audio under the applicable purchase terms and copyright rules. Some textbook downloads expire, so keep a backup of files you are allowed to retain.
Can I learn with AI when I have no transcript?+
Yes. Start with only the audio and AI transcribes it into editable, timed, line-by-line subtitles. Correct an existing transcript line by line or transcribe again, then tap a subtitle line to ask about its words, expression, or sentence pattern.
How do I import a file into Otoha?+
For one file, open the share sheet, choose Otoha, then pick or create a playlist. For a batch, organize a folder in Files and import it. Files received through AirDrop work either way.
The download is a ZIP archive. Now what?+
Tap the ZIP in the Files app and it extracts into a folder. Use Import Folder in Otoha and the whole set becomes one playlist.
My teacher sends voice messages, not files.+
Voice messages use special formats and need converting to an audio file first. Ask for the file itself, or export the voice message as MP3, then share it to Otoha.
What if the teacher sends many files?+
Put the course files in one folder, then use Import Folder in Otoha to create a playlist.
Can it play MP4 lesson videos?+
Yes. Otoha supports local MP4, M4V, and MOV video with subtitles.
The next listening file can go straight into Otoha when it arrives.
Local playback · Lock-screen and background playback · No ads