電話を録音する：知っておくべきことすべて

Recording phone calls can be incredibly useful—whether you're documenting an important conversation, capturing an interview, or saving details from a business meeting. Understanding how to record phone calls effectively involves more than just hitting a button; it requires the right tools and awareness of legal and ethical boundaries.

In this blog, we’ll share essential tips of call recording and introduce some of the best call recorder tools available today. From built-in phone features to third-party apps, knowing what options suit your needs can make all the difference in capturing clear and reliable recordings.

We’ll also guide you on how to stay compliant with relevant laws when you record phone calls and explore how VOMO AI can enhance your workflow by transcribing and summarizing recorded calls—turning raw conversations into actionable insights.

Why Recording Phone Calls Is Still So Difficult in 2026

After testing multiple devices and apps, one thing is clear:

Recording phone calls is not as simple as installing an app.

In practice:

• Many apps fail to capture both sides of the call
• Features differ significantly between devices
• System-level restrictions limit functionality

This explains why users often struggle—even when using popular tools.

The Biggest Limitation: Why Most Apps Can’t Record Both Sides

One of the most frustrating issues is incomplete recordings.

From real testing:

• Some apps only capture your voice
• The other participant’s audio is missing or unclear

This happens because:

• Operating systems restrict access to call audio
• Apps rely on microphone input instead of direct call data

As a result, not all “call recorder” apps actually work as expected.

The Workaround Reality: What Actually Works Today

When direct recording fails, users rely on practical workarounds.

Common solutions include:

• Using speaker mode and recording with another device
• Recording via video orvoice recorder apps
• Using VoIP platforms with built-in recording

These methods are not perfect, but they provide a more reliable way to capture both sides of a conversation.

Android vs iPhone: Why Your Device Changes Everything

Call recording behavior varies significantly depending on your device.

On iPhone:

• No native call recording
• Requires third-party apps or VoIP solutions

On Android:

• Some apps work—but inconsistently
• Functionality depends on manufacturer and OS version

This explains why a method that works on one phone may fail on another.

Audio Quality Matters More Than You Think

Recording a call is only useful if the audio is clear.

In real-world scenarios:

• Speakerphone recording introduces background noise
• Low-quality microphones reduce clarity
• Poor audio leads to inaccurate transcription

Improving audio quality directly improves:

👉 transcription accuracy
👉 summary quality
👉 usability of the recording

Legal Considerations for Recording Phone Calls

Before recording any phone call, ensure you’re complying with the laws in your jurisdiction:

1. One-Party Consent vs. Two-Party Consent

Only one participant (you) needs to consent to the recording. This applies in most U.S. states, so if you wonder if you can record a conversation in Arizona, the answer is generally yes.

Two-Party Consent: All participants must consent to the recording. This is required in states like California, Florida, Illinois, or Pennsylvania.

2. Notify Participants

Even if you’re in a one-party consent state, notifying participants is a best practice to avoid ethical or legal issues.

3. International Laws

If you’re recording an international call, be aware of the privacy laws in the other country.

When You Should Always Inform the Other Party

Even in regions where one-party consent applies, informing the other party is often the safest choice.

In practice, this is especially important for:

• Business calls
• Client conversations
• Sensitive discussions

A simple disclosure can help:

• Avoid legal ambiguity
• Build trust
• Prevent disputes

How to Record the Phone Call

Recording phone calls on your smartphone or other devices requires specific tools, as neither iOS nor Android natively supports direct call recording due to privacy concerns. Below are some reliable methods:

1. Using Third-Party Apps

For iPhone

Apps like Rev Call Recorder and TapeACall enable you to record phone calls with ease.

• Steps:

1. Download and install the app from the App Store.
2. Follow the app’s instructions to merge calls or start recordings.
3. Save and access the recordings through the app.

For Android

Apps like Cube ACR and Automatic Call Recorder are popular options for Android users.

• Steps:

1. Download the app from the Google Play Store.
2. Grant the app permissions to access your phone’s microphone and calls.
3. Start recording during the call or set it to record automatically.

2. Using a VoIP Service

Apps like Zoom or Google Voice allow you to make and record calls over the internet.

• Steps:

1. Initiate the call through the app.
2. Use the built-in recording feature to capture the conversation.
3. Save or share the recording as needed.

3. Using a Hardware Recorder

If apps aren’t an option, you can use external hardware like the Olympus TP-8 Telephone Pick-up Microphone or digital recorders that connect directly to your phone.

• Steps:

1. Connect the recorder to your phone’s audio jack or use a microphone attachment.
2. Press record before starting the conversation.
3. Save the audio file on the recorder for later use.

Tips and Tricks of Call Recording

Here, we’ll introduce some useful tips for recording phone calls.

• Label Your Recordings Promptly
  To stay organized and avoid confusion, label each recording right after the call. Clear titles will make it easier to locate and review specific conversations later.
• Optimize for High-Quality Audio
  For the best results, especially in noisy environments, consider using a high-quality external microphone. Clearer recordings lead to more accurate transcriptions and easier analysis.

From Recording to Transcription: The Missing Step in Most Workflows

Recording a call is only the first step.

In real workflows, users quickly run into a second challenge:

👉 How to extract useful information from recordings

Listening to long recordings repeatedly is inefficient.

This is where transcription becomes essential.

Why Raw Recordings Are Not Enough

A recorded call alone has limited value.

From experience:

• It’s difficult to search
• Important points are hard to locate
• Reviewing takes too much time

What users actually need is:

• Searchable text
• Structured summaries
• Key takeaways

Why Use VOMO AI After Recording Phone Calls?

Once you’ve recorded a phone call, the next step is often reviewing, organizing, and extracting the most important details. Here’s where VOMO AI comes in:

1. Accurate Transcriptions

Powered by Whisper AI, VOMO AI converts your phone call recordings into highly accurate text, even in cases with background noise or multiple speakers.

2. Smart Summaries

Generate concise podcast or call summaries, capturing the key points and actionable items in minutes.

3. Multi-Language Support

Transcribe and summarize phone calls in over 50 languages, making it ideal for international business or personal use.

4. Shareable Notes

Create shareable transcripts and summaries that can be distributed to team members or saved for future reference.

Turning Phone Calls into Actionable Insights with AI

The real value comes after transcription.

With tools like VOMO AI, you can:

• Convert recordings into accurate transcripts
• Automatically generate summaries
• Extract key decisions and action items

This transforms phone calls from:

👉 passive recordings
to
👉 actionable business insights

How to Use VOMO AI with Recorded Phone Calls

1. Upload Your Recording

• After recording your call using a third-party app or hardware, upload the audio file to VOMO AI.

1. Transcribe the Audio

• Let the app convert the recording into a searchable, editable text format.

1. Generate Smart Notes

• Use VOMO AI’s Smart Notes feature to create a concise summary of the conversation.

1. Save and Share

• Export or share the transcript and summary for easy collaboration or record-keeping.

Tips for Successful Call Recording

• Test Before Recording: Ensure your recording setup works correctly before the actual call.
• Inform Participants: Always notify other participants to avoid legal issues.
• Store Recordings Securely: Keep sensitive recordings in a secure location.
• Use Quality Equipment: If using hardware, choose devices with noise-canceling features for clear audio.

For those looking to take their recordings to the next level, VOMO AI offers powerful tools powered by advanced AI models to help you get the most out of your audio content. Whether you’re converting audio to text, speech to text, or generating clear and actionable AI meeting notes, VOMO streamlines the process. It also supports dictation, organizes your voice memos, and even turns video to text or processes a YouTube Transcript with ease—giving you smarter summaries and deeper insights in less time.

Ready to simplify your workflow? Try VOMO AI today and transform your recorded calls into actionable insights with ease!