ACR Call Recorder: What It Is & How to Use It

ACR Call Recorder is a popular Android app that automatically records phone calls and stores them on your device. You install it, grant the necessary permissions, and it records both incoming and outgoing calls, saving them as audio files you can play back, share, or back up. This article explains how the app works, its key features, common issues, and how it compares to other call recording options.

Background and Purpose

Call recording apps have existed for years, but their functionality has changed dramatically with Android OS updates. Older versions of Android allowed apps to record calls directly from the microphone or the call audio stream. Modern Android versions (especially Android 10 and later) restrict access to call audio for privacy and security reasons. ACR Call Recorder has adapted by using the device’s microphone to capture both sides of the conversation, which is why the recording quality can vary depending on your phone model and how you hold it.

The app was developed by NLL Apps and is one of the most widely used call recorders on the Google Play Store. It is not a system app, so it does not require root access, making it accessible to most users. The primary purpose is simple: give you a permanent record of your calls for personal reference, legal evidence, or business documentation.

How ACR Call Recorder Works

ACR records calls by accessing the microphone during a call. When you make or receive a call, the app starts recording automatically (if you’ve enabled that setting). It captures the audio from the speaker and the person on the other end, then saves it as an MP3 or WAV file in a folder on your device.

The app offers several recording modes:

• Automatic: Records every call without prompting.
• Manual: You tap a button to start recording during a call.
• Ask each time: Shows a notification asking whether to record.

You can also choose to exclude specific contacts or numbers from recording, and set a maximum file size or duration. After the call, the recording appears in the app’s list, where you can play it, rename it, add notes, or share it via email, cloud storage, or messaging apps.

Key Features and Settings

ACR Call Recorder is not just a basic recorder; it includes features that make managing recordings easier:

• Cloud backup: You can sync recordings to Google Drive, Dropbox, or OneDrive automatically.
• Search and sort: Find recordings by contact name, phone number, or date.
• Recording formats: Choose between MP3 (smaller files) and WAV (higher quality, larger files).
• Speakerphone toggle: Some devices record better with the speakerphone on, and the app can remind you to enable it.
• Notification controls: Show or hide recording status in the notification bar.
• Password protection: Lock the app with a PIN or fingerprint to keep recordings private.

You can also adjust the recording source (voice call, microphone, or voice recognition) depending on your device. The default is usually “Voice call” which works on most phones, but if you experience low volume on the other person’s side, switching to “Microphone” might help.

Compatibility and Device Issues

Not all Android phones work equally well with ACR. Because of Android’s fragmentation, manufacturers modify the operating system, and some of these modifications break call recording. Common problem devices include:

• Phones with custom skins like Xiaomi (MIUI), Samsung (One UI), and Huawei (EMUI) often require extra permissions or settings.
• Devices running Android 10 or higher may not allow the app to access call audio, forcing it to use the microphone.
• Some phones have a hardware limitation that prevents recording the other person’s voice clearly.

If you encounter issues, try these steps:

1. Check that you’ve granted all permissions (microphone, phone, storage, and notifications).
2. Go to your phone’s battery settings and ensure ACR is not being killed in the background.
3. Switch the recording source in ACR’s settings (try “Voice call” then “Microphone”).
4. Enable the “Speakerphone” option in ACR if your phone’s microphone can’t pick up the earpiece audio.
5. Update the app and your phone’s OS to the latest versions.

ACR vs. Other Call Recorders

ACR is often compared to built-in call recording features (on some Xiaomi, Samsung, and Pixel phones) and other apps like Cube ACR or Automatic Call Recorder. Here’s how they differ:

• Built-in recording: Some phones have a native call record button during calls. This is the most reliable because it uses the system’s call audio directly. However, it may not be available on all models or carriers, and recordings are stored in the phone’s dialer app.
• Cube ACR: A similar app that also records VoIP calls (WhatsApp, Skype) in addition to regular calls. ACR Call Recorder focuses only on cellular calls.
• Automatic Call Recorder: Another popular app with a simpler interface but fewer customization options.

ACR stands out because of its extensive settings and cloud backup options, but if you need to record WhatsApp calls, Cube ACR is a better choice.

Cost and Free vs. Pro

ACR Call Recorder is free to download and use, but it contains ads. The free version allows unlimited recordings, playback, and sharing. There is also a paid version called ACR Pro (one-time purchase) that removes ads and adds extra features like:

• Recording in higher quality (WAV format).
• Automatic cloud backup to multiple accounts.
• No ads.
• Priority support.

Most users will find the free version sufficient. The Pro version is a one-time payment, not a subscription, which is a plus compared to some other apps that charge monthly.

Legal and Privacy Considerations

Recording phone calls is legal in many places, but it is illegal in some jurisdictions without the consent of all parties. Before using ACR, check your local laws. In the United States, for example, some states require two-party consent, meaning both people on the call must know they are being recorded. In other countries, one-party consent is sufficient.

To stay safe:

• Inform the other person that you are recording, or at least be aware of your local laws.
• Do not use recordings for illegal purposes, such as blackmail or harassment.
• Keep recordings secure, especially if they contain sensitive information.

ACR stores recordings in plain audio files on your device. If you lose your phone, anyone with access could listen to them. Consider using the app’s password lock and encrypting your phone.

Frequently Asked Questions

Does ACR Call Recorder work on iPhone?

No, ACR Call Recorder is only available for Android. iOS does not allow third-party apps to record phone calls due to system restrictions. iPhone users can only record calls by using a second device or a VoIP service that supports recording.

Why is the other person’s voice so quiet in my recordings?

This is often because the app is using the microphone instead of the call audio stream. Try changing the recording source in ACR settings to “Voice call” (if available) or enable the speakerphone during calls. On some phones, you may need to adjust the “Microphone gain” setting in the app.

Can I record WhatsApp or Skype calls with ACR?

No, ACR Call Recorder only records regular cellular calls. For VoIP calls (WhatsApp, Skype, Messenger), you would need a different app like Cube ACR, which specifically supports those services.

Where are my recordings saved?

By default, recordings are saved in the app’s private folder on your phone’s internal storage. You can change the location in settings to an SD card or a specific folder. The files are usually named with the contact name and timestamp.

Does ACR work on Samsung phones?

Yes, but on many Samsung devices, especially those running Android 10 or newer, ACR must use the microphone to record. This means you’ll need to keep the phone’s speaker on for the other person’s voice to be captured. Some Samsung phones have a built-in call recorder that works better, so you might prefer that.

Is ACR Call Recorder safe to use?

Yes, the app is widely used and has millions of downloads. However, it does request sensitive permissions (microphone, phone, storage), so you should only download it from the Google Play Store. Be cautious about granting permissions to any app, and review the app’s privacy policy to understand how your data is handled.

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