Available for Android and iPhone

A call timer for 5- and 10-minute calls

For people who want to avoid call-time overage. Android supports auto-end, and iPhone helps you manage call time with alerts.

Built for 5- and 10-minute calling plans

230,000 downloads. Start managing 5- and 10-minute calls right away.

Download on theApp Store
NEW
GET IT ONGoogle Play

Available for Android and iPhone

See how it works

Automatic call duration tracking

Track call time from the start of the call without opening a separate timer.

Built for 5- and 10-minute plans

Set safer buffers such as 4:30 or 9:30 and keep them consistent.

Android and iPhone support

Use auto-end on Android and alert-based timing on iPhone.

Simple and easy to use

Once the timer is set, you can keep using your normal calling flow.

Apps

Choose the version that fits your calling style

Pick the iPhone or Android version that matches how you manage 5- and 10-minute calls.

iOS

Free

Free
  • Set timer before calling
  • Manual number entry or select contact
  • Vibration + alert sound
  • Vibration-only mode
Download Free
Recommended
iOS

Premium

Cheaper than a cup of coffee
  • All free features
  • Save/manage call history
  • One-tap redial (favorites)
  • Custom prefixes
  • Customize alert volume/frequency
  • Auto-clear number after call
Buy Premium

NEW Android

Finally on Android. All premium features included, free with ads.

GET IT ON Google Play

CallTimer

Who this is for

If short calls keep stacking up into real overage, managing them with a system works better than relying on memory.

  • People using a 5-minute calling option
  • People using a 10-minute calling option
  • People who want to see call duration clearly on iPhone
  • People who want to limit call time on Android
  • People trying to cut call charges

Frequently Asked Questions

Frequently Asked Questions

CallTimer is an app designed to help you stay within fixed-length calling options such as 5-minute and 10-minute plans. It alerts you at the point you set so you can wrap up before overage charges start.

CallTimer works with standard carriers and MVNO services alike. Because the timer can be set anywhere from 1 to 60 minutes, it is flexible enough for a wide range of calling options.

Yes. The iPhone version includes free and premium options. The Android version currently includes its main features in the free ad-supported release.

Yes. It supports iPhone on iOS 13 and later, and Android devices on version 7.0 and later.

On Android, yes. On iPhone, no, because iOS does not allow apps to end calls directly. The iPhone version still provides vibration and sound alerts so you know when to stop.

A dial prefix is an extra number string added before the phone number. Some MVNO and discount services use it for cheaper routes. CallTimer can apply that prefix automatically where supported.

Use a timer that is slightly shorter than your free calling window. For a 5-minute plan, 4:30 is the usual starting point. That buffer matters.

The main difference is auto-end support. Android can go further because the OS allows more direct call-state handling. On iPhone, alerts are the main control method.

Yes. CallTimer works with ahamo, povo, LINEMO, Rakuten Mobile, and other carrier or MVNO plans where you want to keep each call within a time limit.

CallTimer app overview

CallTimer is a call duration manager first released on iPhone in 2015, with more than 230,000 downloads to date. The Android version followed in 2026. It is designed for users on 5-minute and 10-minute calling plans, sending vibration or alarm alerts before overage charges begin.

Supported carriers and plans

It works with major Japanese carriers and MVNO plans, including Docomo, au, SoftBank, Rakuten Mobile, Y!mobile, UQ mobile, ahamo, povo, LINEMO, mineo, IIJmio, OCN Mobile ONE, BIGLOBE Mobile, and nuro Mobile.

iPhone and Android differences

FeatureiOS FreeiOS PremiumAndroid
Timer alerts (vibration/alarm)AvailableAvailableAvailable
Automatic call endingNot availableNot availableAvailable
Call history managementNot availableAvailableAvailable
One-tap redialNot availableAvailableAvailable
Prefix supportNot availableAvailableAvailable
Alert customizationNot availableAvailableAvailable
Dark modeAvailableAvailableAvailable
PricingFreeOne-time purchaseFree with ads

How it helps reduce overage

On common Japanese calling plans, going over the included time often costs 22 yen per 30 seconds. On a 5-minute plan, a 10-minute call can add 220 yen. CallTimer warns you before the limit so those avoidable charges do not keep stacking up.

Languages

CallTimer is available in Japanese, English, Simplified Chinese, Traditional Chinese, and Vietnamese.

Available for Android and iPhone

Start managing call time now

Set the timer that matches your plan first, then stop the overages that happen in everyday calls.

Download on theApp Store
GET IT ONGoogle Play