# Call4U

> VoIP calling application for business needs, supporting SIP protocol and various internet connections. (iPhone/iPad app by Digi Telecom Limited.)

- Source: https://appshunter.io/ios/app/call4u/id579919817 (this page in markdown: same URL + `.md`)
- Developer: [Digi Telecom Limited](https://appshunter.io/developer/989105912)
- Category: Business, Social Networking
- Price: Free
- Age rating: 4+
- Requires: iOS 8.0 · 13 MB
- Languages: American English
- Released: 2012-11-28
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/call4u/id579919817/reviews.md

## What is Call4U?

Call4U is a mobile dialer or application which makes VoIP calls with minimum iOS version support of 3.2 on Apple iPhone, iPad, iPod and it uses the 3G/Edge/wifi Internet connectivity.

Call4U is developed based on the requirements of VoIP Providers business needs.

Features :-


Call4U uses SIP protocol based for signaling.
Call4U Supports all codecs.
Call4U run Behind NAT or private IP.
User Friendly Interface.
Auto Sync of Balance.
Real Time Sip status messages.
Call History.
Loud Speaker.
Hold.
Address book integration.
Compatible with all sip standard switches.
It has very efficient implementation of jitter buffer to play voice smoothly.
Silent suppression and comfort noise generation has been used to reduce the bandwidth usage, and this makes the dialer more efficient in making VoIP calls.

## Key features

- VoIP calls over internet
- SIP protocol support
- Address book integration
- User-friendly interface
- Auto sync of balance
- Real-time SIP status

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/call4u/id579919817/reviews.md

### 4/5 — Very good app

*2019-05-27, version 1.0.8*

I just read complaints on this app, which I found myself hard to believe as I have just this app in and off for about a year. I can only speak to how I found it. Which is awesome and at the end of each call you will get a saving against just placing directly. Look, there are positives in life just as they have negatives but I haven’t found any!! Have a go you like keep you don’t like them delete it. Personally I love and since my son recommended it to me hey wants not to like?

### 1/5 — Is this a scam?

*2015-05-15, version 1.0.7*

It asked me for personal information to register, but then would not let me direct dial. It then asked me for access to my contacts. 

Once I added my contacts, it claimed I wasn't registered. But the registration option is gone!!

Avoid

## Frequently asked questions about Call4U

### What is Call4U?

Call4U is a mobile dialer application that enables VoIP calls using internet connectivity. It is developed for the business needs of VoIP Providers.

### What devices is Call4U compatible with?

Call4U is compatible with iPhone, iPod, and iPad devices running iOS version 3.2 or later.

### Does Call4U support offline calling?

No, Call4U requires an internet connection such as 3G, Edge, or Wi-Fi to make VoIP calls.

### How does Call4U handle call quality?

Call4U features an efficient jitter buffer for smooth voice playback and uses silent suppression and comfort noise generation to reduce bandwidth usage.

### Is Call4U suitable for personal use?

While Call4U can be used for personal calls, it is specifically developed based on the requirements of VoIP Providers business needs.

### What is the release date and last update for Call4U?

Call4U was first released on November 28, 2012, and its latest version, 1.0.8, was updated on October 5, 2017.

### Does Call4U have ads?

No, Call4U does not contain advertisements.

### What is the age rating for Call4U?

Call4U has an age rating of 4+.

## Version history (last 4 releases)

### 1.0.8 — 2017-10-05

This app has been updated by Apple to display the Apple Watch app icon.

UI Design Changes.

### 1.0.7 — 2014-07-28

1.Registration issues fixed.
2.GUI issue fixed.
3.UI changed.

### 1.0.5 — 2013-06-19

Bugs Fixed
Voice Quality Improved

### 1.0.3 — 2012-11-27

No release notes.

## More apps by Digi Telecom Limited

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All apps by Digi Telecom Limited: https://appshunter.io/developer/989105912

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*