# Kalliope CTI vs eSignApp

The clearest difference is update cadence: Kalliope CTI at every 2 months against eSignApp's every 45 months. Kalliope CTI also leads on iOS requirement (12.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Kalliope CTI ships an update every 2 months, eSignApp every 45 months. The most recent releases landed on October 9, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Kalliope CTI | eSignApp |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 10.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 45 months |
| Monetization | Freemium | — |
| Size | 46 MB | 3 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kalliope srl](https://appshunter.io/developer/1108203677) | [Notartel S.p.A.](https://appshunter.io/developer/1051642634) |

## What reviewers say

### Kalliope CTI

[App page](https://appshunter.io/ios/app/kalliope-cti/id1108203678)

This app provides mobile access to your business phone system, allowing you to make and receive calls using your company lines from anywhere. It offers two modes: Call-Back for GSM quality calls masked by your company number, and Softphone for direct IP registration.

**Highlights:** Access business phone system on mobile, Call-Back mode via GSM, Softphone mode for IP registration, Integrated SIP Client, Call notification when app is off/standby, Manage VoIP calls natively

**Features:** macOS Compatibility, Siri integration

**In-app purchases:** none


### eSignApp

[App page](https://appshunter.io/ios/app/esignapp/id1440468425)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kalliope CTI free?

Kalliope CTI is free to download, with no in-app purchases.

### Is eSignApp free?

eSignApp is free to download, with no in-app purchases.

### Do Kalliope CTI or eSignApp have ads?

Neither Kalliope CTI nor eSignApp shows ads.

### Which is updated more often, Kalliope CTI or eSignApp?

Kalliope CTI ships an update every 2 months, and eSignApp every 45 months. Most recently, Kalliope CTI was updated on October 9, 2026 and eSignApp on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*