Kalliope CTI vs eSignApp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kalliope CTI
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.
- 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
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************************************ Product requires a KalliopePBX® V4 Minimum firmware version: 4.10.2 Recommended firmware version: 4.11.7+ Kalliope CTI Phone / Pro license required* ************************************ RC version. KalliopePBX® in your pocket! You no longer risk being unreachable! For those who need to be always available, Kalliope has designed the KCTI mobile app for iOS® systems. Telephone and UC services can also be accessed outside the office, using the extension number and using company lines. The Mobile App offers the freedom to choose how to manage your calls based on the availability of data traffic: • Call-Back mode: the mobile app allows you to manage incoming and outgoing calls through the user's SIM, then in GSM mode, using the company lines attested to KalliopePBX®. The call will have the same quality as a normal mobile phone call without any cost on the mobile phone contract and will be masked by the company's geographical number. • Softphone mode: the user uses the smartphone like an extension. KalliopeCTI Mobile will allow the smartphone to register directly on KalliopePBX® like any IP client. The softphone mode therefore offers: • Integrated SIP Client • Integrated native libraries to ensure softphone reachability even when the terminal is in standby. • Call notification with app turned off or in stand-by mode • Management of VoIP calls in native way * A KCTI Pro license is required to use the GSM ™ mode only. For the use of both modes, GSM ™ and Softphone, a KCTI Phone license is required instead
eSignApp
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eSignApp è l'applicazione per la “firma digitale remota” dei notai sviluppata da Notartel per conto del Consiglio Nazionale del Notariato (CNN). Progettata esclusivamente per i notai italiani, consente di firmare documenti direttamente da smartphone e tablet.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 September 22, 2026 and October 3, 2026 respectively.
| Parameter | Kalliope CTI | eSignApp |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 10.0% of reviews | — |
| Update frequency | Every 2 months — better | Every 45 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Freemium | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 46 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Kalliope srl | Notartel S.p.A. |
In-app purchases
Kalliope CTI
No in-app purchases
eSignApp
No in-app purchases









